HP 3500YL - Manual (Page 267)

IP Routing Features
Configuring OSPF
Example. To change the hello-interval on the virtual link configured for the
network in figure 5-34 on page 5-89 to 60 seconds:
■ On routing switch “A” (IP address 10.0.0.1) you would use the following
command to reconfigure the current hello-interval to 60 seconds:
ProCurve(ospf)# area 1 virtual-link 209.157.22.1
hello-interval 60
■ On routing switch “C” (IP address 209.157.22.1) you would use the
following command to reconfigure the current hello-interval to 60
seconds
ProCurve(ospf)# area 1 virtual-link 10.0.0.1
hello-interval 60
Configuring OSPF Authentication on a Virtual Link
OSPF supports the same two methods of authentication for virtual links as it
does for VLANs and subnets in an area—password and MD5. In the default
configuration, OSPF authentication is disabled. Only one method of authen­
tication can be active on a virtual link at a time, and if one method is configured
on a virtual link, then configuring the alternative method on the same link
automatically replaces the first method with the second. Both ends of a virtual
link must use the same authentication method (none, password, or MD5 key
chain) and related credentials. (Any interfaces that share a VLAN or subnet
with the interface used on an ABR for a virtual link, including intermediate
routing switches, must be configured with the same OSPF authentication.)
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