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Cell Relay Retreat>MPLS-OPS Archive>month:2002-May> msg00138



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After MPLS switching.,OSPF poroblems occurs

  • From: "Mehmet ILGAZ" <mehmetilgaz@turk.net>
  • Date: Fri, 17 May 2002 00:39:01 +0300
  • Importance: Normal
  • Resent-Date: Thu, 16 May 2002 18:24:43 -0400
  • To: <mpls-ops@mplsrc.com>


We migrated to MPLS network but we have serious problem described
below.Our routers are Cisco 7513.
Our strucrue is simple shown as:

Router A75 ----------ATM/E3--------Router T3-----fast ethernet---Router
T2
    |								|
 PVC (19 PVC)							E1-G703
HDLC
155 ATM


When we enable mpls switching on the interface between Router A75 and
Router T3  and on the link between T3 and T2 we receive a packet loss on
the ATM PVC on router A75 which is on a non mpls switching interface and
also on a E1 port on Router T2. We also see OSPF header problems. Below
is the debugs from router A75.



A75#
.May 15 06:45:19: %OSPF-4-ERRRCV: Received invalid packet: Bad Checksum
from 212.57.31.90, ATM2/1/0.11 .May 15 06:45:24: %OSPF-4-BADLENGTH:
Invalid length 80 in OSPF packet from 212.57.29.186 (ID 76.32.180.140),
ATM2/1/0.3 May 15 06:45:34: %OSPF-4-BADLENGTH: Invalid length 1214 in
OSPF packet from 212.57.29.186 (ID 76.105.104.195), ATM2/1/0.3 May 15
06:45:40: %OSPF-4-ERRRCV: Received invalid packet: Bad Checksum from
212.57.31.246, ATM2/1/0.16 May 15 06:45:40: %OSPF-4-BADLENGTH: Invalid
length 1031 in OSPF packet from 212.57.31.174 (ID 31.119.87.209),
ATM2/1/0.2 


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