Documenting malformed and unexpected packets

If the manufacturer of the routing application cannot provide documentation that indicates that it is sending the malformed or unexpected packets that are being received by OMPROUTE , the following documentation is available for initial diagnosis.

A network sniffer trace.
The data set that contains the IP packet trace (SYSTCPDA), unless the packet trace is being redirected to the TCP/IP address space. See TCP/IP services traces and IPCS support for more information.
The data set that contains OMPROUTE trace and debug information. If OMPROUTE trace and debug information is being redirected to the OMPROUTE CTRACE internal buffer, this buffer is included in a dump of the OMPROUTE address space. See OMPROUTE traces and debug information for more information.
Output from the appropriate OMPROUTE DISPLAY commands as described in z/OS Communications Server: IP System Administrator's Commands.

If the malformed or unexpected packets that are being received are IPv4 OSPF packets, use the following commands to display your IPV4 OSPF interfaces and neighbors:

DISPLAY TCPIP,,OMPROUTE,OSPF, INTERFACES
DISPLAY TCPIP,,OMPROUTE,OSPF, INTERFACE,NAME=if_name
DISPLAY TCPIP,,OMPROUTE,OSPF,NEIGHBOR
DISPLAY TCPIP,,OMPROUTE,OSPF,NEIGHBOR,IPADDR=ip-addr

If the malformed or unexpected packets that are being received are IPv6 OSPF packets, use the following commands to display your IPv6 OSPF interfaces and neighbors:

DISPLAY TCPIP,,OMPROUTE,IPV6OSPF, INTERFACES
DISPLAY TCPIP,,OMPROUTE,IPV6OSPF, INTERFACE,NAME=if_name
Note: ID=if-id can be used instead of NAME=if_name
DISPLAY TCPIP,,OMPROUTE,IPV6OSPF,NEIGHBOR
DISPLAY TCPIP,,OMPROUTE,IPV6OSPF,NEIGHBOR,ID=router-id
Note: Specify IFNAME=if_name if the neighbor that is specified by the ID parameter has more than one neighbor relationship with OMPROUTE (for example if there are multiple IPv6 OSPF interfaces that connect OMPROUTE to the neighbor).

When applicable, you can use a SLIP on the OMPROUTE error message that is reporting the receipt of the malformed or unexpected packet to capture the OMPROUTE trace and debug information and the dump of the TCP/IP address space that contains the IP packet trace at the time of the error.