XenServer and Multicast with IGMP support
Today I tried to add a virtual Terminal Server within a XenServer to a NLB cluster. The current NLB cluster contained only physical servers. When adding the virtual server to the NLB cluster with the NLB manager, the server lost all IP communication. It isn’t possible to connect to or from the server. Together with … Read More
Upgrading Cisco switch stack
I always upgrade a switch stack with one single command. Last week I received a call from a customer with the question about the upgrade procedure for a switch stack. The customer wanted to upload the image separately to every single switch. I told him that he could upgrade all switches at once. Since I … Read More
Cisco stack: version mismatch
When adding a new switch to an existing stack, the new switch should have the same software image as the existing stack member switches. If the new switch has different software, the switch isn’t capable of joining the stack. Switch/Stack Mac Address : 588d.0918.3100 H/W Current Switch# Role Mac Address Priority Version State ———————————————————- *1 … Read More
Cisco ASA: web interface not working
I had to troubleshoot a Cisco ASA today, where the client wasn’t able to connect to the management web interface anymore via https. The customer didn’t install ASDM locally, but always starts the Java-based version. After upgrading the Cisco ASA to software version 8.2(1) and a reboot, the client wasn’t able to connect to the … Read More
Cisco Connect – Software Download Entitlement Controls
I read about it on the internet and last week I received the “official” mail from the Cisco Partner Channel about the changes regarding the Software Download Centre Entitlement Controls. The e-mail (in Dutch) can be found below. I have different feelings about the changes regarding the software entitlements. It isn’t possible anymore to just … Read More
AutoQos error while generating commands
First of all, the post isn’t about explaining QoS. Configuring AutoQos on Cisco switches should be very easy. At least, that is what all the Cisco documentation tells you. I always thought that the statements about configuration AutoQos were true, but a few days ago I would disagree. I was configuring multiple switches, Cisco Catalyst … Read More