This section lists the fabric scaling information.
| 
                                 Attribute  | 
                            
                                 Product  | 
                            
                                 Maximum number supported (with and without vIST)  | 
                        
|---|---|---|
| 
                                
                                 Number of SPB IS-IS areas  | 
                            
                                 5320 Series  | 
                            
                                
                                 1  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                 1  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                 1  | 
                        |
| 
                                 5720 Series  | 
                            
                                 1  | 
                        |
| 
                                 Number of B-VIDs  | 
                            
                                 5320 Series  | 
                            
                                
                                 2  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                 2  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                 2  | 
                        |
| 
                                 5720 Series  | 
                            
                                 2  | 
                        |
| 
                                
                                
                                
                                 Maximum number of Physical and Logical (Fabric Extend) NNI interfaces/adjacencies  | 
                            
                                 5320 Series  | 
                            
                                
                                 64  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                 50  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                 128  | 
                        |
| 
                                 5720 Series  | 
                            
                                
                                 128  | 
                        |
| 
                                 SPBM enabled nodes per area (BEB + BCB)  | 
                            
                                 5320 Series  | 
                            
                                
                                 350 without boot config flags spbm-node-scaling 500 with boot config flags spbm-node-scaling  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                
                                 350 without boot config flags spbm-node-scaling 500 with boot config flags spbm-node-scaling  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                 800  | 
                        |
| 
                                 5720 Series  | 
                            
                                
                                 1000  | 
                        |
| 
                                
                                 Number of BEBs not part of vIST clusters this node can share services with (Layer 2 VSNs, Layer 3 VSNs, E-Tree, Multicast, Transparent Port UNI)  | 
                            
                                 5320 Series  | 
                            
                                
                                
                                 350 without boot config flags spbm-node-scaling 500 with boot config flags spbm-node-scaling  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                
                                 350 without boot config flags spbm-node-scaling 500 with boot config flags spbm-node-scaling  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                
                                 800  | 
                        |
| 
                                 5720 Series  | 
                            
                                
                                 2,000  | 
                        |
| 
                                
                                 Number of BEBs that are part of a vIST cluster this node can share services with (Layer 2 VSNs, Layer 3 VSNs, E-Tree, Multicast, Transparent Port UNI)  | 
                            
                                 5320 Series  | 
                            
                                
                                 300  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                
                                 300  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                
                                 800  | 
                        |
| 
                                 5720 Series  | 
                            
                                
                                 1,000  | 
                        |
| 
                                 I-SIDs supported (local UNI present on device)  | 
                            
                                 5320 Series  | 
                            |
| 
                                 5420 Series  | 
                            ||
| 
                                 5520 Series  | 
                            ||
| 
                                 5720 Series  | 
                            ||
| 
                                 Maximum number of Layer 2 VSNs per switch (local UNI present on device)  | 
                            
                                 5320 Series  | 
                            
                                
                                 48-port models: 500 16- and 24-port models: 250  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                 500  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                 3,580  | 
                        |
| 
                                 5720 Series  | 
                            
                                
                                 4,000  | 
                        |
| 
                                 Maximum number of Transparent Port UNIs per switch  | 
                            
                                 5320 Series  | 
                            
                                
                                
                                 48-port models: 53 24-port models: 29 16- models: 20  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                 56  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                 48-port models: 48 24-port models: 24  | 
                        |
| 
                                 5720 Series  | 
                            
                                
                                 60  | 
                        |
| 
                                 Maximum number of Layer 2 E-Tree/PVLAN UNIs per switch  | 
                            
                                 5320 Series  | 
                            
                                
                                 48-port models: 50 16-port and 24-port models: 20  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                 100  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                 200  | 
                        |
| 
                                 5720 Series  | 
                            
                                
                                 100  | 
                        |
| 
                                
                                 Maximum number of routed PVLANs/E-Trees  | 
                            
                                 5320 Series  | 
                            
                                 10  | 
                        
| 
                                 5420 Series  | 
                            
                                 10  | 
                        |
| 
                                 5520 Series  | 
                            
                                 10  | 
                        |
| 
                                 5720 Series  | 
                            
                                 100  | 
                        |
| 
                                 Maximum number of Switched UNI Endpoints (C-VID or untagged port bindings)  | 
                            
                                 5320 Series  | 
                            
                                 See Maximum Number of Switched UNI Endpoints (C-VID or Untagged Port Bindings).  | 
                        
| 
                                 5420 Series  | 
                            
                                 See Maximum Number of Switched UNI Endpoints (C-VID or Untagged Port Bindings).  | 
                        |
| 
                                 5520 Series  | 
                            
                                 See Maximum Number of Switched UNI Endpoints (C-VID or Untagged Port Bindings).  | 
                        |
| 
                                 5720 Series  | 
                            
