08-12-2022 05:57 AM
Hi Team,
We are finding that lldp neighbor entry is visible for the subinterface(vlan interface). how to avoid the lldp neighbor for the subinterface alone?
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.198 104
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.145 104
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.719 104
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.455 104
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.626 104
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.708 105
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.722 105
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.712 106
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.267 106
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.166 107
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.158 107
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.650 107
GE0/0/26 TN-RMD-RSM-T3-ST-SBE-... Gi0/0/0.610 107
08-12-2022 07:35 AM
Instead of config lldp in global mode config it under one subinterface,
Or
Disable the lldp on all subinterface except one.
08-16-2022 10:00 PM
is it possible to enable the lldp only for the global interface. need solution to enable the lldp only on main interface.
08-17-2022 03:36 AM
try same disble the LLDP under all sub interface and enable it under main interface
08-17-2022 05:44 AM
@MHM Cisco World Out of curiosity, since I did not get this to work: on what device and IOS is this working fro you ?
08-17-2022 05:56 AM
Hi @Georg Pauwen
I ask him try myself not try it.
is this can done in Main interface Yes it can,
the CDP and I think same is LLDP using special behave for subinterface,
the cisco Doc. mention that if the router does not have VLAN1 config and any of the subinterface is config w/wo native keyword the packet traverse over the main interface
for more detail please check this doc.
https://www.cisco.com/c/en/us/support/docs/network-management/discovery-protocol-cdp/118736-technote-cdp-00.html
08-16-2022 11:31 PM
Hello
LLDP is enable globally, so you need to turn it off at an interface level
08-17-2022 12:00 AM
Hello,
as far as I recall, you cannot disable LLDP on subinterfaces only. If you disable it on one subinterface, it will be disabled altogether, for all subinterfaces, as well as for the physical interface. I just tested this on a 16.x IOS, not sure what the behaviour is in higher versions...
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