02-14-2006 10:51 PM - edited 03-03-2019 11:45 AM
We are using ISDN BRI to backup and load balance a 128kbps leased line. However, no traffic flow on the ISDN channel.
Below are the show ip route, show ip cef and show interface:
BG1#sh ip cef 172.17.0.0 int
172.17.0.0/16, version 155, epoch 0, per-packet sharing
0 packets, 0 bytes
via 172.24.7.12, BRI0/0, 0 dependencies
traffic share 1, current path
next hop 172.24.7.12, BRI0/0
valid punt adjacency
via 10.62.1.30, Serial0/0, 0 dependencies
traffic share 1
next hop 10.62.1.30, Serial0/0
valid adjacency
0 packets, 0 bytes switched through the prefix
tmstats: external 0 packets, 0 bytes
internal 0 packets, 0 bytes
Load distribution: 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 (refcount 1)
Hash OK Interface Address Packets
1 Y special UNKNOWN 0
2 Y Serial0/0 point2point 0
3 Y special UNKNOWN 0
4 Y Serial0/0 point2point 0
5 Y special UNKNOWN 0
6 Y Serial0/0 point2point 0
7 Y special UNKNOWN 0
8 Y Serial0/0 point2point 0
9 Y special UNKNOWN 0
10 Y Serial0/0 point2point 0
11 Y special UNKNOWN 0
12 Y Serial0/0 point2point 0
13 Y special UNKNOWN 0
14 Y Serial0/0 point2point 0
15 Y special UNKNOWN 0
16 Y Serial0/0 point2point 0
refcount 6
BG1#sh ip ro 172.17.0.0
Routing entry for 172.17.0.0/16
Known via "eigrp 1", distance 90, metric 20537600, type internal
Redistributing via eigrp 1
Last update from 172.24.7.12 on BRI0/0, 00:02:20 ago
Routing Descriptor Blocks:
172.24.7.12, from 172.24.7.12, 00:02:20 ago, via BRI0/0
Route metric is 20537600, traffic share count is 1
Total delay is 21000 microseconds, minimum bandwidth is 128 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 3/255, Hops 1
* 10.62.1.30, from 10.62.1.30, 00:02:20 ago, via Serial0/0
Route metric is 20537600, traffic share count is 1
Total delay is 21000 microseconds, minimum bandwidth is 128 Kbit
Reliability 243/255, minimum MTU 1500 bytes
Loading 5/255, Hops 1
02-14-2006 11:56 PM
HI
I cannot see any backup n load commands under u r serial interface
If u want to have backup n load balance u need to configure it by using backup n load commonads in u r serial interface.
The config should be
config#int s0
config-if#backup int bri0
config-if#backup delay
config-if#backup load
might be wrong but just got an idea.
Hope this helps
02-15-2006 12:28 AM
hi,
The backup commands have been configured, and the ISDN channels are up. The problem is no traffic flow on the ISDN channels even i can see the route is correctly point to the serial and ISDN interfaces. If i disable cef and fast switching on both the interfaces, and then disable fast switching on the f0/0, then there will be some traffic flow via the ISDN channels (about 25% of the total load). Can someone explain this behavior?
02-15-2006 12:50 AM
Hello,
can you post the full configuration of your router ? Usually when you configure the backup interface command, the interface will be up but spoofing, and traffic will onll flow over that interface when the main interface goes down...
Regards,
Nethelper
02-15-2006 02:24 AM
interface Serial0/0
description 2Mbps Leased Line to Bangi (TMB)
bandwidth 128
ip address 10.62.1.30 255.255.255.252
no ip proxy-arp
ip load-sharing per-packet
backup delay 5 30
backup interface BRI0/0
backup load 30 10
load-interval 30
clockrate 128000
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide