Open Shortest Path First (OSPFv2 and OSPFv3) | 703Figure 32-4. Enabling RFC-2328 Compliant OSPF FloodingIn FTOS Version, 7.5.1.0 use show ip ospf to confirm that RFC-2328 compliant OSPF flooding is enabled,as shown below.Figure 32-5. Enabling RFC-2328 Compliant OSPF FloodingOSPF ACK PackingThe OSPF ACK Packing feature bundles multiple LS acknowledgements in a single packet, significantlyreducing the number of ACK packets transmitted when the number of LSAs increases. This feature alsoenhances network utilization and reduces the number of small ACK packets sent to a neighboring router.OSPF ACK packing is enabled by default, and non-configurable.OSPF Adjacency with Cisco RoutersTo establish an OSPF adjacency between Force 10 and Cisco routers, the hello interval and dead intervalmust be the same on both routers. In FTOS the OSPF dead interval value is, by default, set to 40 seconds,and is independent of the OSPF hello interval. Configuring a hello interval does not change the deadinterval in FTOS. In contrast, the OSPF dead interval on a Cisco router is, by default, four times aslong as the hello interval. Changing the hello interval on the Cisco router automatically changesthe dead interval as well.00:10:41 : OSPF(1000:00):Rcv. v:2 t:5(LSAck) l:64 Acks 2 rid:2.2.2.2aid:1500 chk:0xdbee aut:0 auk: keyid:0 from:Vl 1000LSType:Type-5 AS External id:160.1.1.0 adv:6.1.0.0 seq:0x8000000cLSType:Type-5 AS External id:160.1.2.0 adv:6.1.0.0 seq:0x8000000c00:10:41 : OSPF(1000:00):Rcv. v:2 t:5(LSAck) l:64 Acks 2 rid:2.2.2.2aid:1500 chk:0xdbee aut:0 auk: keyid:0 from:Vl 100LSType:Type-5 AS External id:160.1.1.0 adv:6.1.0.0 seq:0x8000000cLSType:Type-5 AS External id:160.1.2.0 adv:6.1.0.0 seq:0x8000000c00:10:41 : OSPF(1000:00):Rcv. v:2 t:4(LSUpd) l:100 rid:6.1.0.0aid:0 chk:0xccbd aut:0 auk: keyid:0 from:Gi 10/21Number of LSA:2LSType:Type-5 AS External(5) Age:1 Seq:0x8000000c id:170.1.1.0 Adv:6.1.0.0Netmask:255.255.255.0 fwd:0.0.0.0 E2, tos:0 metric:0LSType:Type-5 AS External(5) Age:1 Seq:0x8000000c id:170.1.2.0 Adv:6.1.0.0Netmask:255.255.255.0 fwd:0.0.0.0 E2, tos:0 metric:0Printed only for ACK packetsNo change in update packetsFTOS#show ip ospfRouting Process ospf 1 with ID 2.2.2.2Supports only single TOS (TOS0) routesIt is an Autonomous System Boundary RouterIt is Flooding according to RFC 2328SPF schedule delay 5 secs, Hold time between two SPFs 10 secsNumber of area in this router is 1, normal 0 stub 0 nssa 1--More--
