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 regions	5520 Series	1
	VSP 4450 Series	1
	VSP 4900 Series	1
	VSP 7200 Series	1
	VSP 7400 Series	1
	VSP 8000 Series	1
	XA1400 Series	1
Number of B-VIDs	5520 Series	2
	VSP 4450 Series	2
	VSP 4900 Series	2
	VSP 7200 Series	2
	VSP 7400 Series	2
	VSP 8000 Series	2
	XA1400 Series	2
Maximum number of Physical and Logical (Fabric Extend) NNI interfaces/adjacencies	5520 Series	128
	VSP 4450 Series	255
	VSP 4900 Series	255 without IPsec 64 with IPsec, using Fabric IPsec Gateway
	VSP 7200 Series	255
	VSP 7400 Series	255 without IPsec 64 with IPsec, using Fabric IPsec Gateway
	VSP 8000 Series	255
	XA1400 Series	255 without IPsec 64 with IPsec
SPBM enabled nodes per area (BEB + BCB)	5520 Series	800
	VSP 4450 Series	550
	VSP 4900 Series	800
	VSP 7200 Series	800
	VSP 7400 Series	2,000
	VSP 8000 Series	800
	XA1400 Series	550
Number of BEBs this node can share services with (Layer 2 VSNs, Layer 3 VSNs, E-Tree, Multicast, Transparent Port UNI). Note: vIST clusters are counted as 3 nodes. Each Fabric Extend IS-IS adjacency or VXLAN remote VTEP reduces this number by 1.	5520 Series	800
	VSP 4450 Series	500
	VSP 4900 Series	500
	VSP 7200 Series	500
	VSP 7400 Series	2,000
	VSP 8000 Series	500
	XA1400 Series	n/a
Maximum number of vIST/IST clusters this node can share I-SIDs with	5520 Series	800
	VSP 4450 Series	500
	VSP 4900 Series	330
	VSP 7200 Series	330
	VSP 7400 Series	1,330
	VSP 8000 Series	330
	XA1400 Series	n/a
Layer 2 MAC table size (with SPBM)	5520 Series	40,960
	VSP 4450 Series	16,000
	VSP 4900 Series	40,000
	VSP 7200 Series	112,000
	VSP 7400 Series	80,000
	VSP 8000 Series	112,000
	XA1400 Series	2,000 for XA1440 4,000 for XA1480
I-SIDs supported	5520 Series	See Number of I-SIDs supported
	VSP 4450 Series	See Number of I-SIDs supported
	VSP 4900 Series	See Number of I-SIDs supported
	VSP 7200 Series	See Number of I-SIDs supported
	VSP 7400 Series	See Number of I-SIDs supported
	VSP 8000 Series	See Number of I-SIDs supported
	XA1400 Series	See Number of I-SIDs supported
Maximum number of Layer 2 VSNs per switch	5520 Series	3,580
	VSP 4450 Series	1,000
	VSP 4900 Series	4,059
	VSP 7200 Series	4,059
	VSP 7400 Series	4,000
	VSP 8000 Series	4,059
	XA1400 Series	124
Maximum number of Switched UNI I-SIDs per switch	5520 Series	See Number of I-SIDs supported
	VSP 4450 Series	See Number of I-SIDs supported
	VSP 4900 Series	See Number of I-SIDs supported
	VSP 7200 Series	See Number of I-SIDs supported
	VSP 7400 Series	See Number of I-SIDs supported
	VSP 8000 Series	See Number of I-SIDs supported
	XA1400 Series	n/a
Maximum number of Transparent Port UNIs per switch	5520 Series	48-port models: 48 24-port models: 24
	VSP 4450 Series	48
	VSP 4900 Series	52
	VSP 7200 Series	54 (up to 72 with channelization)
	VSP 7400 Series	VSP 7432CQ = 32 (up to 125 with channelization) configured in Full Port mode VSP 7400-48Y = 56 configured in Full Port mode
	VSP 8000 Series	84 (up to 96 with channelization)
	XA1400 Series	n/a
Maximum number of E-Tree PVLAN UNIs per switch	5520 Series	200
	VSP 4450 Series	200
	VSP 4900 Series	200
	VSP 7200 Series	200
	VSP 7400 Series	200
	VSP 8000 Series	VSP 8404C = 400 Other VSP 8000 Series platforms = 200
	XA1400 Series	n/a
Maximum number of Layer 3 VSNs per switch See VRF Scaling.	5520 Series	256 including mgmt VRF and GRT
	VSP 4450 Series	128 including mgmt VRF and GRT
	VSP 4900 Series	256 including mgmt VRF and GRT
	VSP 7200 Series	256 including mgmt VRF and GRT
	VSP 7400 Series	256 including mgmt VRF and GRT
	VSP 8000 Series	256 including mgmt VRF and GRT
	XA1400 Series	23
Maximum number of SPB Layer 2 multicast UNI I-SIDs	5520 Series	See Number of I-SIDs supported
	VSP 4450 Series	See Number of I-SIDs supported
	VSP 4900 Series	See Number of I-SIDs supported
	VSP 7200 Series	See Number of I-SIDs supported
	VSP 7400 Series	See Number of I-SIDs supported
	VSP 8000 Series	See Number of I-SIDs supported
	XA1400 Series	n/a
Maximum number of SPB Layer 3 multicast UNI 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.
