TMS zl Management and Configuration Guide ST.1.1.100430

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Troubleshooting

Basic Troubleshooting Tools

capture

The capture command collects the TCP packets transmitted to and from a

particular VLAN interface, a GRE tunnel, an HA interface, or all interfaces.

This command is useful for troubleshooting connection problems and moni-

toring network activity because it allows you to view all of the packets that

are being transmitted across a VLAN or HA interface or a GRE tunnel.

Capturing a VLAN interface captures all Layer 2 packets arriving on that VLAN

interface, regardless of whether the firewall access policies will later permit

or deny those packets. However, only permitted packets being sent from the

VLAN interface are captured. If a device in a VLAN tries to send packets that

are denied by the firewall access policies, these packets never actually reach

the VLAN interface so they are never captured.

You can send the capture output to the terminal, or you can save the output to

a pcap file.

You can enter the following command from either the manager-level context

or the global configuration context in the TMS zl Module’s CLI:

Syntax: capture < file | terminal > [vlan <id> | gre <tunnel name> | ha | any] <extended

options>

If you want to capture packets on a VLAN, include the vlan option and specify

a VLAN ID.

If you want to capture packets on a GRE tunnel, include the gre option and

specify the tunnel name.

If you want to capture packets for a high-availability (HA) interface, include

the ha option.

If you want to capture all packets, include the any option.

You can set extended options for capturing an interface by typing additional

keywords after the network interface. These extended options are shown in

Table 10-4.

show vlans show vlans [unassociated} Displays information about the TMS VLANs, including

the IP address of the VLAN and the zone to which it

belongs

If unassociated is included, displays VLANs that the

module has detected on the host switch but have not

been added to a zone

Command Syntax Description