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