Hi Andy,
Here is the result:
rtr4-c-1-bjbj#sh ip cef 202.97.9.60
202.97.9.60/30, version 35751988, per-destination sharing, 0 packets, 0 bytes
via 202.97.9.17, POS2/0, 21 dependencies
traffic share 1
next hop 202.97.9.17, POS2/0
valid adjacency
via 202.97.9.161, POS2/3, 21 dependencies
traffic share 1, current path
next hop 202.97.9.161, POS2/3
valid adjacency
via 202.97.10.173, ATM4/1.1, 22 dependencies
traffic share 1
next hop 202.97.10.173, ATM4/1.1
valid adjacency
0 packets, 0 bytes switched through the prefix
rtr4-c-1-bjbj#sh ip cef 202.97.9.60 int
202.97.9.60/30, version 35751988, per-destination sharing, 0 packets, 0 bytes
via 202.97.9.17, POS2/0, 21 dependencies
traffic share 1
next hop 202.97.9.17, POS2/0
valid adjacency
via 202.97.9.161, POS2/3, 21 dependencies
traffic share 1, current path
next hop 202.97.9.161, POS2/3
valid adjacency
via 202.97.10.173, ATM4/1.1, 22 dependencies
traffic share 1
next hop 202.97.10.173, ATM4/1.1
valid adjacency
0 packets, 0 bytes switched through the prefix
Load distribution: 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 (refcount 65)
Hash OK Interface Address Packets
1 Y POS2/0 point2point 0
2 Y POS2/3 point2point 0
3 Y ATM4/1.1 point2point 0
4 Y POS2/0 point2point 0
5 Y POS2/3 point2point 0
6 Y ATM4/1.1 point2point 0
7 Y POS2/0 point2point 0
8 Y POS2/3 point2point 0
9 Y ATM4/1.1 point2point 0
10 Y POS2/0 point2point 0
11 Y POS2/3 point2point 0
12 Y ATM4/1.1 point2point 0
13 Y POS2/0 point2point 0
14 Y POS2/3 point2point 0
15 Y ATM4/1.1 point2point 0
16 Y POS2/0 point2point 0
Just like in the "sh ip ro", all the three links have equal share of the traffic.
Because of them is ATM PVC, can I set him to share a small amount of traffic ?
Unequal share ? Note we'd not use MPLS tunnel tricks.
regards,
------------------------------------------
(Mr.) Yu(2) Ning(2)
Support Engineer, Int'l/Domestic Routing
ChinaNET (AS4134) Backbone Operation
Beijing, P.R.C. +86-10-66418105/8121/8122
------------------------------------------
----- Original Message -----
From: "Andy Li" <ali@cisco.com>
To: "Yu Ning" <yuning@ns.chinanet.cn.net>; <cisco-nsp@puck.nether.net>
Cc: "Chinanet-vt" <Chinanet-vt@cisco.com>
Sent: Monday, September 25, 2000 11:56 PM
Subject: RE: How to adjust the "traffic share count/ratio" of equal cost IGP path ?
> Please give theo utput of the following command
>
> sh ip cef 202.97.9.60
>
> Thanks
> Andy
>
> -----Original Message-----
> From: Yu Ning [mailto:yuning@ns.chinanet.cn.net]
> Sent: Monday, September 25, 2000 12:21 AM
> To: cisco-nsp@puck.nether.net
> Cc: Chinanet-vt
> Subject: How to adjust the "traffic share count/ratio" of equal cost IGP
> path ?
>
>
> Hi All,
>
> We know that if we see equal cost IGP routes, the Cisco box will load
> balance between
> the different output interfaces. For example:
>
> Routing entry for 202.97.9.60/30
> Known via "isis", distance 115, metric 5, type level-2
> Redistributing via isis
> Last update from 202.97.10.173 on ATM4/1.1, 5d04h ago
> Routing Descriptor Blocks:
> * 202.97.9.17, from 202.97.9.17, via POS2/0
> Route metric is 5, traffic share count is 1
> 202.97.9.161, from 202.97.9.161, via POS2/3
> Route metric is 5, traffic share count is 1
> 202.97.10.173, from 202.97.10.173, via ATM4/1.1
> Route metric is 5, traffic share count is 1
>
> The "*" sign indicate the current route used. But normally the traffic load
> will evenly
> shared in all the parallel paths, no matter how different BW they are. Then
> I wonder if
> there is any method to adjust the "traffic share count" of the different
> output interface,
> so that I can get an uneven load share?
>
> The possibility of this idea comes to me when I dig some document on cisco
> MPLS-TE, it says
> that if two MPLS tunnels have different BW, the "traffic share count" will
> be adjusted according
> to the bandwidth ratio automatically. Because the load share is based on the
> CEF, and is generic
> to all kinds of IGP, then I think it maybe possible in ISIS.
>
> Our environment is: GSR with dCEF enable, IOS 12.0 train. IGP=ISIS.
>
> Any input? Thanks!
>
>
> Yu Ning
> -------------------------------------------
> (Mr.) Yu(2) Ning(2)
> ChinaNet Backbone Operation
> Networking Dep.,Datacom Bureau
> China Telecom.,Beijing,P.R.C
> +86-10-66418105/66418121/66418122
> -------------------------------------------
>
>
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