Nokia Voyager Reference Manual page 207

Note
Step 1 below must be completed first. Steps 2 through 4 below may be
completed in any order.
1. Perform the steps as presented in the Creating a GRE Tunnel and GRE
2. OSPF provides redundancy in case a tunnel goes down. OSPF detects
Voyager Reference Guide
Tunnel Example sections. Since this example shows you how to create an
HA GRE tunnel, we need to create multiple tunnels and in two directions.
This example requires repeating steps 7 through 10 of the GRE Tunnel
example four times as follows:
a. Configuring from IP Unit 1 to IP Unit 2:
in the L
Enter
10.0.0.1
Enter
10.0.0.2
Enter
170.0.0.1
Enter
171.0.0.1
b. Configuring from IP Unit 2 to IP Unit 1:
in the L
Enter
10.0.0.2
Enter
10.0.0.1
Enter
171.0.0.1
Enter
170.0.0.1
c. Configuring from IP Unit 3 to IP Unit 4:
in the L
Enter
11.0.0.1
Enter
11.0.0.2
Enter
170.0.1.1
Enter
171.0.1.1
d. Configuring from IP Unit 4 to IP Unit 3:
Enter in the L
11.0.0.2
Enter
11.0.0.1
Enter
171.0.1.1
Enter
170.0.1.1
when the firewall at the other end of an HA GRE tunnel is no longer
reachable and then obtains a new route using the backup HA GRE tunnel
OCAL ADDRESS
in the R
EMOTE ADDRESS
in the L
OCAL ENDPOINT
in the R
EMOTE ENDPOINT
OCAL ADDRESS
in the R
EMOTE ADDRESS
in the L
OCAL ENDPOINT
in the R
EMOTE ENDPOINT
OCAL ADDRESS
in the R
EMOTE ADDRESS
in the L
OCAL ENDPOINT
in the R
EMOTE ENDPOINT
OCAL ADDRESS
in the R
EMOTE ADDRESS
in the L
OCAL ENDPOINT
in the R
EMOTE ENDPOINT
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