โ05-12-2008 07:39 AM - edited โ03-05-2019 10:54 PM
I have a 3845 router and IOS c3845-advsecurityk9-mz.124-13 and I didn't find any command to set LACP (Link Access Control Protocol).
I tried as well on 7200 and as well no command to set LACP was present.
So I'm really surprised, is really Cisco supporting only its proprietary Etherchannel with Port Aggregation Protocol and not as well the 802.3ad ?
โ05-12-2008 08:04 AM
below you can see the options to set etherchannel as either Pagp or LACP ( I used 7609).
In short:Active and passive are for LACP. desirable and auto are for Pagp.Cisco recommendation is desirable both ends, I prefer ON.
Pls rate all helpful posts
Sam
TST-POP1-NPE01(config-if)#channel-group 1 mode ?
active Enable LACP unconditionally
auto Enable PAgP only if a PAgP device is detected
desirable Enable PAgP unconditionally
on Enable Etherchannel only
passive Enable LACP only if a LACP device is detected
โ05-12-2008 11:28 PM
Thanks Sam.
I will rate your post, it could helpful for people needing 802.3ad settings.
After searching for a while on Cisco website, my understanding is that 802.3ad is supported only on some combinations of platform & IOS.
For Cisco 3845 router, no matter what IOS is used, it seems 802.3ad is NOT supported at all. So this explains why I had no command available to set LACP. Bad luck, as I tried to use it in a multi-vendor environment connecting it some other equipments, which support 802.3ad in addition their own proprietary link aggregation protocol (different from Cisco's EtherChannel of course).
For Cisco 7200, apparently for some IOS this LACP 802.3ad is available.
I'm on the process to receive one of those IOS supporting 802.3ad, then I will load it on my 7200 and try to see if these commands are available.
โ05-13-2008 12:22 AM
Petru,
Thanks for the rating and for sharing ur findings with us!
Regards
Sam
โ05-13-2008 04:00 AM
Just a guess, but what I suspect sometimes happens is Cisco is sometimes a bit late to the party when a standard method provides a solution that they already solved with a proprietary solution; another example has been VRRP.
โ05-13-2008 04:06 AM
Joseph,
I think u are right !
Sam
โ05-13-2008 08:53 AM
Some updates:
Still pending the conclusion about 7200, we're going to ask Ask Cisco if the 7200 or the 7206 is really supporting LACP (802.3ad).
In the meantime one more "surprise": 802.3ad is not supported by Cisco 7201!
We tried to configure LACP on 7201 but again the luck was not on our side.
รขCisco is indicating that LACP is supported on Cisco-7201 according to the CCO documentation, but internally a รขTMEรข indicates that this is not supported on the Cisco-7201. It is also not possible to configure this on the current Cisco-7201 routers."
โ05-13-2008 09:50 AM
And to add that configuration with LACP 802.3ad on other vendor equipment's side + EtherChannel on Cisco 3845 side didn't work, no traffic was possible.
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: