3Com 7700 Configuration Manual page 97

type-3 LSAs generated by the ABRs, for which the synchronization mode of the
routers in the area is not changed.
Perform the following configuration in OSPF area view.
Table 38 Configure OSPF Virtual Link
Operation
Create and configure a virtual
link
Remove the created virtual link undo vlink-peer router-id
The area-id and router-id variables have no default value. By default, the hello
timer is 10 seconds, retransmit is 5 seconds, trans-delay is 1 second, and the dead
timer is 40 seconds.
Configure Route Summarization Imported into OSPF
The OSPF implementation in the Switch 7700 supports route summarization of
imported routes.
Perform the following configurations in OSPF view.
Table 39 Configure Route Summarization when Importing Routes into OSPF
Operation
Configure summarization of
routes imported into OSPF
Remove summarization of
routes imported into OSPF
By default, summarization of imported routes is disabled.
After the summarization of imported routes is configured, if the local router is an
autonomous system border router (ASBR), this command summarizes the
imported Type-5 LSAs in the summary address range. When NSSA is configured,
this command also summarizes the imported Type-7 LSA in the summary address
range.
If the local router works as an ABR and a router in the NSSA, this command
summarizes Type-5 LSAs transformed from Type-7 LSAs. If the router is not the
router in the NSSA, the summarization is disabled.
Configure the OSPF Area to Support Packet Authentication
All the routers in an area should use the same authentication type (not supporting
authentication, supporting simple authentication or MD5 authentication). All the
routers on the same segment should use the same authentication-key password.
Use the authentication-mode simple command to configure the simple
authentication password for the area and the authentication-mode md5
command to configure the MD5 authentication-key password.
Command
vlink-peer router-id [ hello seconds] [ retransmit seconds ] [
trans-delay seconds ] [ dead seconds] [ simple password |
md5 keyid key ]
Command
asbr-summary ip-address mask [ not-advertise [ tag value ]
| tag value ]
undo asbr-summary ip-address mask [ not-advertise [ tag
value ] | tag value ]
OSPF 89