LACP or LinK oam

[okay okay]

Hi ,

LACP is enough alone to handle unidirectional fault situation or i have to use Link OAM with ? .in situation where i have a manual LAG and i have to handle unidirectional fault which one is good  (LACP or LINK OAM 802.3ah) .If i use both is there any benefit of it.

Regards,

Meer

[Julio E. Moisa]

Hi

You could use UDLD aggresive mode. 

http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/10591-77.html

[okay okay]

if we don't become vendor specific and just have options as above LACp and link oam so what will be the best in that scenario .if LACP can negotiate status of ports and  detect unidirectional fault  than why useUDLD .

[Julio E. Moisa]

Hi

LaCP is an open standard version of Etherchannel, in few words the most of the manufacturers use LaCP on their devices.  UDLD can be seen as a complement for a link, it will useful to detect unidirectional communication failure and take actions to avoid inconveniences on the link. 

Link OAM allows network operators to monitor and troubleshoot a single Ethernet link. It is an optional sublayer implemented in the Data Link Layer between the Logical Link Control (LLC) and MAC sublayers of the Open Systems Interconnect (OSI) model. You can monitor a link for critical events and, if needed, put a remote device into loopback mode for link testing. Link OAM also discovers unidirectional links, which are created when one transmission direction fails.

[okay okay]

thanks ,LACP can detect unidirectional fault  (as my understanding it can )? if we don't want any monitoring  or dynamic lag configuration and our concern is only unidirectional fault  so LACP only can help us,if i am using a manufacturer product which have link oam feture but not UDLD so what should i enable LACP or LINK oam for unidirectional faults.