Extreme Networks ExtremeWare 7.3.0, Command Reference Manual

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configure ospf add vlan area
ExtremeWare Software 7.3.0 Command Reference Guide 1289
configure ospf add vlan area
configure ospf add vlan [<vlan name> | all] area <area identifier>
{passive}
Description
Enables OSPF on one or all VLANs (router interfaces).
Syntax Description
Default
Disabled.
Usage Guidelines
None.
Using OSPF and MPLS.
The following detailed information pertains to using OSPF in conjunction
with MPLS. When the peer LSR is also an Extreme switch, the following options are available for
ensuring that an OSPF route is advertised for the tunnel endpoint IP address:
• A route is advertised when OSPF is enabled on the VLAN to which the IP address is assigned (using
the
configure ospf add vlan
command on the peer switch).
• A route is advertised when the peer switch is configured to distribute direct routes into the OSPF
domain (via the
enable ospf export direct
command). The export option should be used when
the tunnel LSP needs to cross OSPF area boundaries or when the Extreme Standby Routing Protocol
(ESRP) is enabled on the VLAN to which the IP address is assigned.
In either case, LDP must be configured to advertise label mappings for direct routing interfaces.
In some configurations, you may want to enable loopback mode on the VLAN to which the tunnel
endpoint IP address is assigned. One situation where loopback mode may be useful is when multiple
physical interfaces, associated with different VLANs, are connected to the MPLS backbone. In this case,
use of loopback-mode can provide redundancy by enabling TLS traffic to continue even when the
physical interfaces associated with the tunnel endpoint IP address VLAN fail.
Example
The following command enables OSPF on a VLAN named accounting :
configure ospf add vlan accounting area 0.0.0.1
vlan name Specifies a VLAN name.
all Specifies all VLANs.
area identifier Specifies the area to which the VLAN is assigned.
passive Specifies to stop sending and receiving hello packets on this interface.