227
Step Command
Remarks
route-policy
route-policy-name
]
* ]
The
allow-direct
keyword is
available only when the specified
routing protocol is OSPF.
5.
Enable default route
redistribution into the MBGP
routing table.
default-route imported
Not enabled by default.
Configuring MBGP route summarization
To reduce the routing table size on medium and large MBGP networks, you need to configure route
summarization on peers. MBGP supports automatic and manual summarization modes.
•
Automatic
summarization
—Summarizes subnets redistributed from IGP. With the feature
configured, MBGP advertises only summary natural networks rather than subnets. The default
routes and routes injected with the
network
command are not summarized.
•
Manual
summarization
—Summarizes MBGP local routes. A manual summary route has a
higher priority than an automatic one.
To configure MBGP route summarization:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter BGP view.
bgp
as-number
N/A
3.
Enter IPv4 MBGP
address family view.
ipv4-family multicast
N/A
4.
Configure MBGP route
summarization.
•
Enable automatic route summarization:
summary automatic
•
Configure manual route summarization:
aggregate
ip-address
{
mask
|
mask-length
}
[
as-set
|
attribute-policy
route-policy-name
|
detail-suppressed
|
origin-policy
route-policy-name
|
suppress-policy
route-policy-name
] *
Use either approach.
No route
summarization is
configured by default.
If both commands are
configured, the manual
route summarization
takes effect.
Advertising a default route to an IPv4 MBGP peer or peer
group
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter BGP view.
bgp
as-number
N/A
3.
Enter IPv4 MBGP address
family view.
ipv4-family multicast
N/A
4.
Advertise a default route to
an MBGP peer or peer
group.
peer
{
group-name
|
ip-address
}
default-route-advertise
[
route-policy
route-policy-name
]
Not advertised by default.