                                 See Maximum Number of Switched UNI Endpoints (C-VID or Untagged Port Bindings).  | 
                        |
| 
                                 Maximum number of Layer 3 VSNs per switch See VRF Scaling.  | 
                            
                                 5320 Series  | 
                            
                                
                                 48-port models: 64 16- and 24-port models: 1 local VRF and 23 remote accepted I-SIDs  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                 64  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                 256 including mgmt VRF and GRT  | 
                        |
| 
                                 5720 Series  | 
                            
                                
                                 256  | 
                        |
| 
                                 Maximum number of SPB Layer 2 multicast Data I-SIDs  | 
                            
                                 5320 Series  | 
                            |
| 
                                 5420 Series  | 
                            ||
| 
                                 5520 Series  | 
                            ||
| 
                                 5720 Series  | 
                            ||
| 
                                 Maximum number of SPB Layer 3 multicast Data I-SIDs  | 
                            
                                 5320 Series  | 
                            |
| 
                                 5420 Series  | 
                            ||
| 
                                 5520 Series  | 
                            
                                
                                 Maximum 4,000 for a BEB: Due to internal resource sharing IP Multicast scaling depends on network topology. Switch will issue warning when 85 and 90% of available resources are reached.  | 
                        |
| 
                                 5720 Series  | 
                            ||
| 
                                 Maximum number of FA ISID/VLAN assignments per port  | 
                            
                                 5320 Series  | 
                            
                                
                                 94  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                 94  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                 94  | 
                        |
| 
                                 5720 Series  | 
                            
                                
                                 94  | 
                        |
| 
                                 Maximum number of IP multicast S,Gs when operating as a BCB (intra-area)  | 
                            
                                 5320 Series  | 
                            
                                
                                 16,000  | 
                        
| 
                                 5420 Series  | 
                            
                                
                                 16,000  | 
                        |
| 
                                 5520 Series  | 
                            
                                
                                 16,000  | 
                        |
| 
                                 5720 Series  | 
                            
                                
                                 50,000  | 
                        
The number of Switched UNI endpoints supported varies based on other feature configuration.
The following table provides the maximum number supported with and without vIST.
| 
                                 Product  | 
                            
                                 Total Number of Switched UNI Endpoints  | 
                            
                                 Feature configuration  | 
                        
|---|---|---|
| 
                                 5320 Series Note: 
                                     
                            Resources are shared with NEAP clients.  | 
                            
                                 800  | 
                            
                                 boot config flags macsec: NO boot config flags spbm-node-scaling: NO Platform VLAN present: N/A  | 
                        
| 
                                 800  | 
                            
                                 boot config flags macsec: YES boot config flags spbm-node-scaling: NO Platform VLAN present: NO  | 
                        |
| 
                                 700  | 
                            
                                 boot config flags macsec: YES boot config flags spbm-node-scaling: NO Platform VLAN present: YES  | 
                        |
| 
                                 400  | 
                            
                                 boot config flags macsec: N/A boot config flags spbm-node-scaling: YES Platform VLAN present: N/A  | 
                        |
| 
                                 5420 Series  | 
                            
                                 800  | 
                            
                                 boot config flags macsec: NO  | 
                        
| 
                                 700  | 
                            
                                 VLAN-based with boot config flags macsec  | 
                        |
| 
                                 400  | 
                            
                                 boot config flags spbm-node-scaling: YES  | 
                        |
| 
                                 5520 Series  | 
                            
                                 4,900  | 
                            
                                 N/A  | 
                        
| 
                                 5720 Series  | 
                            
                                 12,000  | 
                            
                                 N/A  | 
                        
The number of I-SIDs supported varies for Layer 2 and Layer 3 ingress and egress BEBs.
| 
                                 Attribute  | 
                            
                                 Product  | 
                            
                                 Maximum number supported (with and without vIST)  | 
                        |
|---|---|---|---|
| 
                                 Maximum number of Layer 2 multicast Data I-SIDs Note: 
                                     
                            Overall limits across all Layer 2 VSNs  | 
                            
                                 On Ingress BEB: Dynamic and Static originated Data I-SIDs  | 
                            
                                 5320 Series  | 
                            
                                 16- and 24-port models: 250 48- port models: 500  | 
                        
| 
                                 5420 Series  | 
                            
                                 500  | 
                        ||
| 
                                 5520 Series  | 
                            
                                 3,580  | 
                        ||
| 
                                 5720 Series  | 
                            
                                 4,000  | 
                        ||
| 
                                 On Egress BEB: Static Data I-SIDs Terminated  | 
                            
                                 5320 Series  | 
                            
                                 800 without boot config flags spbm-node-scaling 1,200 with boot config flags spbm-node-scaling  | 
                        |
| 
                                 5420 Series  | 
                            
