H3C Technologies H3C SR8800 - Manual (Page 263)

247
*> 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
{
From the output, you can find two valid routes to destination 9.1.1.0/24: the route with next hop
3.1.1.1 is 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 outbound interface GE4/1/2.
3. Configure load balancing:
Since Router A has two routes to reach AS 65009, configuring load balancing over the two BGP
routes on Router A can improve link utilization.
# Configure Router A.
[RouterA] bgp 65008
[RouterA-bgp] balance 2
[RouterA-bgp] quit
4. Verify the configuration:
# Display the BGP routing table on Router A.
[RouterA] 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
{
From the above output information, you can find 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 outbound interface GE4/1/2, the other with next hop 3.1.2.1 and
outbound interface GE4/1/1.
BGP community configuration example
Network requirements
As shown in Figure 93 , Router B establishes EBGP connections with Router A and Router C. Configure
No_Export community attribute on Router A to make routes from AS 10 not advertised by AS 20 to any
other AS.