Configuring Multihop In Ebgp - Zte ZXR10 5900E Series User Manual

ZXR10 5900E Series User Manual (IPv4 Volume)
Command
ZXR10(config-router)#
ebgp-multihop [ttl <value>]
Example
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summary-only count 0
R3 learns both routes 170.20.0.0 and 170.10.0.0 but it only ad-
vertises the aggregate route 170.0.0.0/8. Pay attention to the pa-
rameter summary-only in the command. Without that parameter,
R3 will advertise both routes in addition to the aggregate route.
R4 configuration:
ZXR10_R4(config)#interface vlan1
ZXR10_R4(config-if-vlan1)#ip address 4.4.4.4 255.255.255.0
ZXR10_R4(config-if-vlan1)#exit
ZXR10_R4(config)#router bgp 400
ZXR10_R4(config-router)#neighbor 4.4.4.1 remote-as 300

Configuring Multihop in EBGP

EBGP neighbor is established on the interfaces directly connecting
two routers. If EBGP neighbor is to be established on indirectly-
connected interfaces, neighbor ebgp-multihop command is used
in order to perform EBGP multihop configuration. It is suitable for
IGP or static routing configuration to enable indirectly-connected
neighbors to communicate with each other. This section describes
the EBGP neighbor to establish on indirectly-connected interfaces.
neighbor <ip-address>
R1 needs to set up the adjacency relationship with the indirectly-
connected interface 180.225.11.1 on R2. Neighbor ebgp-multi
hop command is configured. This is shown in
F 16 CONFIGURATION OF BGP MULTIHOP
IGURE
R1 configuration:
ZXR10_R1(config)#router bgp 100
ZXR10_R1(config-router)#neighbor 180.225.11.1 remote-as 300
ZXR10_R1(config-router)#neighbor 180.225.11.1 ebgp-multihop
R2 configuration:
ZXR10_R2(config)#router bgp 300
ZXR10_R2(config-router)#neighbor 129.213.1.2 remote-as 100
Function
This configures EBGP neighbors
on indirectly-connected interface
Figure 16.