Figure 67: Directly Connected Ip Target; Figure 68: Multiple Hops To Ip Target - Alcatel-Lucent 7210 SAS M Service Manual

CPE Connectivity Check
Static routes are used within many IES and VPRN 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 VPRN routing tables dynamically and minimize wasted bandwidth.
Server B.1
11.1.B.0
11.1.A.0
Server A.1
Server B.1
11.1.B.0
11.1.A.0
Server A.1
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.
7210-SAS M Services Guide
Static-route 11.11.A.0/24 nexthop 10.1.1.2 cpe-check 10.1.1.2 interval 1 drop-count 2
Static-route 11.11.B.0/24 nexthop 10.1.1.2 cpe-check 10.1.1.2 interval 1 drop-count 2
10.1.1.0/31
VPRN A
.2 .1
CPE
7210 SAS-1
Node A

Figure 67: Directly Connected IP Target

IC-route 11.11.A.0/24 nexthop 10.1.1.2 cpe-check 10.2.2.254 interval 1 drop-count 2
IC-route 11.11.B.0/24 nexthop 10.1.1.2 cpe-check 10.2.2.254 interval 1 drop-count 2
10.2.2.0/24
254 .1
Management
CPE

Figure 68: Multiple Hops to IP Target

Virtual Private Routed Network Services
Backbone
10.1.1.0/31
VPRN A
.2 .1
7210 SAS-1
Node A
Fig_18
Backbone
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