Change configuration registry on older Cisco routers
I ran across an ancient 2500 series router today and had to go through a password recovery. The rommon version was earlier than any I'd seen before. The help functionality was very lean. Here's how to set the confreg for these geezers.
If the rommon help screen (type H to see it) says to type O to look at the configuration registry, you set it like this:
o/r 0x2142
I manually power cycled after this and had success. When you get things working again, I suggest backing away very slowly and cautiously.
Also see ...
Assign or configure IP addresses on Cisco routers
H3Every active interface on a Cisco router to be used with IP requires an IP address assigned to it. This short recipe describes how to set an interface's IP address./H3PGiven an interface fastethernet1, the IP address 192.168.1.5 with the subnet mask 255.255.255.0 can be assigned to it using
H3Every active interface on a Cisco router to be used with IP requires an IP address assigned to it. This short recipe describes how to set an interface's IP address./H3PGiven an interface fastethernet1, the IP address 192.168.1.5 with the subnet mask 255.255.255.0 can be assigned to it using
Configure a Cisco VWIC card
H3Cisco VWIC cards need configuration before their serial ports will appear in the interface list. Once the VWIC configured, HDLC, frame relay, or ATM with an AIM processor can be configured./H3PThe Cisco VWIC cards can be configured with different channel groups to support different applicat
H3Cisco VWIC cards need configuration before their serial ports will appear in the interface list. Once the VWIC configured, HDLC, frame relay, or ATM with an AIM processor can be configured./H3PThe Cisco VWIC cards can be configured with different channel groups to support different applicat
Copy Cisco router config into flash to backup or replace hardware
H3When replacing a faulty router that is not completely dead, it may be possible to copy the startup configuration to the removable flash memory and swap the flash to get the new router up and configured in as short a time as possible. Without this procedure, it will be necessary to manually copy
H3When replacing a faulty router that is not completely dead, it may be possible to copy the startup configuration to the removable flash memory and swap the flash to get the new router up and configured in as short a time as possible. Without this procedure, it will be necessary to manually copy
Increase or change Cisco router log size
H3Messages logged by a router can make troubleshooting problems substantially easier. However, the default size of most Cisco routers is 4096 bytes which typically accomodates fewer than 60 messages. While this may help in many situations, adding some additional space can save the day when a rou
H3Messages logged by a router can make troubleshooting problems substantially easier. However, the default size of most Cisco routers is 4096 bytes which typically accomodates fewer than 60 messages. While this may help in many situations, adding some additional space can save the day when a rou
Configure ATM on a Cisco Router
H3ATM is growing in popularity as a wide area network (WAN) medium. ATM offers small cell size and strict quality of service, allowing voice, video, and data to coexist./H3PFirst, Terminology: br / br /VPI Virtural Path Identifier, 5 in this example br /VCI Virtual Circuit Identifie
H3ATM is growing in popularity as a wide area network (WAN) medium. ATM offers small cell size and strict quality of service, allowing voice, video, and data to coexist./H3PFirst, Terminology: br / br /VPI Virtural Path Identifier, 5 in this example br /VCI Virtual Circuit Identifie