Configuring Next_Hop Attributes For Routes - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
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8.4.6 Configuring Next_Hop Attributes for Routes

Setting Next_Hop attributes for routes flexibly controls BGP route selection.
Procedure
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Issue 02 (2014-09-30)
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:
bestroute med-confederation
The MED values of routes in a confederation are compared.
Configure a device to change the next-hop address of a route when the device advertises
the route to an IBGP peer.
By default, a device does not change the next-hop address of a route learned from an EBGP
peer before forwarding the route to IBGP peers. The next-hop address of a route advertised
by an EBGP peer to this device is the address of the EBGP peer. After being forwarded to
IBGP peers, this route cannot become an active route because the next hop is unreachable.
The relevant ASBR must be configured to change the next-hop address of the route to the
ASBR's own IP address before the ASBR advertises the route to an IBGP peer. The route
is active on the IBGP peer if the next hop is reachable.
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-local
The device is configured to change the next-hop address of a route to the device's own
IP address before the device advertises the route to an IBGP peer.
By default, a device does not change the next-hop address of a route when advertising
the route to an IBGP peer.
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8 BGP Configuration
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