Two NE40E connected using Transmission media through MUX as shown in network diagram.
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.
Huawei Versatile Routing Platform Software
VRP (R) software, Version 5.50 (V300R003C02B608)
Copyright (C) 2000-2008 Huawei Technologies Co., Ltd.
Quidway NetEngine 40E uptime is 6 days, 15 hours, 42 minutes
Service pack Version:V300R003SPH012
Pack file name :cfcard:/patch.pat
description ***Link-connected to Nashik NE40E-1***
ip address 10.118.234.53 255.255.255.252
ospf cost 10
ospf network-type p2p
ospf bfd enable
ospf bfd min-tx-interval 50 min-rx-interval 50
Increase the MTU size on MUX to 9726 i.e. max value. After setting it has been observed that OSPF state has become in FULL state.
After check it has been observed that MTU setting on MUX is 1500. On cheking the DD packet sent on interface it has been observed that its size is more than 1500. Thats why ospf can not exchange the DD packets properly.
OSPF Debug packets,
Frame 9 (1506 bytes on wire, 1506 bytes captured)
Ethernet II, Src: HuaweiTe_e4:1c:43 (00:18:82:e4:1c:43), Dst: IPv4mcast_00:00:05 (01:00:5e:00:00:05)
Internet Protocol, Src: 10.118.234.53 (10.118.234.53), Dst: 126.96.36.199 (188.8.131.52)
Open Shortest Path First
No. Time Source Destination Protocol Info
10 5.000519 10.118.234.53 184.108.40.206 LDP Hello Message