                                 800 without boot config flags spbm-node-scaling 1,200 with boot config flags spbm-node-scaling  | 
                        ||
| 
                                 5520 Series  | 
                            
                                 4,000  | 
                        ||
| 
                                 5720 Series  | 
                            
                                 6,000  | 
                        ||
| 
                                 On Egress BEB: Dynamic data I-SIDs + originating BEB pairs terminated  | 
                            
                                 5320 Series  | 
                            
                                 800 without boot config flags spbm-node-scaling 1,200 with boot config flags spbm-node-scaling  | 
                        |
| 
                                 5420 Series  | 
                            
                                 800 without boot config flags spbm-node-scaling 1,200 with boot config flags spbm-node-scaling  | 
                        ||
| 
                                 5520 Series  | 
                            
                                 4,000  | 
                        ||
| 
                                 5720 Series  | 
                            
                                 6,000  | 
                        ||
| 
                                 Maximum number of Layer 3 multicast Data I-SIDs Note: 
                                     
                            Overall limits across all Layer 3 VSNs/GRT  | 
                            
                                 On Ingress BEB: Dynamic and Static originated Data I-SIDs  | 
                            
                                 5320 Series  | 
                            
                                 16- and 24-port models: 250 48- port models: 500  | 
                        
| 
                                 5420 Series  | 
                            
                                 500  | 
                        ||
| 
                                 5520 Series  | 
                            
                                 3,580  | 
                        ||
| 
                                 5720 Series  | 
                            
                                 4,000  | 
                        ||
| 
                                 On Egress BEB: Static Data I-SIDs Terminated  | 
                            
                                 5320 Series  | 
                            
                                 800 without boot config flags spbm-node-scaling 1,200 with boot config flags spbm-node-scaling  | 
                        |
| 
                                 5420 Series  | 
                            
                                 800 without boot config flags spbm-node-scaling 1,200 with boot config flags spbm-node-scaling  | 
                        ||
| 
                                 5520 Series  | 
                            
                                 4,000  | 
                        ||
| 
                                 5720 Series  | 
                            
                                 6,000  | 
                        ||
| 
                                 On Egress BEB: Dynamic data I-SIDs terminated, each I-SID counted after each originating BEB  | 
                            
                                 5320 Series  | 
                            
                                 800 without boot config flags spbm-node-scaling 1,200 with boot config flags spbm-node-scaling  | 
                        |
| 
                                 5420 Series  | 
                            
                                 800 without boot config flags spbm-node-scaling 1,200 with boot config flags spbm-node-scaling  | 
                        ||
| 
                                 5520 Series  | 
                            
                                 4,000  | 
                        ||
| 
                                 5720 Series  | 
                            
                                 6,000  | 
                        ||
The number of I-SIDs supported depends on the number of IS-IS interfaces and adjacencies (NNIs) configured.
The following table shows the number of UNI I-SIDs supported per BEB. UNI I-SIDs are used for Layer 2 VSN, Layer 3 VSN, Transparent-UNI, E-Tree, Switched-UNI and S, G for Multicast.
| 
                                 Number of IS-IS interfaces (NNIs)  | 
                            
                                 Product  | 
                            
                                 I-SIDs with vIST configured on the platform  | 
                            
                                 I-SIDs without vIST configured on the platform  | 
                        
|---|---|---|---|
| 
                                 4  | 
                            
                                 5320 Series  | 
                            
                                 n/a  | 
                            
                                 500  | 
                        
| 
                                 5420 Series  | 
                            
                                 564  | 
                            
                                 564  | 
                        |
| 
                                 5520 Series  | 
                            
                                 4,000  | 
                            
                                 4,000  | 
                        |
| 
                                 5720 Series  | 
                            
                                 4,000  | 
                            
                                 4,000  | 
                        |
| 
                                 6  | 
                            
                                 5320 Series  | 
                            
                                 n/a  | 
                            
                                 500  | 
                        
| 
                                 5420 Series  | 
                            
                                 564  | 
                            
                                 564  | 
                        |
| 
                                 5520 Series  | 
                            
                                 3,500  | 
                            
                                 4,000  | 
                        |
| 
                                 5720 Series  | 
                            
                                 3,500  | 
                            
                                 4,000  | 
                        |
| 
                                 10  | 
                            
                                 5320 Series  | 
                            
                                 n/a  | 
                            
                                 500  | 
                        
| 
                                 5420 Series  | 
                            
                                 564  | 
                            
                                 564  | 
                        |
| 
                                 5520 Series  | 
                            
                                 2,900  | 
                            
                                 4,000  | 
                        |
| 
                                 5720 Series  | 
                            
