HP HPE FlexNetwork 7500 series, Configuration Manual

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You can configure GTSM in OSPF area view or interface view.
•
The configuration in OSPF area view applies to all OSPF interfaces in the area.
•
The configuration in interface view takes precedence over OSPF area view.
IMPORTANT:
To use GTSM, you must configure GTSM on both the local and peer devices. You can specify
different
hop-count values for them.
To configure GTSM in OSPF area view:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter OSPF view.
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
N/A
3. Enter OSPF area view.
area
area-id N/A
4. Enable GTSM for the OSPF
area.
ttl-security [ hops hop-count ]
By default, GTSM is disabled for
the OSPF area.
To configure GTSM in interface view:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable GTSM for the
interface.
ospf ttl-security [ hops hop-count
|
disable
]
By default, GTSM is disabled for
the interface.
Configuring OSPF GR
GR ensures forwarding continuity when a routing protocol restarts or an active/standby switchover
occurs.
Two routers are required to complete a GR process. The following are router roles in a GR process:
•
GR restarter —Graceful restarting router. It must have GR capability.
•
GR helper —A neighbor of the GR restarter. It helps the GR restarter to complete the GR
process.
OSPF GR has the following types:
•
IETF GR —Uses Opaque LSAs to implement GR.
•
Non-IETF GR —Uses link local signaling (LLS) to advertise GR capability and uses out of band
synchronization to synchronize the LSDB.
A device can act as a GR restarter and GR helper at the same time.
Configuring OSPF GR restarter
You can configure the IETF or non-IETF OSPF GR restarter.