ASIC to port mapping

Just a couple of commands to show the ASIC/port mapping on most cisco switches.

show interfaces capabilities module

Is used on smaller switches e.g. 3750

m00nie-C3750#show platform pm if-numbers

interface gid gpn lpn port slot unit slun port-type lpn-idb gpn-idb

———————————————————————-

Gi1/0/1 1 1 1 1/3 1 1 1 local Yes Yes

Gi1/0/2 2 2 2 1/0 1 2 2 local Yes Yes

Gi1/0/3 3 3 3 1/1 1 3 3 local Yes Yes

Gi1/0/4 4 4 4 1/2 1 4 4 local Yes Yes

Gi1/0/5 5 5 5 0/2 1 5 5 local Yes Yes

Gi1/0/6 6 6 6 0/3 1 6 6 local Yes Yes

Gi1/0/7 7 7 7 0/0 1 7 7 local Yes Yes

Gi1/0/8 8 8 8 0/1 1 8 8 local Yes Yes

Gi1/0/9 9 9 9 3/3 1 9 9 local Yes Yes

Gi1/0/10 10 10 10 3/0 1 10 10 local Yes Yes

Gi1/0/11 11 11 11 3/1 1 11 11 local Yes Yes

Gi1/0/12 12 12 12 3/2 1 12 12 local Yes Yes

Is this out the ASIC used by the port is under the “port” column (doesnt display very well here). So for example Gi1/0/1 uses ASIC 1 port 3 and Gi1/0/10 uses ASIC 3 port 0.

On 6500s the command is

show interfaces capabilities module

E.g

m00nie-C6509#show interfaces capabilities module 1

GigabitEthernet1/1

Dot1x: yes

Model: WS-X6724-SFP

Type: 1000BaseSX

Speed: 1000

Duplex: full

Trunk encap. type: 802.1Q,ISL

Trunk mode: on,off,desirable,nonegotiate

Channel: yes

Broadcast suppression: percentage(0-100)

Flowcontrol: rx-(off,on,desired),tx-(off,on,desired)

Membership: static

Fast Start: yes

QOS scheduling: rx-(1q8t), tx-(1p3q8t)

CoS rewrite: yes

ToS rewrite: yes

Inline power: no

SPAN: source/destination

UDLD yes

Link Debounce: yes

Link Debounce Time: yes

Ports on ASIC: 1-12

Port-Security: yes

The output here is more obvious with the “Ports on ASIC” showing the actual port numbers used/shared by the ASIC.

m00nie πŸ™‚

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