User Manual
UMN:CLI
V8102
667
12.2.7
Default Metric
OSPF finds metric based on interface bandwidth. For example, default metric of T1 link is
64, but default metric of 64K line is 1562. If there are plural lines in the bandwidth, you
can view costs to use line by assigning metric to each line.
To classify costs to use line, use the following command.
Command
Mode
Description
auto-cost
reference-bandwidth
<1-4294967>
Router
Configures default metric in the unit of Mbps.
(default: 100)
To delete the configuration, use the following command.
Command
Mode
Description
no
auto-cost
reference-
bandwidth
Router
Deletes the configuration.
12.2.8
Graceful Restart Support
You need to restart OSPF protocol processor when there is network problem. In this case,
it takes long time to restarts OSPF and there is no packet transmission. Other routers are
also need to delete routing information and register it again. Graceful Restart improves
those inconveniences. Although OSPF is restarting, Graceful Restart makes the trans-
mission of a packet with routing information.
To configure the Graceful Restart, use the following command.
Command
Mode
Description
capability restart
{
graceful
|
sig-
naling | reliable-graceful
}
Router
Configures the Graceful Restart.
no capability restart
Releases the configuration.
The following items are additional options for the Graceful Restart:
•
grace-period
When OSPF restarts, process is keeping status in graceful for the time configured as
grace-period
. After the configured time, OSPF operates in normal.
•
helper
This is functions that helps other routers around the restarting router. It makes re
starting router as a working and transmitting to other routers.
only-reload
is for the
case of OSPF router is restarting,
only-upgrade
is for the OSPF router which is up-
grading software, and
max-grace-period
works when
grace-period
from other
routers has less value than it. Configuration for Helper can be selected more than 2
options without order.
