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| Sun Ethernet Fabric Operating System Uplink Port Trailing Administration Guide

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### Verify the Uplink Port Trailing Feature

1. Ping from Host-2 to a tagged interface on Host-1.

   The ping should go through.

2. On ToR72p-1, check that the bond MAC address is learned on port channel 12.

       ToR72p-1 SEFOS# show mac-address-table

       Vlan    Mac Address         Type     Ports
       ----    -----------         ----     -----
       1       00:14:4f:6c:63:4f   Learnt   po13
       1       00:14:4f:6c:66:0f   Learnt   po12
       1       90:e2:ba:79:83:94   Learnt   Ex0/21
       300     00:1b:21:66:48:ec   Learnt   po12 <---------- in Bold
       300     90:e2:ba:79:83:94   Learnt   Ex0/21

       Total Mac Addresses displayed: 5

3. While the ping is going through, shut down the port connecting to NEM24p-0 on ToR72p-1.

   The ping should still go through.

4. Verify the Uplink Port Trailing status on NEM24p-0.

   Since the uplink is down, the downlink will also be shut down by the feature.

       NEM24p-0 SEFOS# show uplink-trailing group 10 detail
       Uplink Trailing Group 10
       Description:     Uplink to ToR72p-1 and downlink to Host-1
               Admin Status:            Enabled
               Status:                  Down
       Link State Change: Up   4       Down    4

       Port             Type   Status
       Ex0/1        uplink      Down
       Ex0/18       downlink    Down

5. Show the bonding status of the standby interface (`eth6`).

       [Host-2]# cat /proc/net/bonding/bond0
       Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

       Bonding Mode: fault-tolerance (active-backup)
       Primary Slave: eth7 (primary_reselect always)
       Currently Active Slave: eth6
       MII Status: up
       MII Polling Interval (ms): 100
       Up Delay (ms): 0
       Down Delay (ms): 0

       Slave Interface: eth6
       MII Status: up
       Speed: 10000 Mbps
       Duplex: full
       Link Failure Count: 5
       Permanent HW addr: 00:1b:21:66:48:ec
       Slave queue ID: 0

       Slave Interface: eth7
       MII Status: down
       Speed: Unknown
       Duplex: Unknown
       Link Failure Count: 13
       Permanent HW addr: 00:1b:21:66:48:ed
       Slave queue ID: 0
       [root@nsn165-82 bonding]#

6. Check the Uplink Port Trailing configuration on NEM24p-1

       NEM24p-1 SEFOS# show uplink-trailing group detail
       Uplink Trailing Group 20
       Description:     Uplink-trailing between NEM24p-1 & ToR72p-1
               Admin Status:            Enabled
               Status:                  Up
       Link State Change: Up   1       Down    0

       Port             Type   Status
       Ex0/1        uplink      Up
       Ex0/18       downlink    Up

7. On ToR72p-1, check that the bond MAC address is learned on port channel 13.

       ToR72p-1 SEFOS# show mac-address-table

       Vlan    Mac Address         Type     Ports
       ----    -----------         ----     -----
       1       00:14:4f:6c:63:4f   Learnt   po13
       1       90:e2:ba:79:83:94   Learnt   Ex0/21
       300     00:1b:21:66:48:ec   Learnt   po13
       300     90:e2:ba:79:83:94   Learnt   Ex0/21
       301     00:1b:21:66:48:ec   Learnt   po13

       Total Mac Addresses displayed: 5

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