11-10-2008 09:00 PM - edited 03-06-2019 02:24 AM
We have etherchannel between cat6000 and cat2970. 2970 connected to many users using modems through ubr router. Etherchannel circuit is not load balancing the sent traffic towards 2970. I tried srce-dst-mac,src-dst-ip dst-ip. circuit utilization is high on single port.
I believe etherchannel load balancing is independent for each device.
i thought destination based forwarding would work but it is not.
There is no errors what so ever on interfaces
Can some one help me out.
Thnx
11-11-2008 12:25 AM
Hello Chandu,
if I understand correctly your scenario is:
c6000 --- channel --- c2970 -- UBR NAS router --- users via modems
if at the other end there is only one user that is the UBR router load-balancing on MAC addresses provides no results.
Unfortunately the ubr router could be using L2TPv2 to concentrate user PPP sessions or other form of tunneling: if so even trying to load balance using IP addresses can be useless.
If you can access the UBR router is important to understand what type of traffic is sending out /receiving because it is possible that is all inside L2TP packets.
Hope to help
Giuseppe
11-11-2008 07:52 AM
Thnk you so much for your reply.
We have 802.1q tunnelin on c6000 and no type of tunnelin on cmts(ubr). I do not know how to get to know what type of traffic is passing through,..... can u kindly help me out with a suggestion.
Thnx a ton
11-11-2008 11:19 AM
Hello Chandu,
I was thinking of possible reasons for a single IP flow.
The remote users accessing via modems are terminated on the UBR router ?
on the link of the UBR use
int fa0/0
ip accounting output-packets
these tell you the IP flows outgoing : inverting IP source and IP destination you should have an idea of the variety of traffic.
Use
sh ip accounting
after some minutes
Another thought :
is the etherchannel a dot1q tunnel on the c6000 side ?
this could have an impact on what you see
Hope to help
Giuseppe
11-11-2008 11:27 AM
Thnx yup,, etherchannel is dot1q trunk and 8021q tunnel. what impacts do we have
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