Chapter 5 - Adjust & Troubleshoot Single-Area OSPF Flashcards
1
Q
Single-Area OSPF - Configure
A
#router ospf 10 #router-id 1.1.1.1 #network 172.16.1.0 0.0.0.255 area 0 #network 172.16.3.0 0.0.0.3 area 0 #network 192.168.10.4 0.0.0.3 area 0 #passive-interface g0/0 (no ospf out this int)
2
Q
OSPF Troubleshooting
A
#show ip protocols #show ip ospf #show ip ospf interface #show ip ospf neighbor #show ip ospf interface brief
3
Q
Single-Area OSPFv3 - Configure
A
#ipv6 router ospf 10 (make the ospfv3 instance) #router-id 1.1.1.1
#int g0/0 #ipv6 ospf 10 area 0 (tell each interface the ospf and area it will participate in)
That’s it!
4
Q
OSPF priorities
A
1 - 255 -- The higher the value, the more likely the router becomes the DR or BDR on the interface. #int g0/0 #ip ospf priority 255 (Will be the DR) #ip ospf priority 0 (Will never be the DR)
5
Q
OSPF Hello and Dead Timers
A
Timers matter in OSPF (not in EIGRP) #int s0/0/0 #ip ospf hello-interval 10 #ip ospf dead-interval 40
6
Q
OSPF MD5 Authentication globally (1st)
A
#router ospf 10 #area 0 authentication message-digest
#int g0/0 #ip ospf message-digest-key 1 md5 CISCO-123
7
Q
OSPF MD5 Authentication on interfaces (2nd)
A
#int g0/0 #ip ospf message-digest-key 1 md5 CISCO-123 (tell the int which key to use) #ip ospf authentication message-digest (tell int to use message-digest as authentication)
