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 as boundary node

2

5720 Series as boundary node

2

7520 Series

2

7720 Series

2

Number of B-VIDs

5320 Series

2

5420 Series

2

5520 Series

2

5720 Series

2

7520 Series

2

7720 Series

2

Maximum number of Physical and Logical (Fabric Extend) NNI interfaces/adjacencies (Home and Remote area total when operating as Boundary Node)

5320 Series

64

5420 Series

50

5520 Series

128

5720 Series

128

7520 Series

255

7720 Series

255

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

7520 Series

See Number of I-SIDs supported

7720 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

7520 Series

4,000

7720 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

7520 Series

56 (up to 125 with channelization)

7720 Series

32 (up to 125 with channelization)

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

7520 Series

100

7720 Series

100

Maximum number of routed PVLANs/E-Trees

5320 Series

10

5420 Series

10

5520 Series

10

5720 Series

100

7520 Series

50

7720 Series

50

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

7520 Series

256

7720 Series

256

Maximum number of FA I-SID/VLAN assignments per port

5320 Series

94

5420 Series

94

5520 Series

94

5720 Series

94

7520 Series

94

7720 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

7520 Series

50,000

7720 Series

50,000

ISW switches in a Fabric Attach Ring

128

Table 2. Multidimensional Fabric node scale

Device

Node scaling1

SPBM nodes2

Total unicast BMACs3

Switched UNI endpoints 4

Multicast Data I-SIDs5

Ingress BEB

Egress BEB

5320 Series

Enabled

500

500

400

16- and 24-port models: 250

48-port models: 500

1,200

Disabled

350

350

700/800

16- and 24-port models: 250

48-port models: 500

800

5420 Series

Enabled

500 without vIST

340 with vIST

500 without vIST

340 with vIST

400

500

1,200

Disabled

350 without vIST

340 with vIST

350 without vIST

340 with vIST

700/800

500

800

5520 Series

500/800

800

2,700

2,700

4,000

5720 Series

500/1,000

2,000

4,850

4,000

6,000

7520 Series

500/1,000

2,000

12,000

4,000

6,000

7720 Series

500/1,000

2,000

12,000

4,000

6,000

  1. Node scaling—refers to the enabled state of the boot configuration flags spbm-node-scaling command, if applicable. For 5320 Series and 5420 Series using Fabric Extend or vIST, it is a best practice to enable this command.
  2. SPBM nodes—refers to the number of supported SPBM enabled nodes, both BEB and BCB. When different, the number is formatted as per area/total per device. For 5420 Series, this number is impacted by vIST.
  3. Total unicast BMACs—refers to the total number, both virtual and physical, this node can share services with. This number includes Layer 2 VSNs, Layer 3 VSNs, E-TREE, Multicast, and Transparent Port UNI. For 5420 Series, this number is impacted by vIST.
  4. Switched UNI endpoints—refers to the maximum local tagged and untagged endpoints, either manual, RADIUS, or FA-assigned. When different, the number is formatted based on the configuration of the boot config flags macsec command: enabled/disabled.
  5. Multicast Data I-SIDs—refers to the maximum Layer 2 or Layer 3, dynamic and static originated data I-SIDs. The overall limits are across all locally configured Layer 2 VSNs

The following table provides numbers for 5320 Series and 5420 Series only, to reflect the impact of the boot configuration flags spbm-node-scaling command.

Table 3. Maximum remote multicast sender nodes and local I-SIDs

Device

Node scaling1

Total remote multicast sender nodes2 Total local I-SIDs3

5320 Series

Enabled

200

16- and 24-port models: 274

48-port models: 500

Disabled

150

16- and 24-port models: 274

48-port models: 564

5420 Series

Enabled

200 500

Disabled

150 564
  1. Node scaling—refers to the enabled state of the boot configuration flags spbm-node-scaling command. For 5320 Series and 5420 Series using Fabric Extend or vIST, it is a best practice to enable this command.
  2. Total remote multicast sender nodes—refers to the total number of nodes that send IP multicast streams that the local BEB receives. This space is shared with unicast BMACs in the preceding table. Documented limits are individual in isolation; introducing vIST clusters or nodes that advertise IP multicast streams decreases the total number of physical nodes in an area.
  3. Total local I-SIDs— refers to the total for Layer 2, Layer 3, and Multicast.