	VSP 4450 Series	Maximum 1,000 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.
	VSP 4900 Series	Maximum 6,000 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.
	VSP 7200 Series	Maximum 6,000 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.
	VSP 7400 Series	Maximum 6,000 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.
	VSP 8000 Series	Maximum 6,000 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.
	XA1400 Series	n/a
Maximum number of FA ISID/VLAN assignments per port	5520 Series	94
	VSP 4450 Series	94
	VSP 4900 Series	94
	VSP 7200 Series	94
	VSP 7400 Series	94
	VSP 8000 Series	94
	XA1400 Series	n/a
Maximum number of IP multicast S,Gs when operating as a BCB	5520 Series	16,000
	VSP 4450 Series	1,000
	VSP 4900 Series	16,000
	VSP 7200 Series	16,000
	VSP 7400 Series	50,000
	VSP 8000 Series	16,000
	XA1400 Series	2,000

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	5520 Series	4,000	4,000
	VSP 4450 Series	1,000	1,000
	VSP 4900 Series	4,000	4,000
	VSP 7200 Series	4,000	4,000
	VSP 7400 Series	4,000	4,000
	VSP 8000 Series	4,000	4,000
	XA1400 Series	n/a	150
6	5520 Series	3,500	4,000
	VSP 4450 Series	1,000	1,000
	VSP 4900 Series	3,500	4,000
	VSP 7200 Series	3,500	4,000
	VSP 7400 Series	3,500	4,000
	VSP 8000 Series	3,500	4,000
	XA1400 Series	n/a	150
10	5520 Series	2,900	4,000
	VSP 4450 Series	650	1,000
	VSP 4900 Series	2,900	4,000
	VSP 7200 Series	2,900	4,000
	VSP 7400 Series	2,900	4,000
	VSP 8000 Series	2,900	4,000
	XA1400 Series	n/a	150
20	5520 Series	2,000	4,000
	VSP 4450 Series	350	700
	VSP 4900 Series	2,000	4,000
	VSP 7200 Series	2,000	4,000
	VSP 7400 Series	2,000	4,000
	VSP 8000 Series	2,000	4,000
	XA1400 Series	n/a	150
48	5520 Series	1,000	2,000
	VSP 4450 Series	n/a	n/a
	VSP 4900 Series	1,000	2,000
	VSP 7200 Series	1,000	2,000
	VSP 7400 Series	1,000	2,000
	VSP 8000 Series	1,000	2,000
	XA1400 Series	n/a	150
72	5520 Series	750	1,500
	VSP 4450 Series	n/a	n/a
	VSP 4900 Series	750	1,500
	VSP 7200 Series	750	1,500
	VSP 7400 Series	750	1,500
	VSP 8000 Series	750	1,500
	XA1400 Series	n/a	150
100	5520 Series	550	1,100
	VSP 4450 Series	n/a	n/a
	VSP 4900 Series	550	1,100
	VSP 7200 Series	550	1,100
	VSP 7400 Series	550	1,100
	VSP 8000 Series	550	1,100
	XA1400 Series	n/a	150
128	5520 Series	450	900
	VSP 4450 Series	n/a	n/a
	VSP 4900 Series	450	900
	VSP 7200 Series	450	900
	VSP 7400 Series	450	900
	VSP 8000 Series	450	900
	XA1400 Series	n/a	150
250	5520 Series	n/a	n/a
	VSP 4450 Series	n/a	n/a
	VSP 4900 Series	240	480
	VSP 7200 Series	240	480
	VSP 7400 Series	240	480
	VSP 8000 Series	240	480
	XA1400 Series	n/a	150

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.