Multicast and Routing Guide K/KA/KB.15.15

Assigning VLANs and/or subnets to each area....................................................................145
Assigning loopback addresses to an area...........................................................................146
OSPF redistribution of loopback addresses.....................................................................147
Configuring external route redistribution in an OSPF domain (optional)........................................148
Configuring redistribution filters..........................................................................................148
Enabling route redistribution..............................................................................................149
Modifying the default metric for redistribution......................................................................149
Modifying the redistribution metric type..............................................................................150
Configuring ranges on an ABR to reduce advertising to the backbone.........................................150
Assigning a cost..............................................................................................................152
Allowing or blocking advertisement of a range of internal routes available in an area by an
ABR...............................................................................................................................153
Allowing or blocking a range of external routes available through an ASBR in an NSSA...........154
Influencing route choices by changing the administrative distance default.....................................154
Changing OSPF trap generation choices.................................................................................154
Adjusting performance by changing the VLAN or subnet interface settings...................................155
Indicating the cost per-interface.........................................................................................155
Indicating the per-interface dead interval............................................................................156
Indicating the per-interface hello interval.............................................................................156
Changing priority per-interface..........................................................................................156
Changing retransmit interval per-interface...........................................................................157
Changing transit-delay per-interface...................................................................................157
Examples of changing per-interface settings.........................................................................158
Configuring OSPF interface authentication...............................................................................158
Configuring OSPF password authentication.........................................................................158
Configuring OSPF MD5 authentication...............................................................................159
Configuring a virtual link.......................................................................................................159
Changing the dead interval on a virtual link........................................................................161
Indicating the hello interval on a virtual link.........................................................................161
Changing the retransmitting interval on a virtual link............................................................162
Changing the transit-delay on a virtual link..........................................................................162
Configuring OSPF authentication on a virtual link......................................................................163
Authenticating the OSPF password on a virtual link..............................................................163
Authenticating OSPF MD5 on a virtual link..........................................................................163
Configuring a passive OSPF interface......................................................................................164
Configuring the calculation interval.........................................................................................165
Viewing OSPF information.....................................................................................................166
Viewing general OSPF configuration information..................................................................166
Viewing OSPF area information.........................................................................................168
Viewing OSPF external link-state information........................................................................169
Viewing OSPF interface information...................................................................................170
Viewing OSPF interface information for a specific VLAN or IP address....................................172
Viewing OSPF packet statistics for a subnet or VLAN............................................................174
Clearing OSPF statistics for all VLAN interfaces on the switch................................................176
Viewing OSPF link-state information....................................................................................176
Viewing OSPF neighbor information...................................................................................181
Viewing OSPF redistribution information..............................................................................182
Viewing OSPF redistribution filter (restrict) information...........................................................183
Viewing OSPF virtual neighbor information.........................................................................183
Viewing OSPF virtual link information.................................................................................184
Viewing OSPF SPF statistics...............................................................................................185
Displaying OSPF route information.....................................................................................186
Viewing OSPF traps enabled.............................................................................................188
Debugging OSFP routing messages....................................................................................188
Enabling load sharing among next-hop routes..........................................................................188
8 Contents