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 500 with spbm-node-scaling
	5420 Series	350 with no spbm-node-scaling 500 with 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 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 Switched UNI Endpoints (C-VID plus port configurations)	5320 Series	800 no Macsec bootflag/ 700 Platform Vlan Based w MacSec bootflag/400 w spbm-node-scaling bootflag ;
	5420 Series	800 without MACsec bootflag 700 platform VLAN-based with MACsec bootflag 400 with spbm-node-scaling bootflag
	5520 Series	4,900
	5720 Series	12,000
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 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 UNI I-SIDs	5320 Series	500 originated 800 terminated
	5420 Series	500 originated 800 terminated
	5520 Series	See Number of I-SIDs supported
	5720 Series	See Number of I-SIDs supported
Maximum number of SPB Layer 3 multicast UNI I-SIDs	5320 Series	500 originated 800 terminated without spbm-node-scaling 1,200 with spbm-node-scaling
	5420 Series	500 originated 800 terminated without spbm-node-scaling 1,200 with spbm-node-scaling
	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	4000 originated 6000 terminated
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

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.