How to Add Additional Physical NICs to XenServer

Instructions

Complete the following procedure to get the NIC to show in XenCenter:

1. From the XenServer Command Line Interface (CLI), issue the following command:
   xe pif-list
2. Press Enter.
   Note: If you have more than one XenServer in the pool, you must issue the xe host-list command to list all the XenServer hosts and write down the Universally Unique Identifier (UUID) of the host that you added the new NIC, then issue command xe pif-list host-uuid=[uuid of the XenServer host]
3. The preceding command lists all the physical NICs of that XenServer. If you do not see the additional NIC, you must scan for new physical interface(s) on a XenServer and issue this command:
   xe pif-scan host-uuid=[uuid of the XenServer host]
4. Press Enter.
5. Use xe pif-list again and you can see the new NIC.
6. If you see the device of the new NIC with similar to this __tmp206888048,  you must remove it and introduce so it can recognize in the correct way such as ethX.
   xe pif-forget uuid=[uuid of __tmp206888048 that you want to forget]
   xe pif-list,  you won’t see __tmp206888048 anymore.
7. Introduce the additional physical NIC to the XenServer so it can recognize it from the XenCenter.
   ifconfig –a
8. Press Enter.
   Similar to the following output is generated:

   ifconfig:
   __tmp206888048 Link encap:Ethernet HWaddr 00:15:17:6B:6A:31
   UP BROADCAST MULTICAST MTU:1500 Metric:1
   RX packets:0 errors:0 dropped:0 overruns:0 frame:0
   TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
   collisions:0 txqueuelen:1000
   RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) 

   Note: The __tmp206888048 is still there with the MAC address 00:15:17:6B:6A:31. You must write down the MAC address 00:15:17:6B:6A:31 so later, you can introduce that MAC address for the next available NIC device such as ethX.
9. Now you can introduce the new physical NIC(s) to the XenServer. xe pif-introduce host-uuid=[uuid of the XenServer host] device=[machine-readable name of the interface (for example, eth3)] mac=00:15:17:6B:6A:31
10. Press Enter. The command returns a UUID, for example: 83750d2d-dd36-787c-da1c-951d7afc2cf0
11. Plug that new UUID 83750d2d-dd36-787c-da1c-951d7afc2cf0
    xe pif-plug uuid=83750d2d-dd36-787c-da1c-951d7afc2cf0
    xe pif-list to see the new PIF
12. Open XenCenter and the new physical NIC(s) are displayed           http://support.citrix.com/article/CTX121615