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Author
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Topic: OSPF "Too Many Retransmission"
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WolfieRoc
Specialist
Member # 7448
Member Rated:
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posted August 02, 2007 04:05 AM
Here is the situation. On a ethernet segment, 2 routers and a switch all running OSPF. 1 router is DR and was statically chosen(ip ospf priority command) and even with the using the ip ospf mtu-ignore under all 3 interfaces I cannot get a full adjacency on the switch. I get a message of "..EXSTART to DOWN, Neighbor Down: Too many retransmissions". Any ideas?
Posts: 52 | From: Salem NH | Registered: Mar 2003
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Darrell A Escola
Guru
Member # 19526
Rate Member
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posted August 02, 2007 05:58 PM
WolfieRoc,
It sounds to me like there is a connectivity problem that is dropping packets, making it necessary to re-transmit. Check layer 2 for possible duplex mismatch and check interfaces for error statistics.
Darrell
Posts: 115 | From: Clovis, California | Registered: Jul 2006
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Hasan
Member
Member # 27229
Member Rated:
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posted November 09, 2008 10:22 PM
Hi You should Check your MTU. It is defiantly one o the labs where you created a tunnel and changed the system mtu to 1500. in ospf you will have to give the command ip ospf mtu-ignore. please try this and let me know
Posts: 17 | From: Mumbai, India | Registered: Oct 2008
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sau
Jr Member
Member # 27424
Rate Member
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posted November 30, 2008 11:11 AM
ya Hasan is right about that ip ospf mtu-ignore will definitely solve your issue !
Posts: 9 | From: Bangalore,india | Registered: Nov 2008
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