User`s guide

9-14 Preliminary November 23, 1998 MultiVoice Gateway for the MAX— User’s Guide
Configuring OSPF Routing
Administering OSPF
Administering OSPF
This section describes how to work with OSPF information in the routing table and how to
monitor OSPF activity in the terminal-server command-line interface.
To invoke the terminal-server interface, select System > Sys Diag > Term Serv and press Enter.
Working with the routing table
The OSPF routing table includes routes built from the router’s link-state database as well as
those added by external routing protocols such as RIP. You can also add routes statically (for
example, to direct traffic destined for a remote site through one of several possible border
routers.) For details about adding static routes (for example, if you want to force the use of one
route over those learned from OSPF), see Chapter 8, “Configuring IP Routing.”.
To display the IP routing table with added OSPF information, invoke the terminal-server
(System > Sys Diag > Term Serv) and use the Iproute Show command with the –l option:
ascend% iproute show -l
In addition to the standard routing-table fields, which are described in Chapter 8, “Configuring
IP Routing,” the following three columns are specific to OSPF and are displayed only when
you use the –l option. These OSPF-specific columns are displayed at the far right of the
routing table:
... Cost T Tag
... 1 0 0xc0000000
... 9 1 0xc8000000
... 10 0 0xc0000000
... 9 1 0xc8000000
... 1 1 0xc0000000
... 3 1 0xc8000000
... 9 1 0xc8000000
... 4 1 0xc8000000
... 5 1 0xc8000000
... 3 1 0xc8000000
... 3 1 0xc8000000
... 3 1 0xc8000000
Column Description
Cost The cost of an OSPF route. The interpretation of this cost depends on the type
of external metric, which is displayed in the next column. If the MultiVoice
Gateway is advertising Type-1 metrics, OSPF can use the specified number as
the cost of the route. Type-2 external metrics are an order of magnitude larger.
T The ASE-type of metric to be advertised for an external route. A 0 (zero) in
this column means that the metric is an external-Type-1 or an OSPF internal
route. A 1 means that the route is an external-Type-2 route.
Tag Specifies a 32-bit hexadecimal number attached to each external route to tag it
as external to the AS. This number may be used by border routers to filter this
record.