02-21-2012 06:47 AM - edited 03-01-2019 05:55 AM
A 'single home fex' is a Nexus 2000 that only has uplinks to a single 5k. Typically you would put the uplinks from the 2k->5k in a port-channel for better performance and redundancy.
Step 1: switch(config)# feature fex <---- turn on feature
Step 2: Next we must create a fex number to allow association. To see which ones fex numbers are already in use. Check the following:
24.09.5010B.1# sh fex FEX FEX FEX FEX Number Description State Model Serial ------------------------------------------------------------------------ 100 FEX0100 Online N2K-C2232PP-10GE SSI14100EHK 102 FEX0102 Online N2K-C2148T-1GE FOX1344G3TG
24.09.5010B.1# sh run fex !Command: show running-config fex !Time: Tue Feb 21 09:24:45 2012 version 5.1(3)N1(1a) feature fex fex 100 pinning max-links 1 description "FEX0100" fex 101 pinning max-links 1 description "FEX0101" serial JAF1309AEQP diagnostic bootup level extra fex 102 pinning max-links 1 description "FEX0102"
Step 3: Create a fex number:
Step 4: Next we need to see which ports we are discovering fexes on, that we want to assign. If you see multiple ports with the same serial #, this is the same fex and these need to be grouped together in a port-channel.
Fabric Fabric Fex FEX Fex Port Port State Uplink Model Serial --------------------------------------------------------------- --- Eth1/8 Discovered 1 N2K-C2148T-1GE ABCDEFGHIJ --- Eth1/9 Discovered 1 N2K-C2148T-1GE ABCDEFGHIJ
Step 5: Assign those ports to a port-channel, and setup the association.
2011 Oct 29 13:18:57 24.09.5010A.2 %SATCTRL-FEX100-2-SOHMS_ENV_ERROR: FEX-100 Module 1: Check environment alarms. 2011 Oct 29 13:19:12 24.09.5010A.2 %PFMA-2-FEX_STATUS: Fex 100 is online 2011 Oct 29 13:19:12 24.09.5010A.2 %NOHMS-2-NOHMS_ENV_FEX_ONLINE: FEX-100 On-line 2011 Oct 29 13:19:14 24.09.5010A.2 %PFMA-2-FEX_STATUS: Fex 100 is online
Step 6: Check the fex status
switch(config-if)# sh fex FEX FEX FEX FEX Number Description State Model Serial ------------------------------------------------------------------------ 100 FEX0100 Online N2K-C2148T-1GE XXXXXXXXXXX
24.09.5010A.2# sh int status | eg "Eth100" Eth100/1/1 -- notconnec 1 full 1000 -- Eth100/1/2 -- notconnec 1 full 1000 -- Eth100/1/3 -- notconnec 1 full 1000 -- Eth100/1/4 -- notconnec 1 full 1000 -- Eth100/1/5 -- notconnec 1 full 1000 -- Eth100/1/6 -- notconnec 1 full 1000 -- Eth100/1/7 -- notconnec 1 full 1000 -- Eth100/1/8 -- notconnec 1 full 1000 -- Eth100/1/9 -- notconnec 1 full 1000 -- Eth100/1/10 -- notconnec 1 full 1000 -- Eth100/1/11 -- notconnec 1 full 1000 -- Eth100/1/12 -- notconnec 1 full 1000 -- Eth100/1/13 -- notconnec 1 full 1000 -- Eth100/1/14 -- notconnec 1 full 1000 -- Eth100/1/15 -- notconnec 1 full 1000 -- Eth100/1/16 -- notconnec 1 full 1000 -- Eth100/1/17 -- notconnec 1 full 1000 -- Eth100/1/18 -- notconnec 1 full 1000 -- Eth100/1/19 -- notconnec 1 full 1000 -- Eth100/1/20 -- notconnec 1 full 1000 -- Eth100/1/21 -- notconnec 1 full 1000 -- Eth100/1/22 -- notconnec 1 full 1000 --
Step 7: Check the port-channel status
switch(config-if)# sh port-channel summary Flags: D - Down P - Up in port-channel (members) <---you want to see P as below I - Individual H - Hot-standby (LACP only) s - Suspended r - Module-removed S - Switched R - Routed U - Up (port-channel) -------------------------------------------------------------------------------- Group Port- Type Protocol Member Ports Channel -------------------------------------------------------------------------------- 100 Po100(SU) Eth NONE Eth1/8(P) Eth1/9(P) <---- Nexus 5k - 2k does not support LACP so the protocol will show 'none'
switch(config-if)# sh run int po100 membership !Command: show running-config interface port-channel100 membership !Time: Sat Oct 29 13:35:34 2011 version 5.0(3)N2(2) interface port-channel100 switchport mode fex-fabric fex associate 100 interface Ethernet1/8 switchport mode fex-fabric fex associate 100 channel-group 100 interface Ethernet1/9 switchport mode fex-fabric fex associate 100 channel-group 100
switch(config-if)# sh run int po100 membership !Command: show running-config interface port-channel100 membership !Time: Sat Oct 29 13:35:34 2011 version 5.0(3)N2(2) interface port-channel100 switchport mode fex-fabric fex associate 100 <-------------------- fex # has to match on both 5ks vpc 100 <------------------------------ vpc # has to match on both 5ks interface Ethernet1/8 switchport mode fex-fabric fex associate 100 channel-group 100 interface Ethernet1/9 switchport mode fex-fabric fex associate 100 channel-group 100
This is in a nice format and very concise.
Thank you,
Tony.
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