Tag: Cisco
Configuration Example, Routing
Cisco DHCP server & VRF
I had some issues while configuring some VRF’s on a Cisco router and using that router as a DHCP server. First of all the router wasn’t binding any DHCP request. The DHCP server configuration is defined below. ip dhcp pool guest vrf vrf-guest network 10.10.0.0 255.255.252.0 default-router 10.10.0.1 domain-name internet-only.nl dns-server 208.67.222.222 208.67.220.222 The configuration … Read More
Wireless controllers – the discussion continues
There is already a lot said and written about wireless controllers and it’s architectures. During my recent holiday my thoughts were wandering about this subject. At the beginning we had the stand-alone access-points, which were all configured as unique identities. Choosing the correct channel and power level could be a challenge in dense environments, so … Read More
Cisco WLC – Upgrade FUS image
Today I upgraded a FUS image on a Cisco WLC 5500 controller, because I also upgrade the WLC software to 7.2.103.0. The FUS upgrade is straightforward and comparable to a regular software update. The only difference is that you need console access to perform the upgrade. The FUS image upgrades the following components: Field Recovery … Read More
Cisco Spanning Tree Scalability
A colleague (Twitter: @Toonieh) mentioned spanning-tree scalability in a Cisco network. He had an article about this matter. All the credits on this post go to him. I found the article on internet and post it here to be able to find it quickly.. In a Layer 2 looped topology design, spanning tree processing instances … Read More
Configuration Example, Firewalling
Cisco ASA – Reset TCP connection
“Normal” TCP applications use a three-way handshake to establish a session. After data has been send the session is closed. Some legacy applications don’t always close a TCP session. They keep the session open, even when the session is idle for a long time (+ 2 hours). When the session is idle and a client … Read More
Cisco 888G with KPN 3G connection
Something I don’t see and don’t do very often is the configuration of a router including a 3G connection. So this blog post helps me during the process of configuring future connections. For todays configuration I am using the Dutch carrier KPN to establish the 3G connection. As hardware I am using a Cisco 888G … Read More