H3C Technologies H3C S5560 Series Switches - Manual (Page 317)

301
Summary Count : 1
Destination: 1.1.1.0/24
Protocol: BGP Process ID: 0
SubProtID: 0x1 Age: 00h03m08s
Cost: 100 Preference: 255
Tag: 0 State: Active Adv
OrigTblID: 0x1 OrigVrf: default-vrf
TableID: 0x2 OrigAs: 0
NBRID: 0x15000000 LastAs: 0
AttrID: 0x0 Neighbor: 2.0.1.1
Flags: 0x10060 OrigNextHop: 2.0.1.1
Label: NULL RealNextHop: 2.0.2.1
BkLabel: NULL BkNextHop: N/A
Tunnel ID: Invalid Interface: Vlan-interface201
BkTunnel ID: Invalid BkInterface: N/A
The output shows that Switch C communicates with network 1.1.1.0/24 through the path Switch
C<—>Switch D<—>Switch A.
BGP FRR configuration example
Network requirements
As shown in Figure 73 , configure BGP FRR so that when Link B fails, BGP uses Link A to forward traffic.
Figure 73 Network diagram
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown.)
2. Configure OSPF in AS 200 to ensure connectivity among Switch B, Switch C and Switch D.
(Details not shown.)
3. Configure BGP connections:
Switch B
Switch C
Switch D
AS 200
AS 100
Switch A
Loo
p0
1.1.1.1/32
Loop0
4.4.4.4/32
Vlan-int 200
30.1.1.1/24
Vlan-int 100
10.1.1.1/24
Vlan-int 100
10.1.1.2/24
Vlan-int 101
20.1.1.2/24
Vlan-int 201
40.1.1.4/24
Vlan-int 101
20.1.1.4/24
Vlan-int 200
30.1.1.3/24
Vlan-int 201
40.1.1.3/24
Link A
Link B
Loop0
2.2.2.2/32
Loop0
3.3.3.3/32