221
Step Command Remarks
2. Enter BGP view or BGP-VPN
instance view.
• Enter BGP view:
bgp as-number
• Enter BGP-VPN instance
view:
a. bgp as-number
b. ip vpn-instance
vpn-instance-name
N/A
3. Enter BGP IPv4 unicast
address family view or
BGP-VPN IPv4 unicast
address family view.
address-family ipv4
[
unicast
] N/A
4. Enable MED comparison for
routes from confederation
peers.
bestroute med-confederation
By default, this feature is disabled.
To enable MED comparison for routes from confederation peers (IPv6):
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter BGP view.
bgp
as-number
N/A
3. Enter BGP IPv6 unicast
address family view.
address-family ipv6
[
unicast
] N/A
4. Enable MED comparison for
routes from confederation
peers.
bestroute med-confederation
By default, this feature is disabled.
Configuring the NEXT_HOP attribute
By default, a BGP router does not set itself as the next hop for routes advertised to an IBGP peer or
peer group. In some cases, however, you must configure the advertising router as the next hop to
make sure the BGP peer can find the correct next hop.
For example, as shown in Figure 58, Route
r A and Router B establish an EBGP neighbor
relationship, and Router B and Router C establish an IBGP neighbor relationship. If Router C has no
route destined for IP address 1.1.1.1/24, you must configure Router B to set itself 3.1.1.1/24 as the
next hop for the network 2.1.1.1/24 advertised to Router C.
Figure 58 NEXT_HOP attribute configuration
If a BGP router has two peers on a broadcast network, it does not set itself as the next hop for routes
sent to an EBGP peer by default. As shown in Figure 59, Route
r A and Router B establish an EBGP
neighbor relationship, and Router B and Router C establish an IBGP neighbor relationship. They are
on the same broadcast network 1.1.1.0/24. When Router B sends EBGP routes to Router A, it does
not set itself as the next hop by default. However, you can configure Router B to set it (1.1.1.2/24) as
the next hop for routes sent to Router A by using the peer next-hop-local command as needed.
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