Never Really Understood the Method

mrashby · ‎03-30-2006

All,

I ran the -show ip int brief- command on one of my routers and got this:

Interface Method

FastEthernet1/0 NVRAM

Serial1/0 TFTP

I cut the ouput short because I know what the other stuff means but what does Method mean and why is FastEthernet1/0 reading NVRAM for the Method and Serial1/0 reading TFTP?

Harold Ritter · ‎03-30-2006

Mario,

This refers to the method by which the interface was configured. In this case Fa1/0 was configured from NVRAM and se1/0 from a config downloaded from a TFTP server.

Hope this helps,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
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pkhatri · ‎03-30-2006

Hi,

The Method column refers to the source of the information that was used to create the interface.

The method field has the following possible values:

•RARP or SLARP—Reverse Address Resolution Protocol (RARP) or SLARP request

•BOOTP—Bootstrap protocol

•TFTP—Configuration file obtained from Trivial File Transfer Protocol (TFTP) server

•manual—Manually changed by CLI command

•NVRAM—Configuration file in nonvolatile RAM (NVRAM)

•IPCP—ip address negotiated command

•DHCP—ip address dhcp command

•unassigned—No IP address

•unset—Unset

•other—Unknown

So, for example, NVRAM means that the interface was present in the startup-config when the router had booted and TFTP means that the interface was created as a result of doing something such as 'copy tftp running-config'.

Hope that helps - pls rate the post if it does.

Paresh