Re: OSPF neighbour query [7:38312]
the mask is the wrong length. neighbors have to agree on mask length. -- RFC 1149 Compliant. Chhetri Naresh wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... HI Guys I have an OSPF question andmy network setup is as follows: R1--Switch--R2 R1 has an ip addres of 10.103.56.97/20 and R2 has an ip address of 10.103.56.1/21. Under OSPF the foll network command is present network 10.103.56.0 0.0.7.255 area 8. Both the routers are in the same area. The problem is that they dont form neighbours. When i ping 224.0.0.5 from both the routers both of them respond and there is no problem at layer3, ican ping each other. i did a debug on R1 and get the foll OSPF: Mismatched hello parameters from 10.103.56.1 Dead R 40 C 40, Hello R 10 C 10 Mask R 255.255.248.0 C 255.255.240.0 Its a plain config with no changes to the timer, i am assuming that since they are a broadcast ospf net work they should form neighbours. Also the foll output will be helpfull, R1#FastEthernet1/0 is up, line protocol is up Internet Address 10.103.56.97/20, Area 8 Process ID 65514, Router ID 209.25.40.16, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 209.25.40.16, Interface address 10.103.56.97 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:03 Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s) - R2#sh ip ospf in FastEthernet0/0 FastEthernet0/0 is up, line protocol is up Internet Address 10.103.56.1/21, Area 8 Process ID 65514, Router ID 10.96.255.70, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 10.96.255.70, Interface address 10.103.56.1 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:07 Index 4/4, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 0, maximum is 0 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s) Pls advise, i am going crazy over it. Thanks in advance. cheers naresh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=38313t=38312 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OSPF neighbour query [7:38312]
Reading your output further, the router told you that the masks didn't match: OSPF: Mismatched hello parameters from 10.103.56.1 Dead R 40 C 40, Hello R 10 C 10 Mask R 255.255.248.0 C 255.255.240.0 -- RFC 1149 Compliant. Steven A. Ridder wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... the mask is the wrong length. neighbors have to agree on mask length. -- RFC 1149 Compliant. Chhetri Naresh wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... HI Guys I have an OSPF question andmy network setup is as follows: R1--Switch--R2 R1 has an ip addres of 10.103.56.97/20 and R2 has an ip address of 10.103.56.1/21. Under OSPF the foll network command is present network 10.103.56.0 0.0.7.255 area 8. Both the routers are in the same area. The problem is that they dont form neighbours. When i ping 224.0.0.5 from both the routers both of them respond and there is no problem at layer3, ican ping each other. i did a debug on R1 and get the foll OSPF: Mismatched hello parameters from 10.103.56.1 Dead R 40 C 40, Hello R 10 C 10 Mask R 255.255.248.0 C 255.255.240.0 Its a plain config with no changes to the timer, i am assuming that since they are a broadcast ospf net work they should form neighbours. Also the foll output will be helpfull, R1#FastEthernet1/0 is up, line protocol is up Internet Address 10.103.56.97/20, Area 8 Process ID 65514, Router ID 209.25.40.16, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 209.25.40.16, Interface address 10.103.56.97 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:03 Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s) - R2#sh ip ospf in FastEthernet0/0 FastEthernet0/0 is up, line protocol is up Internet Address 10.103.56.1/21, Area 8 Process ID 65514, Router ID 10.96.255.70, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 10.96.255.70, Interface address 10.103.56.1 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:07 Index 4/4, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 0, maximum is 0 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s) Pls advise, i am going crazy over it. Thanks in advance. cheers naresh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=38314t=38312 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OSPF neighbour query [7:38312]
You also type it out to us: R1 has an ip address of 10.103.56.97/20 and R2 has an ip address of 10.103.56.1/21 Steven A. Ridder wrote: Reading your output further, the router told you that the masks didn't match: OSPF: Mismatched hello parameters from 10.103.56.1 Dead R 40 C 40, Hello R 10 C 10 Mask R 255.255.248.0 C 255.255.240.0 -- RFC 1149 Compliant. Steven A. Ridder wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... the mask is the wrong length. neighbors have to agree on mask length. -- RFC 1149 Compliant. Chhetri Naresh wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... HI Guys I have an OSPF question andmy network setup is as follows: R1--Switch--R2 R1 has an ip addres of 10.103.56.97/20 and R2 has an ip address of 10.103.56.1/21. Under OSPF the foll network command is present network 10.103.56.0 0.0.7.255 area 8. Both the routers are in the same area. The problem is that they dont form neighbours. When i ping 224.0.0.5 from both the routers both of them respond and there is no problem at layer3, ican ping each other. i did a debug on R1 and get the foll OSPF: Mismatched hello parameters from 10.103.56.1 Dead R 40 C 40, Hello R 10 C 10 Mask R 255.255.248.0 C 255.255.240.0 Its a plain config with no changes to the timer, i am assuming that since they are a broadcast ospf net work they should form neighbours. Also the foll output will be helpfull, R1#FastEthernet1/0 is up, line protocol is up Internet Address 10.103.56.97/20, Area 8 Process ID 65514, Router ID 209.25.40.16, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 209.25.40.16, Interface address 10.103.56.97 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:03 Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s) - R2#sh ip ospf in FastEthernet0/0 FastEthernet0/0 is up, line protocol is up Internet Address 10.103.56.1/21, Area 8 Process ID 65514, Router ID 10.96.255.70, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 10.96.255.70, Interface address 10.103.56.1 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:07 Index 4/4, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 0, maximum is 0 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s) Pls advise, i am going crazy over it. Thanks in advance. cheers naresh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=38362t=38312 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OSPF neighbour query [7:38312]
Thanks Guys For your response. The question which is not clear to me (thats a fundamental one) is even if the network statement under OSPF includes both the subnets, is it necessary to form a neighbour that the subnet mask should be the same on a broadcast medium like ethernet considering the fact that both the routers responded to 224.0.0.5 and the network command included both the subnet. For a router even if they are on diff subnets but on the same major net they can ping each other and if u do a sh ip route its says directly connected, so applying the same logic to OSPF should they form neighbours. In short , should the hello packet contain the same subnet mask to form a nighbour for broadcast OSPF network. THanks Naresh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=38363t=38312 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
