09-30-2012 05:39 PM - edited 03-07-2019 09:12 AM
Dears
Would like your assistance please regarding below issue
We are having 5 TE tunnels going to same destination and we are doing load-balancing between these 5 LSPs TE tunnels.
Command "mls ip cef load-sharing full simple" is configured so that CEF will use L4 ports in its algorithm
Problem that due to CEF behavior, 2 link are v.highly utilized and the other 3 utilization are below average
What I am thinking of but not sure If this will help or not is to have 2 TE tunnels instead of 5
1 TE tunnel load balancing on 3 links ( This can be done by using static route to tail loopback poiting to the 3 links) and another TE tunnel load balancing on the other 2 links
By doing this, I think CEF would be used 2 times; first to determine which TE tunnel to use then to determine which link within the tunnel
Will this help ?
For example
interface Tunnel1
ip unnumbered Loopback0
mpls ip
tunnel destination 10.0.0.1
tunnel mode mpls traffic-eng
tunnel mpls traffic-eng autoroute announce
tunnel mpls traffic-eng path-option 1 dynamic
tunnel mpls traffic-eng fast-reroute
!
ip route 10.0.0.1 255.255.255.255 link-1
ip route 10.0.0.1 255.255.255.255 link-2
ip route 10.0.0.1 255.255.255.255 link-3
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09-30-2012 06:00 PM
Hi Sherif,
i believe you should try to have a look at this link:
http://blog.ipexpert.com/2009/04/15/mpls-te-%E2%80%93-load-sharing/
to better understand why and if it is really required the command "mls ip cef load-sharing full simple" you have issued. Since you are doing trafic engineering it is possibly a godd idea to state explicit paths and to load-share in this way rather than to involve only IP CEF which will have a limited visibility over the whole picture. To state the explicit path for each tunnel (whatever number is required) could be a way to address the flows as you require.
Hope this helps
Alessio
10-01-2012 02:31 AM
Hi Alessio
Thanks for your reply
Actually in original configuration there are 5 TE tunnels configured with explicit paths to use the 5 links. Load balancing is working fine ; i.e when you do "show ip route" you will find the route known from the 5 TE tunnels
However due to CEF algorithm, most of the traffic is using only 2 links out of 5
I configured "mls ip cef load-sharing full simple" but didnt help a lot
Thats why I thought of the above solution .. but dont know If it will help or not ?
Regards
Sherif
10-02-2012 03:44 PM
Dear,
Any ideas plz
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