Recently a posted a question to Twitter about connecting two Cisco Catalyst switches. One switch has already booted and has the following configuration: The other switch is connected to Gi1/0/48 and has just been powered on. It has no configuration
IPv6 Support in VRF on Catalyst 3k
I was looking for information on running IPv6 in VRF on the Catalyst 3k platform and there wasn’t much information available. I tried running IPv6 in VRF on Catalyst 3560 with correct SDM profile but got this error message: Switch(config-vrf)#address-family
Nasty Multicast VSS bug on Catalyst 4500-X
I ran into an “exciting” bug yesterday. It was seen in a 4500-X VSS pair running 3.7.0 code. When there has been a switchover meaning that the secondary switch became active, there’s a risk that information is not properly synced
Catalyst 3750 IPv6 ACL Limitations
I recently ran into some limitations of IPv6 ACLs on the Catalyst 3750 platform. I had developed an ACL to protect from receiving traffic from unwanted address ranges such as ::, ::1, ::FFFF:0:0/96. The first address is the unspecified address,
Why fast IGP timers aren’t always beneficial
Introduction When tuning your IGP of choice, the first thing people look at is usually the hello and dead interval. This is a flawed logic, it is true that it can help in certain cases but convergence consists of much
Cisco updates the Catalyst 2960 – Catalyst 2960-X and Catalyst 2960-XR
The Catalyst 2960 is a very common switch in any environment that has Cisco devices. A couple of years ago the 2960 got stacking via the 2960-S model. It also got the ability to do static routes which was a
Cisco releases new switch – Catalyst 3850
Cisco is releasing a new Catalyst switch and it will be called 3850. Some of you might already have heard about it. I’ve seen some presentations about it but now it’s offical. Lets look at some of the highlights of
Catalyst QoS – A deeper look at the egress queues
I’ve done a post earlier on Catalyst QoS. That described how to configure the QoS features on the Catalyst but I didn’t describe in detail how the buffers work on the Catalyst platform. In this post I will go into
Catalyst QoS
I’m back studying and I have already booked a new lab date. I won’t make an announcement until I get back. This is to keep a bit of the pressure off from taking the lab. The last couple of days