Cisco ASAv HA Configurations
Configuring high availability requires two identical ASAs connected to each other through a dedicated failover link and, optionally, a Stateful Failover link. The health of the active interfaces and units…
O Errors During TFTP Cisco IOS Image Copying
I were using TFTPD32 to transfer a image to Cisco 3560 switch. It was fine at the beginning then when it was almost done I got lots of O errors.…
Comparison of Cisco Integrated Services Routers: (1800,2800,3800) vs (1900,2900,3900) vs 4000
For Branch switches, please check Comparison of Cisco Switches: (2960 vs 3560), (Cisco 3560 X vs 3650 vs 3750-X vs 3850) Cisco 2900, 3900, and 4000 (4300 and 4400) Series…
Cisco Switch 2960 / 3560 Password Recovery Procedures
Worked on a used cisco switch 2960 which has been configured password. Following steps have been recorded how to get into recover mode. 1. Connect Console Cable Cisco provides a…
Comparison of Cisco Switches: (2960 vs 3560), (Cisco 3560 X vs 3650 vs 3750-X vs 3850)
For Branch Routers, please check Comparison of Cisco Integrated Services Routers: (1800,2800,3800) vs (1900,2900,3900) vs 4000 Cisco 2960 vs 3560 Switch 2960 series switches are L2 only switches. Meaning that…
Understadning Cisco Access-Lists on Switches: PACL, VACL, RACL and MACL
This ‘ACLs on Switches’ diagram shows PACL, VACL and RACL location and traffic direction on switch. It is clear and easy understanding. The following explanation is from Security Features on…
Steps to Upgrade Cisco ASA IOS and ASDM
Here are steps to upgrade IOS from 8.2(1) to 9.1(6) and ASDM to 7.5.2. It is simple and straightforward. By the way these steps are working for all PIX/ASA version…
Recover Cisco 4507 Switch from a Continuous Reboot
One of Cisco 4507R-E switch got a continuous reboot problem. It just got super engine replaced in the slot 3. During power on process, the console screen shows a rebooting…
Cisco IOS Router Hardening Template
Here is the my router configuration template modified from Team Cymru’s. !Without service nagle on a Cisco router, each character in a Telnet session is a separate CPU interrupt. Hence,…
Cisco IOS Switch Hardening Template
Here is my template for access layer switches in my environment. Some of blue color words will need to replace with your specific information. Red words will be the explanation…
Cisco 7600 Router Got Software Forced Crash During Booting
Symptoms: One of Cisco7606 Routers got a software crash during booting process. Here is output from console. System Bootstrap, Version 12.2(33r)SRD5, RELEASE SOFTWARE (fc1)Technical Support: http://www.cisco.com/techsupportCopyright (c) 2009 by cisco…
Using Cisco Mini USB Console Cable to Configure Cisco Switches and Routers
Cisco Device Mini USB Port Cisco has added mini usb port into their products for many years. The key to use this port is to get a right cable. At…