Configuration Guide User guide

xxx FastIron Configuration Guide
53-1002494-02
Chapter 31 OSPF version 2 (IPv4)
OSPF overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1226
OSPF point-to-point links . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1228
Designated routers in multi-access networks . . . . . . . . . . . 1228
Designated router election in multi-access networks . . . . . 1228
OSPF RFC 1583 and 2178 compliance . . . . . . . . . . . . . . . . 1230
Reduction of equivalent AS External LSAs . . . . . . . . . . . . . . 1230
Support for OSPF RFC 2328 Appendix E . . . . . . . . . . . . . . . 1232
Dynamic OSPF activation and configuration . . . . . . . . . . . . 1233
Dynamic OSPF memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1234
OSPF graceful restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1234
Configuring OSPF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1235
OSPF configuration rules. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1235
OSPF parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1235
Enabling OSPF on the router. . . . . . . . . . . . . . . . . . . . . . . . . 1236
Assigning OSPF areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1237
Assigning an area range (optional). . . . . . . . . . . . . . . . . . . . .1241
Assigning interfaces to an area . . . . . . . . . . . . . . . . . . . . . . 1242
Modifying interface defaults . . . . . . . . . . . . . . . . . . . . . . . . . 1242
Changing the timer for OSPF authentication changes . . . . 1245
Block flooding of outbound LSAs on specific
OSPF interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1245
Configuring an OSPF non-broadcast interface. . . . . . . . . . . 1246
Assigning virtual links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1247
Modifying virtual link parameters . . . . . . . . . . . . . . . . . . . . . 1249
Changing the reference bandwidth for the cost
on OSPF interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1251
Defining redistribution filters . . . . . . . . . . . . . . . . . . . . . . . . 1252
Preventing specific OSPF routes from being installed
in the IP route table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1255
Modifying the default metric for redistribution . . . . . . . . . . 1258
Enabling route redistribution. . . . . . . . . . . . . . . . . . . . . . . . . 1258
Disabling or re-enabling load sharing. . . . . . . . . . . . . . . . . . 1260
Configuring external route summarization. . . . . . . . . . . . . . 1262
Configuring default route origination . . . . . . . . . . . . . . . . . . 1263
Modifying SPF timers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1264
Modifying the redistribution metric type . . . . . . . . . . . . . . . 1265
Administrative distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1265
Configuring OSPF group Link State Advertisement
(LSA) pacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1266
Modifying OSPF traps generated . . . . . . . . . . . . . . . . . . . . . 1266
Specifying the types of OSPF Syslog messages to log . . . . 1267
Modifying the OSPF standard compliance setting. . . . . . . . 1268
Modifying the exit overflow interval . . . . . . . . . . . . . . . . . . . 1268
Configuring an OSPF point-to-point link . . . . . . . . . . . . . . . . 1269
Configuring OSPF graceful restart . . . . . . . . . . . . . . . . . . . . 1269