Posted on in Networking
After cracking open a brand new Catalyst ME3400G, we weren't able to get it upgraded to the latest version of software. In fact, we couldn't even ping anything on the local subnet.
In order to use Cisco's Metro Ethernet switches, it's important to understand the new concepts that are introduced …
Posted on in Networking
For those still using the Cisco BWG as the ASN gateway in their WiMAX networks, Juda Barnes has discovered that the BWG 2.0 software suffers from a memory leak related to CEF. This memory leak is detailed in Cisco Bug CSCta09049. Unfortunately, since the Cisco BWG software has reached …
Posted on in Networking
I was recently part of a discussion regarding whether or not lowering the
load-interval on a Cisco router or switch interface from the default of 300
seconds had an impact on performance.
Both sides made good points, but
both were based on assumption and conjecture.
5 minute input rate 213000 …Posted on in Networking
Slaptijack reader Raj is looking for a way to limit inbound traffic on his switch ports based on the time of day. Specifically, he wants to restrict speed to 256 Kbps between 9 AM and 9 PM, and allow up to 1 Mbps the rest of the day. I've done …
Posted on in networking
For troubleshooting tips regarding the error message
%TAC+: no address for get_server see:
Troubleshooting "%TAC+: no address for get_server" on Cisco Devices.
While working with Cisco Catalyst IOS image 12.2(58)SE1, I noticed that configuration for TACACS+ had changed. My first clue that there was a problem was …
Posted on in Networking
If you've used Cisco switch clustering in a basic network (for example, when all switches are connected together and <acronym title="Cisco Discovery Protocol">CDP</acronym> is enabled), you've likely never considered how this switches communicate with each other. You might assume that the switches are using IP addresses from …
Posted on in Networking
For those that have been using Cisco IOS 12 forever, you may not have realized that Cisco has begun rolling out IOS 15. Although there are a lot of technical changes and features that are being introduced, IOS 15 introduces a new licensing scheme that may throw old users for …
Posted on in Programming
I've been working on a RADIUS client in Python that can send a disconnect message (packet of disconnect) to a Cisco router. I'm using pyrad 1.2 for the project.
I ran into this problem pretty quickly:
POD: 192.168.9.9 request queued
POD: Illegal authenticator in POD from …Posted on in System Administration
While doing some testing with Cisco Access Registrar (CAR) 5.0, I noticed that the test user had hundreds of old sessions hanging around:
--> query-sessions /r with-User X
Sessions with-User X for /Radius
Sessions for /Radius/SessionManagers/session-mgr-1:
S432 Key: 04000000000CF660, NAS: NAS.slaptijack.com, NAS-Port: 0, User-Name: X, Time …Posted on in Software
In a test lab, we ran into a situation where the connection between our Cisco Access Registrar (AAA) server and MySQL server was timing out. This forced the server to reconnect and resulted in the following errors:
name/radius/1 Error Server 0 ODBC client (DataSource 'my_odbc', Connection 8): SQLExecute …
