04-14-2003 10:43 AM - edited 03-02-2019 06:39 AM
I have 2 offices connected using 1720 routers with 2 t/1's connected to each router. I would like to utilize both t/1's bandwidth. It seems as only 1 t/1 as used at a time. Config below:
Router A
e0
ip address 192.168.71.1 255.255.255.0
s0
ip address 192.168.5.2 255.255.255.252
s1
ip address 192.168.5.6 255.255.255.252
ip route 0.0.0.0 0.0.0.0 192.168.71.4
ip route 172.17.4.0 255.255.255.0 192.168.5.1
ip route 172.17.4.0 255.255.255.0 192.168.5.5
ip route 192.168.4.0 255.255.255.0 192.168.5.1
ip route 192.168.4.0 255.255.255.0 192.168.5.5
ip route 192.168.71.0 255.255.255.0 192.168.71.4
Router B
e0
ip address 192.168.4.1 255.255.255.0
s0
ip address 192.168.5.2 255.255.255.252
s1
ip address 192.168.5.6 255.255.255.252
ip route 0.0.0.0 0.0.0.0 192.168.4.2
ip route 172.17.4.0 255.255.255.0 192.168.4.2
ip route 192.168.71.0 255.255.255.0 192.168.5.2
ip route 192.168.71.0 255.255.255.0 192.168.5.6
04-14-2003 11:05 AM
on the B router you are missing the static utilizing the other T1
missing
ip route 172.17.4.0 255.255.255.0 192.168.5.1
I
04-14-2003 12:34 PM
To many typos on the cleanup config to figure out what your doing. This has the same addresses on both ends of the t1s
04-14-2003 12:41 PM
Made a mistake when I pasted the config.
Router A
e0
ip address 192.168.71.1 255.255.255.0
s0
ip address 192.168.5.2 255.255.255.252
s1
ip address 192.168.5.6 255.255.255.252
ip route 0.0.0.0 0.0.0.0 192.168.71.4
ip route 172.17.4.0 255.255.255.0 192.168.5.1
ip route 172.17.4.0 255.255.255.0 192.168.5.5
ip route 192.168.4.0 255.255.255.0 192.168.5.1
ip route 192.168.4.0 255.255.255.0 192.168.5.5
ip route 192.168.71.0 255.255.255.0 192.168.71.4
Router B
e0
ip address 192.168.4.1 255.255.255.0
s0
ip address 192.168.5.1 255.255.255.252
s1
ip address 192.168.5.5 255.255.255.252
ip route 0.0.0.0 0.0.0.0 192.168.4.2
ip route 172.17.4.0 255.255.255.0 192.168.4.2
ip route 192.168.71.0 255.255.255.0 192.168.5.2
ip route 192.168.71.0 255.255.255.0 192.168.5.6
04-14-2003 12:43 PM
Router B does not need to send 172.17.4.0 out the t/1's that destination is on the ethernet side of the router.
04-14-2003 04:44 PM
I wonder why you still have 'ip route 192.168.71.0 255.255.255.0 192.168.71.4' configured on Router A when this route is a directly connected network. The same case with Router B. Afaik, for directly connected networks, you don't need to add it in the routing table.
The serial interfaces could be using the default 'per-destination' load-balancing. Check if the serial interface is configured for fast-switching ('ip route-cache' command). To utilize both links at the same time, use per-packet load-balancing by disabling fast-switching. For more information on per-destination and per-packet load-balancing, check out the following link:
http://www.cisco.com/en/US/tech/tk826/tk365/technologies_tech_note09186a0080094820.shtml
HTH.
04-15-2003 08:39 AM
thanks I will try turning off ('ip route-cache' ).
04-16-2003 04:50 AM
Warning: Turning of fast switching (no ip route-cache) forces all packets to be process switched, which greatly increases CPU consumption and forwarding delays. Instead, you should use "Cisco Express Forwarding" and specify "per packet" load sharing. CEF consumes lots of RAM, but RAM can be added while CPU cycles are limited.
Good luck and have fun!
Vincent C Jones
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