R1#show run int port-channel 1interface Port-channel1switchportip address 192.168.20.3 255.255.255.248R1#show run | find routerrouter ospf 1router-id 172.15.1.1passive-interface defaultno passive-interface Port-channel1network 2.2.2.0 0.0.0.255 area 0network 3.3.3.0 0.0.0.255 area 0network 4.4.4.0 0.0.0.255 area 0(The above subnets correspond to loopback interfaces lo2, lo3 and lo4. These three loopbackinterfaces are advertised to the VLT pair, Dell#1 and Dell#2)network 172.15.1.0 0.0.0.255 area 0network 192.168.20.0 0.0.0.7 area 0CR1#show ip ospf neighbor(R1 is a DROTHER)Neighbor ID Pri State Dead Time Address Interface172.16.1.2 1 FULL/BDR 00:00:31 192.168.20.2 Port-channel1172.17.1.1 1 FULL/DR 00:00:38 192.168.20.1 Port-channel1CR1#show ip route(Output Truncated)2.0.0.0/24 is subnetted, 1 subnetsC 2.2.2.0 is directly connected, Loopback23.0.0.0/24 is subnetted, 1 subnetsC 3.3.3.0 is directly connected, Loopback3O 192.168.8.0/24 [110/2] via 192.168.20.2, 02:02:34, Port-channel1[110/2] via 192.168.20.1, 02:02:34, Port-channel1(OSPF-learned route back to client subnet – VLAN 800)4.0.0.0/24 is subnetted, 1 subnetsC 4.4.4.0 is directly connected, Loopback4O 192.168.9.0/24 [110/2] via 192.168.20.2, 02:02:34, Port-channel1[110/2] via 192.168.20.1, 02:02:34, Port-channel1(OSPF-learned route back to client subnet #2 – VLAN 900)172.17.0.0/24 is subnetted, 1 subnetsO 172.17.1.1 [110/1] via 192.168.20.1, 02:02:34, Port-channel1172.16.0.0/24 is subnetted, 1 subnetsO 172.16.1.2 [110/1] via 192.168.20.2, 02:02:34, Port-channel1192.168.20.0/29 is subnetted, 1 subnetsC 192.168.20.0 is directly connected, Port-channel1(OSPF peering VLAN)10.0.0.0/24 is subnetted, 1 subnetsC 10.10.10.0 is directly connected, FastEthernet0/2Access Switch A1 Configurations and VerificationA1 access switch is configured to not be the STP root bridgeA1#sh run | be spanningspanning-tree mode pvstspanning-tree vlan 1,800,900 priority 61440interface Port-channeL2description Port-Channel_to_Dell_VLT_Te0/4switchport trunk encapsulation dot1qswitchport mode trunkspanning-tree portfast trunkVirtual Link Trunking (VLT) 957
