Ping Snoop; Packet Capture Tool - Avaya 8800 Troubleshooting Manual

traffic correctly. When an RMT is configured on an interface, do not configure the same
interface as a local "mirroring port". This causes packet corruption on the locally mirrored
traffic. The RMT port is exclusively used in remote mirroring tunnel. The remote mirroring
destination/termination port should be disabled to perform local mirroring.

Ping Snoop

You can use Ping Snoop to help troubleshoot MultiLink Trunking (MLT) and Split MultiLink
Trunking (SMLT) networks. Ping Snoop displays the route that IP traffic takes over an MLT or
SMLT path. Ping Snoop enables a filter that copies Internet Control Message Protocol (ICMP)
messages to the CPU. The CPU then monitors the ICMP stream. The console displays the
port that is used for each IP traffic flow from source to destination station. There is no
mechanism to prevent line-rate ICMP traffic from going to the CPU as a result of enabling Ping
Snoop.
For R and RS/8800 modules, there is a pre-configured Ping Snoop ACT and ACL. If you have
an R series module installed, you must use the ACL filter option.
Create a Ping Snoop filter by specifying a source and destination IP address. Then specify the
ports on which you want to enable Ping Snoop. Only one Ping Snoop filter is supported on a
port. If an ICMP request is received on any of the added ports, the source and destination IP
address and the port on which the packet was received appear on the management
console.
Ping Snoop uses one of the available global filters (0–7). If eight global filters are configured
on a port prior to enabling ping snoop, Ping Snoop cannot be enabled for a port. You must
remove at least one of the global filters to enable Ping Snoop.
By design, Ping Snoop configurations are not saved to the configuration file and are deleted
by resetting the switch. Your Ping Snoop configuration is erased if you log off and then log on
under a different security level.

Packet Capture Tool

The Packet Capture Tool (PCAP) is a data packet capture tool that captures ingress and egress
packets on selected I/O ports. PCAP captures, saves, and downloads one or more traffic flows
through the Avaya Ethernet Routing Switch 8800/8600. The captured packets can be analyzed
offline during troubleshooting . PCAP is based on the mirroring capabilities of the I/O ports.
PCAP requires the Advanced Routing License. For more information about licensing, see
Avaya Ethernet Routing Switch 8800/8600 Administration, NN46205-605.
All captured packets are stored in the Secondary CPU, used as the PCAP engine. The Master
CPU maintains its protocol handling and is not affected by any capture activity.
Troubleshooting
Ping Snoop
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