Disable LLDP on FEX interface
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06-14-2019 01:55 AM
HI, have 2 Nexus 5k (NX-OS version 5.2(1)N1(3)) in vPC domain and several dual-homed FEX (switch-profile, conf sync)...
LLDP is enable globally by feature lldp, tried to disable lldp on fex interface, but there is no command under conf sync mode to do it:
NX5548-1# conf sync Enter configuration commands, one per line. End with CNTL/Z. NX5548-1(config-sync)# switch-profile card Switch-Profile started, Profile ID is 1 NX5548-1(config-sync-sp)# interface e101/1/1 NX5548-1(config-sync-sp-if)# no l? lacp Configure LACP parameters link Configure link load-interval Specify interval for load calculation for an interface NX5548-1(config-sync-sp-if)#
So there's no way to disable LLDP on FEX interface?
Feature lldp is enable by default on Nexus 5K, if there's NO ANY IMPACT to disable it globally by no feature lldp ?
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06-14-2019 03:54 AM
You cannot disable LLDP on FEX switch it will have to disabled on the mother switch.
You only need LLDP if you are using FCoE for storage. LLDP is needed for DCBX communication.
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06-14-2019 04:52 AM
I do not quite understand you, I'm trying to disable LLDP on FEX interfaces on the parent switch, cause LLDP run on FEX interface:
___________________________________________________________
NX5548-1# sh lldp interface ethernet 101/1/1
Interface Information:
Enable (tx/rx/dcbx): Y/Y/Y Port Mac address: f0:78:16:eb:54:a2
___________________________________________________________
NX5548-1# conf sync
Enter configuration commands, one per line. End with CNTL/Z.
NX5548-1(config-sync)# switch-profile card
Switch-Profile started, Profile ID is 1
NX5548-1(config-sync-sp)# interface e101/1/1
NX5548-1(config-sync-sp-if)# no l?
lacp Configure LACP parameters
link Configure link
load-interval Specify interval for load calculation for an interface
NX5548-1(config-sync-sp-if)#
___________________________________________________________
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06-14-2019 07:08 AM
AFAIK .. you cannot disable on a single FEX port. You disable on the port of the parent switch where FEX is connected. AND that will disable for the whole FEX.
"All LLDP configuration on Fabric Extender ports occurs on the supervisor. LLDP configuration and show commands are not visible on the Fabric Extender console."
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06-14-2019 07:43 AM
"The lldp commands are not switch-profile aware and won’t be able to configure them using "config sync". So you need to do configure via "conf t."
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06-14-2019 10:21 PM
Is LLDP disabled on an individual FEX port?
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06-15-2019 06:49 AM - edited 06-15-2019 07:00 AM
Hi, logically yes, did not check on practice (I will do it Monday)...
Cause there is no lldp commands under switch-profile (conf sync) you should define port-profile with disable LLDP via "conf t" on both parent switch, then apply this port-profile to FEX interfaces via "conf sync".
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06-15-2019 07:42 AM
Hi
Thanks for the reply.
port-profile .. ah makes sense. Please do let us know how it worked.
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06-16-2019 11:34 PM
Hi, just do it, worked as expected...
NX5548-1# sh run int e101/1/1 !Command: show running-config interface Ethernet101/1/1 !Time: Mon Jun 17 09:22:15 2019 version 5.2(1)N1(3) interface Ethernet101/1/1 inherit port-profile NoLLDP description pcterm 1 no cdp enable spanning-tree bpdufilter disable NX5548-1# sh run int e101/1/1 expand-port-profile !Command: show running-config interface Ethernet101/1/1 expand-port-profile !Time: Mon Jun 17 09:22:21 2019 version 5.2(1)N1(3) interface Ethernet101/1/1 description pcterm 1 no lldp transmit no lldp receive no cdp enable spanning-tree bpdufilter disable NX5548-1# sh lldp interface e101/1/1 Interface Information: Enable (tx/rx/dcbx): N/N/N Port Mac address: f0:78:16:eb:54:a2 NX5548-1#
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06-17-2019 12:19 AM
Thanks a lot for sharing. Really appreciate it.
Learned something :)
