Routing Protocols; Cpe Connectivity Check - Alcatel-Lucent 7750 SR Manual

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Routing Protocols

The IES IP interfaces are restricted as to the routing protocols that can be defined on the interface

based on the fact that the customer has a different routing domain for this service. The IES IP

interfaces support the following routing protocols:

Note that the SAP for the IES IP interface is created at the IES service level, but the routing

protocols for the IES IP interface are configured at the routing protocol level for the main router

Static routes are used within many IES services. Unlike dynamic routing protocols, there is no way

to change the state of routes based on availability information for the associated CPE. CPE

connectivity check adds flexibility so that unavailable destinations will be removed from the

service provider's routing tables dynamically and minimize wasted bandwidth.

The availability of the far-end static route is monitored through periodic polling. The polling

period is configured. If the poll fails a specified number of sequential polls, the static route is

marked as inactive.

Either ICMP ping or unicast ARP mechanism can be used to test the connectivity. ICMP ping is

If the connectivity check fails and the static route is de-activated, the router will continue to send

polls and re-activate any routes that are restored.

7750 SR OS Services Guide