show vsf topology detail

Syntax

show vsf topology detail

Description

This command displays forwarding path information (unidestination and multidestination flood path information). The unidestination forwarding takes the shortest path in terms of hop counts to reach destination member. The command output provides the egress VSF link used to send traffic along the shortest path computed. The multidestination path provides the complete flood path taken along the VSF stack for the multidestination traffic ingressing VSF stack or sourced at any VSF member.

Example output 

switch# show vsf topology detail

 Uni-destination Link Path: 

 VSF Member ID  1    2    3    4    5    6    7    8   
 ------------- ---- ---- ---- ---- ---- ---- ---- ----
 1              -    1    1    1    1    1    1    1
 2              1    -    2    2    2    2    2    2
 3              1    1    -    2    2    2    2    2
 4              1    1    1    -    2    2    2    2
 5              1    1    1    1    -    2    2    2
 6              1    1    1    1    1    -    2    2
 7              2    2    2    2    2    2    -    2
 8              2    2    2    2    2    2    1    -
In the preceding example, the unidestination traffic from Member ID 1 to Member ID 8 egresses through VSF link 1. Member ID 2 to Member ID 8 egresses through VSF link 2. Member ID 3 to Member ID 8 egresses through VSF link 3, and so on. 
 Multi-destination Path:

 VSF Member ID   Path
 -------------  ------
 1               2-3-4-5-6-8-7
 2               1, 3-4-5-6-8-7
 3               2-1, 4-5-6-8-7
 4               3-2-1, 5-6-8-7
 5               4-3-2-1, 6-8-7
 6               5-4-3-2-1, 8-7
 7               8-6-5-4-3-2-1
 8               7, 6-5-4-3-2-1
In the preceding example, the multidestination traffic:

  • ingressing at Member ID 1 will be relayed to Member ID 2, Member ID 2 will further relay to Member ID 3, Member ID 3 will further relay to Member ID 4, Member ID 4 to Member ID 5, Member ID 5 to Member ID 6, Member ID 6 to Member ID 8, and Member ID 8 to Member ID 7, which will not relay further. All the receiving Members will consume multidestination traffic before relaying further.

  • ingressing or sourced at Member 2 will take two forwarding paths:

    • Relay to Member ID 1. Member ID 1 will consume and not relay further.

    • Relay to Member ID 3 which will further relay to Member ID 4, Member ID 4 to Member ID 5, Member ID 5 to Member ID 6, Member ID 6 to Member ID 8, and Member ID 8 to Member ID 7, which will not relay further