We have been testing 15.1.1T on a couple of lab Cisco 1841 and Cisco 871 devices.
On the devices we are using EEM to automate the failover/failback process for a cellular modem attached to f3 on the 871 or f0/1 on the 1841. One of the EEM applets we use fires from a cron timer event that occurs every 10 minutes on the router.
IOS revision 12.4(22)T we had no problems with using the cron-timer triggered applet (every 10 minutes between 7am to 10pm), except for the fact that every command issued by EEM required AAA authentication. The EEM applet is causing our routers to saturate our Cisco ACS servers (we use 700+ routers in the field, all exectuing this EEM script) with single-connect requests. We will refer to the cron-timer executed applet as 'Maintenance' from here on out.
As of 15.1(1)T the addition to bypass the AAA authentication process became available. This was a huge speed increase to our EEM applets, specifically the Maintenance applet. I will include the applet for clairity.
action 050 cli command "end" action 051 cli command "exit" action 052 exit action 053 end action 054 end
This script is designed to look for a couple of routes in the IP routing table, and populate two variables (bgpstate and wireless) with the regular expression matching result of the show ip route commands. It uses track 1 to determine the up/down status of Serial0/0/0 which is the primary T1 interface for WAN services on the router. The wireless is "up/1" if the static route to 22.214.171.124 is present in the show ip route output (only when f0/1 is up in this case). The T1 is "up/1" if the default route passed to the IP routing table is present in the show ip route output.
Before the upgrade to 15.1(1)T these scripts ran without issue, and we had no errors. Now after the upgrade, anytime this script fires and the show ip route match for the wireless variable is 1 instead of zero, it begins to run through the else condition starting at action 031, and during the second execution of the script every 10 minutes (I still have not figured out how to force the cron-timer to fire only ONCE per minute, instead of at the beginning and end of the minute), the router will generate spurious memory errors, and sometimes crash or reboot.
This all began with 15.1(1)T, and I have not seen any caveats or other entries that could possibly point to the cause of this problem. Any ideas?
I am also attaching a crash file from one of the routers like this one so you can see what I mean.
All of these devices are running the advipservices k9 version of this IOS.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
Im studying the 100-105 book by Odom and am currently on the topic of Port security. I purchased a used 2960 and I'm trying to follow a...
While deploying a number of 18xx/2802/3802 model access points (APs), which run AP-COS as their operating platform. It can be observed on some occasions that while many of their access points were able to join the fabric WLC withou...
I am going to design and build an LAN network under a tunnel underground with long distance between the switches.
I will have 2 Catalyst switches and 8 Industrial IE3000, and they will be connected with fiber.
For now I am planning on use Layer-2 s...