Fabric Scaling

This section lists the fabric scaling information.

Table 1. Fabric Maximums
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 with no spbm-node-scaling bootflag 500 with spbm-node-scaling bootflag
	5420 Series	350 with no spbm-node-scaling bootflag 500 with spbm-node-scaling bootflag
	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 with no spbm-node-scaling 500 with spbm-node-scaling
	5420 Series	350 with no spbm-node-scaling 500 with 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	See Number of I-SIDs supported
	5420 Series	See Number of I-SIDs supported
	5520 Series	See Number of I-SIDs supported
	5720 Series	See Number of I-SIDs supported
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.
	5420 Series	See Maximum number of Switched UNI Endpoints.
	5520 Series	See Maximum number of Switched UNI Endpoints.
	5720 Series	See Maximum number of Switched UNI Endpoints.
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	See Maximum number of SPB multicast Data I-SIDs
	5420 Series	See Maximum number of SPB multicast Data I-SIDs
	5520 Series	See Maximum number of SPB multicast Data I-SIDs See Number of I-SIDs supported
	5720 Series	See Maximum number of SPB multicast Data I-SIDs See Number of I-SIDs supported
Maximum number of SPB Layer 3 multicast Data I-SIDs	5320 Series	See Maximum number of SPB multicast Data I-SIDs
	5420 Series	See Maximum number of SPB multicast Data I-SIDs
	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. See Maximum number of SPB multicast Data I-SIDs
	5720 Series	See Maximum number of SPB multicast Data I-SIDs
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

Table 2. Maximum number of Switched UNI Endpoints (C-VID or untagged port bindings)
Product	Total Number of Switched UNI Endpoints	Maximum number supported (with and without vIST)
5320 Series Note: Resources are shared with NEAP clients.	800	MACsec bootflag: NO spbm-node-scaling: NO Platform VLAN present: N/A
	800	MACsec bootflag: YES spbm-node-scaling: NO Platform VLAN present: NO
	700	With MACsec bootflag: YES spbm-node-scaling: NO Platform VLAN present: YES
	400	MACsec bootflag: N/A spbm-node-scaling: YES Platform VLAN present: N/A
5420 Series	800	MACsec bootflag: NO
	700	VLAN-based with MACsec bootflag
	400	spbm-node-scaling bootflag: YES
5520 Series	4,900	N/A
5720 Series	12,000	N/A

Table 3. Maximum number of SPB multicast Data I-SIDs
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	3580
		5720 Series	4000
	On Egress BEB: Static Data I-SIDs Terminated	5320 Series	800 without spbm-node-scaling bootflag 1200 with spbm-node-scaling bootflag
		5420 Series	800 without spbm-node-scaling bootflag 1200 with spbm-node-scaling bootflag
		5520 Series	4000
		5720 Series	6000
	On Egress BEB: Dynamic data I-SIDs + originating BEB pairs terminated	5320 Series	800 without spbm-node-scaling bootflag 1200 with spbm-node-scaling bootflag
		5420 Series	800 without spbm-node-scaling bootflag 1200 with spbm-node-scaling bootflag
		5520 Series	4000
		5720 Series	6000
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	3580
		5720 Series	4000
	On Egress BEB: Static Data I-SIDs Terminated	5320 Series	800 without spbm-node-scaling bootflag 1200 with spbm-node-scaling bootflag
		5420 Series	800 without spbm-node-scaling bootflag 1200 with spbm-node-scaling bootflag
		5520 Series	4000
		5720 Series	6000
	On Egress BEB: Dynamic data I-SIDs terminated, each I-SID counted after each originating BEB	5320 Series	800 without spbm-node-scaling bootflag 1200 with spbm-node-scaling bootflag
		5420 Series	800 without spbm-node-scaling bootflag 1200 with spbm-node-scaling bootflag
		5520 Series	4000
		5720 Series	6000

Number of I-SIDs Supported for the Number of Configured IS-IS Interfaces and Adjacencies (NNIs)

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

Interoperability Considerations for IS-IS External Metric

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.