Hi, I have the following comments. Scenario 1
interface fa0/1 will not send and receive ospf and 10.10.20.0 network will not be advertised by ospf. Scenario 2 nterface fa0/1 will not send ospf and adjacency can not be formed with this interface. But note that 10.10.20.0 will be advertised. Scenario 3 two points here - in standard access list protocol can not be specified - access list can not filter traffic originating from the router Rs Solomon ________________________________ From: Nhan Duong <[email protected]> To: [email protected] Sent: Tuesday, August 18, 2009 4:06:25 PM Subject: [OSL | CCIE_RS] Help with OSPF Please help to verify these scenarios =======Scenario 1============== -----------R1--------------------- int f0/0 ip address 10.10.10.1 255.255.255.0 int f0/1 ip address 10.10.20.1 255.255.255.0 router ospf 1 no auto network 10.10.10.0 0.0.0.255 ----------------------------------- "network" is controlling which interface to join ospf. Which mean int f0/1 wills not send or receive any ospf? =======Scenario 2 =============== -----------R1--------------------- int f0/0 ip address 10.10.10.1 255.255.255.0 int f0/1 ip address 10.10.20.1 255.255.255.0 router ospf 1 no auto network 10.10.0.0 0.0.255.255 passive int f0/1 ----------------------------------- "network" will allow 10.10/16 to join ospf, however "passive int f0/1" wills stop the int f0/1 to send ospf. ======== Scenario 3 ============ -----------R1--------------------- int f0/0 ip address 10.10.10.1 255.255.255.0 int f0/1 ip address 10.10.20..1 255.255.255.0 access-group 1 out access-list 1 deny ip 224.0.0.5 any access-list 1 deny ip 224.0.0.6 any access-list 1 deny ip any 224..0.0.5 access-list 1 deny ip any 224.0.0.6 access-list 1 permit ip any router ospf 1 no auto network 10.10.0.0 0.0.255.255 ----------------------------------- "network" will allow 10.10/16 to join ospf, however "access-list 1" wills stop the int f0/1 to send or receive ospf. ======== Scenario 4 ============= -----------R1--------------------- int f0/0 ip address 10.10.10.1 255.255.255.0 int f0/1 ip address 10.10.20.1 255.255.255.0 access-group 1 out access-list 1 deny ospf any any access-list 1 permit ip any router ospf 1 no auto network 10.10.10.0 0.0..255.255 ----------------------------------- "network" will allow 10.10/16 to join ospf, however "access-list 1" deny ospf protocol. ________________________________ Hotmail® is up to 70% faster. Now good news travels really fast. Try it now.
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