Internet Exchange Point

Configuration Hints

LONAP runs a stable Internet Exchange, because there is a set of regulations that prohibit certain types of traffic. The example configurations on this page can be used to configure your peering router interfaces, in order to prevent the prohibited traffic reaching the exchange. We recommend that you base your configurations on the example on this page. If you wish to share your configuration for a router that is not described on this page, then please send it to support-at-lonap-dot-net.

It is important to stress that these configurations are sample configurations and you should ensure that the recommendations will fit with your topology. Changes to router software and new protocols released in time may require these recommendations to alter.

Cisco Router, directly connected to the exchange

Connecting your router directly to the exchange is the recommended configuration. This configuration is for members who connect to LONAP and take a 'single VLAN' (access) port. This is the default port style, and the port you will be assigned unless you specifically ask for a multiple VLAN port.

interface GigabitEthernet x/y
        ip address 5.57.80.x 255.255.252.0
        description PEERING:: LONAP Internet Exchange
        no ip redirects
        no ip proxy-arp
        no cdp enable
        no ip directed-broadcast
        no mop enable
        no keepalive

Cisco Router, connected via intermedia Cisco Switch

This configuration effectively extends the number of ports on your router using 802.1q VLAN trunking. It is not the recommended configuration style, because this method can cause frames to leak from any intermediate switch, towards the exchange. Should this occur, the exchange will shut down your port in order to protect the health of the internet exchange.

There is a wide variety of switches that can act as intermediate switches. This configuration assumes your switch runs IOS. If a command in this sample configuration is not accepted by your switch, you can check to see whether the feature is available on your equipment - if not then there is no need to explicitly disable the configuration.

Intermediate Switch

interface GigabitEthernet x/y
        description Port facing LONAP Internet Exchange
        switchport access vlan 300
        switchport mode access
        switchport nonegotiate
        no keepalive
        no cdp enable
        no lldp receive
        no lldp transmit
        no udld enable
        spanning-tree bpdufilter enable
    end

    vlan 300
        name LONAP
    end

    interface GigabitEthernet x/z
        description Port Facing London router xxx
        switchport mode trunk
        switchport trunk allowed vlan 300

Router terminating BGP Sessions

interface GigabitEthernet x/y
        description Port facing London Switch yyy
        no ip address
    interface GigabitEthernet x/y.300
        description PEERING:: LONAP Internet Exchange
        encapsulation dot1q 300
        ip address 5.57.80.x 255.255.252.0
        no ip redirects
        no ip proxy-arp
        no cdp enable
        no ip directed-broadcast
        no mop enable
        no keepalive

Juniper Router connected to exchange

Access Interface

ge-0/0/x {
        unit 0 {
            description "PEERING:: LONAP";
            family inet {
                no-redirects
                address 5.57.80.x/22;
            }
            family inet6 {
                address 2001:7F8:17::xxxx:1/64;
            }
        }
    }

Tagged Interface

ge-0/0/x {
        vlan-tagging;
        unit 4 {
            description "PEERING:: LONAP";
            vlan-id 4;
            family inet {
                no-redirects
                address 5.57.80.x/22;
            }
            family inet6 {
                address 2001:7F8:17::xxxx:1/64;
            }
        }
    }