Welcome to IOS 15, Feature licensing and complicated maintenance procedures….
Cisco Announces EOS and EOL Cisco IOS Software Release 12.4
13 January 2010 By 3 Comments
Cisco announces the End of Life and End of Support dates for 12.4. Before IOS 15.0 is even warming up, the previous version of 12.4 is already on life support.
The Poor Man’s IOS Traffic Generator
19 September 2009 By 7 Comments
IOS CLI: Show Run Linenum
9 September 2009 By 4 Comments
Cisco IOS Order of Operation – Updated, Again
9 September 2009 By 12 Comments
I often need to refer to the IOS order of operation when I start stacking multiple functions in an IOS configuration.
Changing the Break Character in Cisco IOS
21 August 2009 By 8 Comments
IOS: Setting the TCP Timeout on IOS
14 August 2008 By 1 Comment
IOS: Enable and …. Disable ?
20 July 2008 By 1 Comment
IOS: ROMMON on the C6500/Sup720 – Lesson Learned
28 June 2008 By Leave a Comment
IOS: Reverse SSH Console Access – Part 2
25 June 2008 By 5 Comments
Following my original post about configuring Reverse SSH on a Cisco console server, I wanted to make some followup to extend the usage.
Configuring Windows 2003 / XP SP2 to Use IOS NTP Server
10 June 2008 By 7 Comments
In certain networks, it is difficult to get the time on your servers to be exactly the same as the NTP time on your network equipment. In this case, you want to force the Windows servers to use the same NTP Network time source as your routers and switches. But Microsoft Windows doesn’t understand NTP [...]
IOS:Open Source Lab DNS and IP Addressing
2 June 2008 By 1 Comment
A number of Cisco Bloggers have talked about making labs available for others to use. However, part of what will be needed is some conventions to make these labs work for the largest number of people. Following Ivan Pepelnjak posting on Private Domain Names, and an earlier posting that I made on Reserved IP Address [...]
IOS: Reverse SSH Console Access
29 May 2008 By 6 Comments
I recently needed to secure the reverse console access using Cisco IOS router. Now for many years, we have been doing this over telnet and the configuration has been straightforward. But configuring it to support SSH instead of telnet is a little bit different, awkward in fact.
Ip Tcp Timestamp
14 April 2008 By Leave a Comment
Bidirectional Forwarding Detection [Cisco IOS Software] – Cisco Systems
8 March 2008 By Leave a Comment
BFD is a most useful feature of IOS, and IMHO, a much unloved feature. I notice that latest releases of IOS now have BFD for static routing, but more importantly now supports HSRP standby bfd Example: Router(config-if)# standby bfd (Optional) Enables HSRP support for BFD on the interface standby bfd all-interfaces Example: Router(config)# standby bfd [...]
Single Internet Connection but HA Infrastructure – Using Bridging Instead of Routing
20 February 2008 By 1 Comment
The customer had decided to build a hosting platform, but could only arrange for a single internet connection to that site due to location. However, all other hardware was duplicated for high availability. After considering the options the following diagram was prepared showing the first pass at the design. This was the Internet Connection (100Mb Ethernet) connected to the router, then connected to a switch, which was interconnected by trunk to a second switch. The first layer of firewalls is then connected.
Cisco ASA and IOS Command Tip – Test Aaa-Server
18 February 2008 By Leave a Comment