                                 2,900  | 
                            
                                 4,000  | 
                        |
| 
                                 20  | 
                            
                                 5320 Series  | 
                            
                                 n/a  | 
                            
                                 500  | 
                        
| 
                                 5420 Series  | 
                            
                                 564  | 
                            
                                 564  | 
                        |
| 
                                 5520 Series  | 
                            
                                 2,000  | 
                            
                                 4,000  | 
                        |
| 
                                 5720 Series  | 
                            
                                 2,000  | 
                            
                                 4,000  | 
                        |
| 
                                 48  | 
                            
                                 5320 Series  | 
                            
                                 n/a  | 
                            
                                 500  | 
                        
| 
                                 5420 Series  | 
                            
                                 564  | 
                            
                                 564  | 
                        |
| 
                                 5520 Series  | 
                            
                                 1,000  | 
                            
                                 2,000  | 
                        |
| 
                                 5720 Series  | 
                            
                                 1,000  | 
                            
                                 2,000  | 
                        |
| 
                                 72  | 
                            
                                 5320 Series  | 
                            
                                 n/a  | 
                            
                                 n/a  | 
                        
| 
                                 5420 Series  | 
                            
                                 n/a  | 
                            
                                 n/a  | 
                        |
| 
                                 5520 Series  | 
                            
                                 750  | 
                            
                                 1,500  | 
                        |
| 
                                 5720 Series  | 
                            
                                 750  | 
                            
                                 1,500  | 
                        |
| 
                                 100  | 
                            
                                 5320 Series  | 
                            
                                 n/a  | 
                            
                                 n/a  | 
                        
| 
                                 5420 Series  | 
                            
                                 n/a  | 
                            
                                 n/a  | 
                        |
| 
                                 5520 Series  | 
                            
                                 550  | 
                            
                                 1,100  | 
                        |
| 
                                 5720 Series  | 
                            
                                 550  | 
                            
                                 1,100  | 
                        |
| 
                                 128  | 
                            
                                 5320 Series  | 
                            
                                 n/a  | 
                            
                                 n/a  | 
                        
| 
                                 5420 Series  | 
                            
                                 n/a  | 
                            
                                 n/a  | 
                        |
| 
                                 5520 Series  | 
                            
                                 450  | 
                            
                                 900  | 
                        |
| 
                                 5720 Series  | 
                            
                                 450  | 
                            
                                 900  | 
                        |
| 
                                 250  | 
                            
                                 5320 Series  | 
                            
                                 n/a  | 
                            
                                 n/a  | 
                        
| 
                                 5420 Series  | 
                            
                                 n/a  | 
                            
                                 n/a  | 
                        |
| 
                                 5520 Series  | 
                            
                                 n/a  | 
                            
                                 n/a  | 
                        |
| 
                                 5720 Series  | 
                            
                                 n/a  | 
                            
                                 n/a  | 
                        
BEBs running VOSS 5.0 can advertise routes into IS-IS with the metric type as external. They can also correctly interpret route advertisements with metric type external received via IS-IS. In an SPB network with a mix of products running different versions of software releases, you must take care to ensure that turning on the ability to use metric-type external does not cause unintended loss of connectivity.
Note the following before turning on IS-IS external metric if the SPB network has switches running a release prior to VOSS 5.0:
There are no special release or product type implications if the switch does not have IP Shortcuts or Layer 3 VSN enabled. For example, this applies to Layer 2 only BEBs and BCBs.
There are no special release or product type implications if the Layer 3 VSN in which routes are being advertised with a metric-type of external is not configured on the switch.
If a switch running a VOSS release that is prior to VOSS 5.0 but VOSS 4.2.1 or later, it will treat all IS-IS routes as having metric-type internal, regardless of the metric-type (internal or external) used by the advertising BEB in its route advertisement.
Switches running VSP 9000 Series release 4.1.0.0 or later will treat all IS-IS routes as having metric-type internal, regardless of the metric-type (internal or external) used by the advertising BEB in its route advertisement.
Switches running VOSS releases prior to 4.2.1.0 might not correctly install IS-IS routes in a Layer 3 VSN if any routes advertised with metric-type external are advertised in that Layer 3 VSN by other BEBs in the network. Layer 3 VSNs in which there are no routes with an external metric-type will not be impacted. Similar note applies to the GRT.
Switches running VSP 9000 Series releases prior to 4.1.0.0 might not correctly install IS-IS routes in a Layer 3 VSN if any routes advertised with metric-type external are advertised in that Layer 3 VSN by other BEBs in the network. Layer 3 VSNs in which there are no routes with an external metric-type will not be impacted. Similar note applies to GRT.
Switches running any ERS 8800 release might not correctly install IS-IS routes in a Layer 3 VSN if any routes advertised with metric-type external are advertised in that Layer 3 VSN by other BEBs in the network. Layer 3 VSNs in which there are no routes with an external metric-type will not be impacted. Similar note applies to GRT.