H3C Technologies H3C S7500E Series Switches - Manual (Page 254)

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*> 8.1.1.0/24 3.1.1.2 0 0 65008i
# Display the BGP routing table on Switch C.
[SwitchC] display bgp routing-table
Total Number of Routes: 1
BGP Local router ID is 3.3.3.3
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
i 8.1.1.0/24 3.1.1.2 0 100 0 65008i
From the above outputs, you can find Switch A has learned no route to AS65009, and Switch C has
learned network 8.1.1.0 but the next hop 3.1.1.2 is unreachable, so the route is invalid.
4) Redistribute direct routes
Configure BGP to redistribute direct routes on Switch B, so that Switch A can obtain the route to
9.1.1.0/24 and Switch C can obtain the route to 3.1.1.0/24.
# Configure Switch B.
[SwitchB] bgp 65009
[SwitchB-bgp] import-route direct
# Display the BGP routing table on Switch A.
[SwitchA] display bgp routing-table
Total Number of Routes: 4
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
*> 2.2.2.2/32 3.1.1.1 0 0 65009?
* 3.1.1.0/24 3.1.1.1 0 0 65009?
*> 8.1.1.0/24 0.0.0.0 0 0 i
*> 9.1.1.0/24 3.1.1.1 0 0 65009?
Two routes 2.2.2.2/32 and 9.1.1.0/24 have been added in Switch A’s routing table.
# Display the BGP routing table on Switch C.
[SwitchC] display bgp routing-table
Total Number of Routes: 4
BGP Local router ID is 3.3.3.3
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
i 2.2.2.2/32 2.2.2.2 0 100 0 ?
*>i 3.1.1.0/24 2.2.2.2 0 100 0 ?
*>i 8.1.1.0/24 3.1.1.2 0 100 0 65008i
* i 9.1.1.0/24 2.2.2.2 0 100 0 ?
You can find the route 8.1.1.0 becomes valid with the next hop as Switch A.