09-30-2012 07:28 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-2
ip route 10.0.0.1 255.255.255.255 link-3
10-04-2012 06:29 AM
Hello Sherif,
traffic of a single TE tunnel will not be load balanced over multiple physical links as the TE tunnel is setup using a reservation and the path will use only one link for each router hop.
So moving to two TE tunnels is not an option for you.
Hope to help
Giuseppe
10-04-2012 08:09 AM
Hi Giuseppe
Yes you are totally correct ... I forgot about this issue
Many Thanks for your assistance
10-21-2013 12:57 AM
Do you have the option of using LAGs (Portchannels)
- if so then your tunnel will select one link-group instead of another but you will have loadbalancing within you LAG group.
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