03-01-2009 11:33 AM - edited 03-06-2019 04:19 AM
I have a 2801 primary rotuer with corrupt IOS.I'm trying to get this setup in rmon so I can ull an image from connected tftp server on another network.I have set it up but keep getting the same arp error.
rommon 30 > tftpdnld
IP_ADDRESS: 198.249.243.126
IP_SUBNET_MASK: 255.255.255.224
DEFAULT_GATEWAY: 198.249.243.125
TFTP_SERVER: 207.186.22.241
TFTP_FILE: /adp/c2801-advsecurityk9-mz.124-10c.bin
TFTP_MACADDR: 00:1d:70:14:97:f8
TFTP_VERBOSE: Progress
TFTP_RETRY_COUNT: 2
TFTP_TIMEOUT: 300
TFTP_CHECKSUM: No
FE_PORT: 0
FE_SPEED_MODE: Auto Detect
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
.
ARP: address resolution for 198.249.243.125 timed out.
ARP failed with failure code 1. TFTP transfer aborted.
.125 is the backup router with an attached internet connection which is up on all interfaces.
.126 is the down 2801.
I suspect this may have to do with the fact this router has two fa interfaces and rmon may be config'ing the wrong one.
I am sure the down router has a physical connection to switch.This was all up and running before IOS got corrupted.
Noticed also that from .125 router I cannot ping .126 which again leads me to believe it's not initializing the right
FA port.There are no rmon options to delect a specific FA port.
This is how it was configured just before IOS was corrupted.
interface FastEthernet0/0
description trunk port
no ip address
no ip redirects
no ip mroute-cache
duplex auto
speed auto
!
interface FastEthernet0/0.1
encapsulation dot1Q 1 native
no ip redirects
ip nat inside
no ip virtual-reassembly
no ip mroute-cache
!
interface FastEthernet0/0.75
encapsulation dot1Q 75
ip address 198.249.243.126 255.255.255.224
no ip redirects
ip nat inside
no ip virtual-reassembly
no ip mroute-cache
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
so why am I getting this ARP error ?
03-01-2009 11:45 AM
Based on doc, "If the router has two built-in Ethernet or fast Ethernet interfaces, always use the first interface (usually 0/0). You must use the built-in interface."
Since it is in rommon, the previous config should not be loaded.
Can you try to connect TFTP server in the same subnet?
By the way, what's that TFTP MAC, if they are in the different subnet, your router has no reason to need that info.
03-01-2009 01:53 PM
Do you have another 2801 physically nearby? You can use the Compact Flash from that to boot this one that's corrupt.
03-04-2009 04:52 PM
so you know - the answer was simply enabling spanning-tree portfast on the attached switchport.Thanks
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