上次我一不小心将壹台Cisco2610路由器的flash memory删除了
#erase flash
后来我查到下面这篇文章才解决这个问题：
This document explains how to download a software image to a Cisco 260
0 using Trivial File Transfer Protocol (TFTP) over the first LAN port
via the tftpdnld ROMMON command.
Notes:
The ROMMON TFTP transfer works on the first LAN port only; however, fo
r the Cisco 2612, you can choose the Token Ring or Ethernet port.
You can only download files to the router. You cannot use ROMMON TFTP
to get files from the router.
Does not support source route bridging on Token Ring ports.
Operation
First, you must set ROMMON environment variables prior to the TFTP dow
nload. All variable names are case sensitive.
You can view the ROMMON environment variables by using the set command
, as shown below:
rommon 3 set
PS1=rommon !
IP_ADDRESS=172.18.16.76
IP_SUBNET_MASK=255.255.255.192
DEFAULT_GATEWAY=172.18.16.65
TFTP_SERVER=172.18.16.2
TFTP_FILE=quake/rel22_Jan_16/c2600-i-mz
The variables to set for tftpdnld are shown below:
usage: tftpdnld
Use this command for disaster recovery only to recover an image via TF
TP.
"tftpdnld" has no arguments. Monitor variables are used for arguments.
(Syntax: "VARIABLE_NAME=value" and use "set" to show current variables
.)
"ctrl-c" or "break" stops the transfer before flash erase begins.
The following variables are REQUIRED to be set for tftpdnld:
IP_ADDRESS: The IP address for this unit
IP_SUBNET_MASK: The subnet mask for this unit
DEFAULT_GATEWAY: The default gateway for this unit
TFTP_SERVER: The IP address of the server to fetch from
TFTP_FILE: The filename to fetch
The following variables are OPTIONAL:
TFTP_VERBOSE: Print setting. 0=quiet, 1=progress(default), 2=verbose
TFTP_RETRY_COUNT: Retry count for ARP and TFTP (default=7)
TFTP_TIMEOUT: Overall timeout of operation in seconds (default=2400)
TFTP_CHECKSUM: Perform checksum test on image, 0=no, 1=yes (default=1)
rommon 14
The variables to set for Token Ring are shown below:
TR_1E1R_PORT On the Cisco 2612, this variable sets the Token Ring or E
thernet port.
0 = use Ethernet port
1 = use Token Ring port
Default is 0
TR_SPEED_MODE For a Token Ring port, this variable sets the ring speed
and duplex mode.
0 = 4 Mbps half-duplex mode
1 = 4 Mbps full-duplex mode
2 = 16 Mbps half-duplex mode
3 = 16 Mbps full-duplex mode
Default is 2
The variables to set for Fast Ethernet are shown below:
FE_SPEED_MODE 0 = 10 Mbps half-duplex mode
1 = 10 Mbps full-duplex mode
2 = 100 Mbps half-duplex mode
3 = 100 Mbps full-duplex mode
4 = auto-negotiation
Default is 4
You must use the sync command to save ROMMON environment variables to
nonvolatile RAM (NVRAM).
Example:
rommon 16 IP_ADDRESS=171.68.171.0
rommon 17 IP_SUBNET_MASK=255.255.254.0
rommon 18 DEFAULT_GATEWAY=171.68.170.3
rommon 19 TFTP_SERVER=171.69.1.157
rommon 20 TFTP_FILE=c2600-is-mz.113-2.0.2.Q
rommon 21 tftpdnld
IP_ADDRESS: 171.68.171.0
IP_SUBNET_MASK: 255.255.254.0
DEFAULT_GATEWAY: 171.68.170.3
TFTP_SERVER: 171.69.1.129
TFTP_FILE: c2600-is-mz.113-2.0.3.Q
Invoke this command for disaster recovery only.
WARNING: all existing data in all partitions on flash will be lost!
Do you wish to continue? y/n: [n]: y
Receiving c2600-is-mz.113-2.0.3.Q from
171.69.1.129 !!!!!.!!!!!!!!!!!!!!!!!!!.!!
File reception completed.
Copying file c2600-is-mz.113-2.0.3.Q to flash.
Erasing flash at 0x607c0000
program flash location 0x60440000
rommon 22
注意上面文字的大小写问题，大写的IP ADDRESS等一定要用大写
否则系统不认的。