F3215-HP Load Balancing Module Network Management Configuration Guide-6PW101
293
*> 8.1.1.0/24 0.0.0.0 0 0 i
*> 9.1.1.0/24 3.1.1.1 0 0 65009i
* 3.1.2.1 0 0 65009i
{ T h e o utput s h ow s t wo v a l id r o u te s t o d e s t i n a t i on 9.1.1.0 / 24 : t h e r o u te w i t h n ex t h o p 3 .1.1.1 i s
marked with a greater-than sign (>), indicating it is the best route; the route with next hop
3.1.2.1 is marked with only an asterisk (*), indicating it is a valid route, but not the best.
{ By using the display ip routing-table command, you can find only one route to 9.1.1.0/24 with
next hop 3.1.1.1 and output interface GigabitEthernet 0/1.
c. Configure load balancing:
Because LB has two routes to reach AS 65009, configuring load balancing over the two BGP
routes on LB can improve link utilization.
# Configure LB.
[LB] bgp 65008
[LB-bgp] balance 2
[LB-bgp] quit
d. Verify the configuration:
# Display the BGP routing table on LB.
[LB] display bgp routing-table
Total Number of Routes: 3
BGP Local router ID is 1.1.1.1
Status codes: * - valid, ^ - VPNv4 best, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 8.1.1.0/24 0.0.0.0 0 0 i
*> 9.1.1.0/24 3.1.1.1 0 0 65009i
*> 3.1.2.1 0 0 65009i
{ The output shows two valid routes to the destination 9.1.1.0/24, and both of them are marked
with a greater-than sign (>), indicating they are the best routes.
{ By using the display ip routing-table command, you can find two routes to 9.1.1.0/24: one with
next hop 3.1.1.1 and output interface GigabitEthernet 0/1, the other with next hop 3.1.2.1 and
output interface GigabitEthernet 0/2.
BGP route summarization configuration example
1. Network requirements
As shown in Figure 165, run EB
GP between LB and Router C, so the internal network and external
network can communicate with each other.
In AS 65106, configure static routing between Router A and Router B, configure OSPF between Router B
and LB, and configure OSPF to redistribute static routes, so devices in the internal network can
communicate with each other.
Configure route summarization on LB so BGP advertises a summary route instead of the specific networks
192.168.64.0/24, 192.168.74.0/24, and 192.168.99.0/24 to Router D.