The topological diagram is as follows: The 
equipment of company A can choose to go to the 30-segment or the 40-segment
r1 routing table configuration to access the B company :
There are two routes to the 192.168.20.254 R1 router in the 20 network segment of company B. The priority is 60 by default, which can load business traffic at the same time. Theoretically, it is the load balancing
test pc route selection:
pc1 pc3 walk 40 segments pc2 walk 30 segments, no problem, then
test the broken link to see if the link is automatically switched:
After a link is disconnected, pc1 will not be affected. pc2 will automatically switch to another link, and pc2 will automatically switch back after the link is restored.
If the default routing load balancing effect is not good, how to force some users to
switch to another low-traffic link? Choose pc1 pc3 users under the 40 network segment, and use ACL policy to force pc1 pc3 users to switch to the second link 30 network Segment
ACL configuration:
match ACL:
acl number 3555
rule 5 permit ip source 192.168.10.252 0
rule 10 permit ip source 192.168.10.254 0
Configure traffic classification:
traffic classifier pjb-ceshi operator or
if-match acl 3555
Configure
traffic behavior : traffic behavior pangjunbo
redirect ip-nexthop 192.168.30.20
Configure traffic policy
traffic policy pangjunbo_ceshi
classifier pjb-ceshi behavior pangjunbo is
applied to the interface:
interface GigabitEthernet0/0/2
traffic-policy pangjunbo_ceshi inbound
As shown in the figure:
pc1 pc3 switch to 30 network segments