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#PYTHONCHECK ETHERNET STATUS HOW TO#
#PYTHONCHECK ETHERNET STATUS SERIES#
#PYTHONCHECK ETHERNET STATUS MAC#

The command output displays all network layer (Layer 3) devices, such as routers, that the traffic passes through on the way to the destination. You can use IP traceroute to identify the path that packets take through the network on a hop-by-hop basis.

#PYTHONCHECK ETHERNET STATUS HOW TO#

The next two sections describe how to use IP traceroute. To identify a Layer 2 path, perform one of these tasks in privileged mode: The Layer 2 Traceroute utility does not work with Token Ring VLANs, or when multiple devices are attached to one port via hubs, or when multiple neighbors are on a port.The maximum number of hops an l2trace query will try is 10 this includes hops involved in source tracing.The source and destination switches must belong to the same VLAN.

#PYTHONCHECK ETHERNET STATUS MAC#

If the source and destination belong to multiple VLANs and you specify MAC addresses, you can also specify a VLAN.

You can trace a Layer 2 path by specifying the source and destination IP addresses (or IP aliases) or the MAC addresses.

All switches in the path must be reachable from each other.

You can use this utility from a switch that is not in the Layer 2 path between the source and the destination however, all of the switches in the path, including the source and destination, must be reachable from the switch.(See "Configuring CDP," for information about enabling CDP.) If any devices in the path are transparent to CDP, l2trace will not be able to trace the Layer 2 path through those devices.

#PYTHONCHECK ETHERNET STATUS SERIES#

You must enable CDP on all of the Catalyst 4000 family, Catalyst 5000 family, and Catalyst 6500 series switches in the network.

The Layer 2 Traceroute utility works for unicast traffic only.

This section lists the guidelines for the Layer 2 Traceroute utility: Information is displayed about all Catalyst 4000 family, Catalyst 5000 family, and Catalyst 6500 series switches that are in the path from the source to the destination. This utility determines the path by looking at the forwarding engine tables of the switches in the path. The Layer 2 Traceroute utility allows you to identify the physical path that a packet takes from a source to a destination. This example shows how to check module status on a Catalyst 2948G switch: For example, on a Catalyst 2948G series switch, the 24 Fast Ethernet ports belong logically to module 2. You must apply configuration commands to the appropriate module. The Catalyst 4912G, 2948G, and 2980G switches are fixed-configuration switches, but are logically modular.

You can use the argument to specify a particular module number to see detailed information on that module.

You can see what modules are installed, as well as the MAC address ranges and version numbers for each module, by using the show module command. The Catalyst enterprise LAN switches are multimodule systems. Using Secure Shell Encryption for Telnet Sessions.This chapter consists of these major sections: Note For complete syntax and usage information for the commands used in this chapter, refer to the Command Reference-Catalyst 4000 Family, Catalyst 2948G, and Catalyst 2980G Switches.