Exchange state, the routers exchange DBD packets, that is the complete link−state database. Though OSPF peers transition through the exstart states during the normal OSPF adjacency−building process, stuck for long time in this state is abnormal...
向其他所有邻居路由发送除successor外的路由,若没有回复则一直发送到边界 SIA(Stuck In Active) 发生SIA的情况:3分钟内未收到所有路由的REPLY包,则路由处于SIA状态,并且路由之间重新建立邻居关系 避免SIA的方法 设立STUB路由器:末节路由器 增大激活时间 细分AS,查询AS直到AS边界结束 查询到边界汇总 OSPF(open shortes...
尤其值得注意的是,虽然 MTU 不匹配是最常见的原因,但它并不是 OSPF 邻居停滞在 exstart/exchange 状态的唯一原因。 此问题通常是由于无法成功交换 DBD 数据包而导致的。 但是,根源可能在于以下原因之一: MTU 不匹配 单播中断。 在 exstart 状态下,路由器将会向邻居发送单播数据包,以选择主从设备。 这是正常的,...
This document describes how to troubleshoot situations in which Open Shortest Path First (OSPF) neighbors are stuck in Exstart and Exchange states.
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Why are OSPF Neighbors Stuck in Exstart/Exchange State? Document ID: 13684 Introduction Prerequisites Requirements Components Used Conventions Exstart State Exchange State Neighbors Stuck in Exstart/Exchange State The Solution Related Information Introduction OSPF states for adjacency formation are Down, Init...
OSPF has been configured between two NE40E. After check it has been observed that ospf state on 1st NE40E is in Exchange state and on 2nd NE40E is in Exstart state.i.e it has stuck in to Exchange/Exstart state.Device version on NE40E is as follows.display versionHuawei Versatile ...
Therefore, while the ASR and the Cat6K are stuck in the ExStart/Exchange state, would it be possible to temporarily remove the ip nat outside command from the ASR Gi0/0/2 interface to see if that resolves the issue? If so, we'd know that the problem is likely NAT-related, and we...
(my media is mpls). i am migrating my network to dmvpn with ospf, before this i was using gre tunnel with static routes. i have migrated 60 routers on it. all of the are in area 1 when i see show ip ospf nei i see 7-8 neighbour routers are stuck in exstart state. i couldn'...
The adjacency must continue past this state. If it does not, there is a problem with the DBD exchange, such as a maximum transmission unit (MTU) mismatch or the receipt of an unexpected DBD sequence number. For more information, refer toWhy Are OSPF Neighbors Stuck in Exstart/Exchange ...