So after a long and at times stressful night, we finally finished all the tasks we had planned. The second I stepped into the office at 10pm it was all work up until about 8am. I never experienced time fly by as fast as it did. It is almost surreal to think about. So here is a breakdown of my night from start to finish.
Upon getting in I immediately had to start some preliminary work on the floor switches. Basically logging into each one and setting them to vtp transparent mode and saving the configs. One of our older buildings was still using the vtp client/server model so we figured this would probably be the best time to change everything to transparent. After that task was completed I had to run one of our backup internet lines to a 3750 (which hung off the Nexus). At the time the backup line was attached to the 6509 so running the cable to the Nexus cabinet wasn’t much of an issue. It’s about 12am at this point and this is where the fun begins!
So in Phase 1 we are still leaving the 6509s in our network, the only change we are making is that instead of the 6509s running layer 3 they will be made layer 2, and the layer 3 will go to the Nexus. So in order to introduce the Nexus to the network we needed to connect the Nexus to the 6509s. Basically we did this by creating an 8Gb port channel between the Nexus and the 6509. We also increased the connection between our two 6509s from 2Gb to 4Gb. After that it was smooth sailing. We shutdown vlans on the 6509s one at a time and brought them up on the Nexus.
Now that layer 3 has been moved completely to the Nexus it was time to migrate a blade server and a single floor switch. We have a a stack of 3750s in the Nexus rack that is dedicated for blade center aggregation. The blade center has 2 switch cards on the back of it with 4 ports each. So on the 3750s I created 2 port channels going to each switch module on the blade server. Super smooth and had no issues. Well there was one issue, a port on the switch module had gone into err-disabled. A quick shut no shut quickly fixed the port channel link. Next came the floor switch. The floor switch currently was running at 1Gb and we needed to migrate it to 10Gb. Here I changed the modules on the 3750 floor switch to be 10Gb capable and copied the trunk link configs to the 10Gb interfaces. I then created a port channel from both interfaces. Again no issues
So that is basically a breakdown of the entire night. I am going to spare you a lot of the boring details that happened throughout the night. Reason being is that I don’t want to relive them again lol. The next step in our network migration now is finish migrating the rest of our blade centers as well as moving the rest of our floor switches.