Configuring Packet Parameters - Foundry Networks Switch and Router Installation And Configuration Manual

Foundry Switch and Router Installation and Configuration Guide
6. Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change
to the startup-config file on the device's flash memory.
Using a DNS Name To Initiate a Trace Route
Suppose you want to trace the route from a Foundry Layer 3 Switch to a remote server identified as NYC02 on
domain newyork.com. Because the newyork.com domain is already defined on the Layer 3 Switch, you need to
enter only the host name, NYC02, as noted below.
USING THE CLI
BigIron# traceroute nyc02
Syntax: traceroute <host-ip-addr> [maxttl <value>] [minttl <value>] [numeric] [timeout <value>]
[source-ip <ip addr>]
The only required parameter is the IP address of the host at the other end of the route. See the Foundry Switch
and Router Command Line Interface Reference for information about the parameters.
After you enter the command, a message indicating that the DNS query is in process and the current gateway
address (IP address of the domain name server) being queried appear on the screen:
Type Control-c to abort
Sending DNS Query to 209.157.22.199
Tracing Route to IP node 209.157.22.80
To ABORT Trace Route, Please use stop-traceroute command.
Traced route to target IP node 209.157.22.80:
IP Address
207.95.6.30
NOTE: In the above example, 209.157.22.199 is the IP address of the domain name server (default DNS
gateway address), and 209.157.22.80 represents the IP address of the NYC02 host.
USING THE WEB MANAGEMENT INTERFACE
1. Log on to the device using a valid user name and password for read-only or read-write access. The System
configuration panel is displayed.
2. Click on the plus sign next to Command in the tree view to list the command options.
3. Select the Trace Route link to display the Trace Route panel.
4. Enter the host name or IP address in the Target Address field.
NOTE: You can use the host name only if you have already configured the DNS resolver for the domain that
contains the host.
5. Optionally change the minimum and maximum TTLs and the Timeout.
6. Click on Start to begin the trace. The trace results are displayed below the Start and Abort buttons.

Configuring Packet Parameters

You can configure the following packet parameters on Layer 3 Switches. These parameters control how the Layer
3 Switch sends IP packets to other devices on an Ethernet network. The Layer 3 Switch always places IP packets
into Ethernet packets to forward them on an Ethernet port.
• Encapsulation type – The format for the Layer 2 packets within which the Layer 3 Switch sends IP packets.
• Maximum Transmission Unit (MTU) – The maximum length of IP packet that a Layer 2 packet can contain. IP
packets that are longer than the MTU are fragmented and sent in multiple Layer 2 packets.
15 - 24
Round Trip Time1
93 msec
Round Trip Time2
121 msec
December 2000