Cisco Router Configuration

This guide provides a standard BGP configuration template for connecting Cisco IOS/IOS-XE devices to IXPN.

Prerequisites

• Assigned ASN from AFRINIC or your RIR
• IXPN IP allocation (IPv4/IPv6)
• Physical or logical link to IXPN

Configuration Template

1. Configure Peer IP address

    interface gigabitethernet <interface-number>
    ip address <ip_address> <netmask>
    no shutdown
    commit
    exit

2. Provision a route policy to be attatched to BGP neighbor. At minimum this policy should have this pass-all action.

    route-policy <policy-name>
        pass
    end-policy
    commit

3. Start a BGP routing Instance

    router bgp <your-asn>
    commit

4. Activate global BGP address-family

    address-family ipv4 unicast
    commit
    exit

5. Disble BGP first-as enforcement to receive updates from route server. This is necessary because the route servers do not include its ASN in the AS-PATH sequence of updates.

    bgp enforce-first-as disable
    commit

6. Configure BGP neighbor

    nighbor <neighbor-ip>
    remote-as <neighbor-asn>
    commit

7. Activate address family for neighbor (IPv4/IPv6)

    neighbor <neighbor-ip>
    address-family ipv4 | ipv6 unicast
    soft-reconfiguration inbound
    commit

8. Attach route policy to neighbor

    neighbor <neighbor-ip>
    route-policy <policy-_ame> in
    route-policy <policy_nam> out

9. Verify BGP session

    show bgp ipv4 unicast summary