Cisco NCS 5500 Series Configuration Manual page 27

Implementing BGP
SUMMARY STEPS
1. configure
2. router bgp as-number
3. address-family { ipv4 | ipv6 } unicast
4. aggregate-address address/mask-length [ as-set ] [ as-confed-set ] [ summary-only ] [ route-policy
route-policy-name ]
5. commit
DETAILED STEPS
Step 1
configure
Step 2 router bgp as-number
Example:
RP/0/RP0/CPU0:router(config)# router bgp 120
Specifies the autonomous system number and enters the BGP configuration mode, allowing you to configure the BGP
routing process.
Step 3 address-family { ipv4 | ipv6 } unicast
Example:
RP/0/RP0/CPU0:router(config-bgp)# address-family ipv4 unicast
Specifies either the IPv4 or IPv6 address family and enters address family configuration submode.
To see a list of all the possible keywords and arguments for this command, use the CLI help (?).
Step 4 aggregate-address address/mask-length [ as-set ] [ as-confed-set ] [ summary-only ] [ route-policy route-policy-name
]
Example:
RP/0/RP0/CPU0:router(config-bgp-af)# aggregate-address 10.0.0.0/8 as-set
Creates an aggregate address. The path advertised for this route is an autonomous system set consisting of all elements
contained in all paths that are being summarized.
• The as-set keyword generates autonomous system set path information and community information from
contributing paths.
• The as-confed-set keyword generates autonomous system confederation set path information from contributing
paths.
• The summary-only keyword filters all more specific routes from updates.
• The route-policy route-policy-name keyword and argument specify the route policy used to set the attributes of
the aggregate route.
Step 5 commit
BGP Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
Configure Aggregate Addresses
17