Huawei Quidway NetEngine80E Configuration Manual page 794

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
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Issue 02 (2014-09-30)
NOTE
If BGP load balancing is configured, the local router changes the next-hop address of a route
to it's own IP address when advertising the route to IBGP peers or peer groups, regardless of
whether the peer next-hop-local command is used.
Prevent a device from changing the next-hop address of a route imported from an IGP when
the device advertises the route to an IBGP peer.
Perform the following steps on a router that runs BGP and has imported IGP routes:
1. Run:
system-view
The system view is displayed.
2. Run:
bgp { as-number-plain | as-number-dot }
The BGP view is displayed.
3. Run:
ipv4-family unicast
The IPv4 unicast address family view is displayed.
4. Run:
peer { ipv4-address | group-name } next-hop-invariable
The device is prevented from changing the next-hop address of a route imported from
an IGP before advertising the route to an IBGP peer.
By default, a device changes the next-hop address of a route imported from an IGP to
the address of the interface connecting the device to its peer when advertising the route
to an IBGP peer.
Prevent a device from changing the next-hop address of a route when the device advertises
the route to an EBGP peer.
1. Run:
system-view
The system view is displayed.
2. Run:
bgp { as-number-plain | as-number-dot }
The BGP view is displayed.
3. Run:
ipv4-family vpnv4 [ unicast ]
The BGP-VPNv4 sub-address family view is displayed.
4. Run:
peer { group-name | ipv4-address } next-hop-invariable
The device is prevented from changing the next-hop address of a route when
advertising the route to an EBGP peer.
By default, provider edges (PEs) in different ASs set up EBGP peer relationships with
each other, and they do not change next-hop addresses of routes when advertising the
routes to their EBGP peers.
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8 BGP Configuration
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