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FTOS Configuration Guide for the C-Series - Force10 Networks

FTOS Configuration Guide for the C-Series - Force10 Networks

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Command Syntax Command Mode Usage<br />

graceful-restart role<br />

[helper-only |<br />

restart-only]<br />

When you configure a graceful restart, <strong>the</strong> show run ospf command (Figure 389) displays in<strong>for</strong>mation<br />

such as <strong>the</strong> following example <strong>for</strong> router OSPF 1.<br />

Figure 389 Command Example: show run ospf<br />

Use <strong>the</strong> following command to disable OSPF graceful-restart after you have enabled it.<br />

For more in<strong>for</strong>mation on OSPF graceful restart, refer to <strong>the</strong> <strong>FTOS</strong> Command Line Interface Reference.<br />

Configure virtual links<br />

Areas within OSPF must be connected to <strong>the</strong> backbone area (Area ID 0.0.0.0). If an OSPF area does not<br />

have a direct connection to <strong>the</strong> backbone, at least one virtual link is required. Virtual links must be<br />

configured on an ABR connected to <strong>the</strong> backbone.<br />

• hello-interval: help packet<br />

By default, OSPF supports both planned and unplanned restarts. Selecting one or<br />

<strong>the</strong> o<strong>the</strong>r mode restricts OSPF to <strong>the</strong> single selected mode.<br />

CONFIG-ROUTER-<br />

OSPF<br />

• retransmit-interval: LSA retransmit interval<br />

• transmit-delay: LSA transmission delay<br />

• dead-interval: dead router detection time<br />

Configure <strong>the</strong> graceful restart role or roles that this OSPF<br />

router per<strong>for</strong>ms. <strong>FTOS</strong> supports <strong>the</strong> following options:<br />

• Helper-only. The OSPF router supports graceful-restart<br />

only as a helper router.<br />

• Restart-only. The OSPF router supports graceful-restart<br />

only during unplanned restarts.<br />

By default, OSPF supports both restarting and helper roles. Selecting one or <strong>the</strong><br />

o<strong>the</strong>r role restricts OSPF to <strong>the</strong> single selected role.<br />

<strong>Force10</strong>#show run ospf<br />

!<br />

router ospf 1<br />

graceful-restart grace-period 300<br />

graceful-restart role helper-only<br />

graceful-restart mode unplanned-only<br />

graceful-restart helper-reject 10.1.1.1<br />

graceful-restart helper-reject 20.1.1.1<br />

network 10.0.2.0/24 area 0<br />

<strong>Force10</strong>#<br />

Command Syntax Command Mode Usage<br />

no graceful-restart grace-period CONFIG-ROUTER-<br />

OSPF<br />

Disable OSPF graceful-restart. Returns OSPF<br />

graceful-restart to its default state.<br />

550 Open Shortest Path First

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