3Com S7906E Command Reference Manual page 797

The smaller the hello interval is, the faster the network converges and the more network resources
are consumed.
A so small retransmission interval will lead to unnecessary retransmissions. A big value is
appropriate for a low speed link.
You need to specify an appropriate transmission delay with the trans-delay keyword.
The authentication mode at the non-backbone virtual link end follows the one at the backbone virtual
link end. The two authentication modes (MD5 or Simple) are independent, and you can specify neither
of them.
Related commands: authentication-mode, display ospf.
Examples
# Configure a virtual link to the neighbor with router ID 1.1.1.1.
<Sysname> system-view
[Sysname] ospf 100
[Sysname-ospf-100] area 2
[Sysname-ospf-100-area-0.0.0.2] vlink-peer 1.1.1.1
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