Spanning-Tree between HP Comware and Cisco

In the past, I had many problems with a heterogene infrastructure containing HPE 5000 Comware devices and Cisco Catalyst switches. I couldn’t get Multiple Spanning-Tree (MSTP) on the run (same revision number, same case-sensitive region-name). So we decided to go on with Per VLAN Rapid Spanning-Tree. But this also didn’t work, also no other VLANs that … Read more

Using 40GE QSFP to 4x 10GE SFP+ splitter cable

Today I was very frustrated when I connect a 40GE QSFP to 4x 10GE SFP+ splitter cable to a HPE FlexFabric 5700 48G 4XG 2QSFP+ switch (JG894A). I received the following message: [HPE]%Jan 8 19:02:19:652 2011 HPE OPTMOD/4/MODULE_IN: FortyGigE1/0/54: The transceiver is STACK_QSFP_PLUS_4SFP_PLUS. [HPE]%Jan 8 19:02:50:826 2011 HPE OPTMOD/3/TYPE_ERR: FortyGigE1/0/54: Transceiver type not supported! First reaction: … Read more

Build-up a redundant aruba wireless infrastructure

Currently I’m evaluating the aruba controller and access-points as a new product in my company. My goal was a high available system with two wireless controller and two access-points. I created a visio graphic for this, it also contains the ip addresses of our laboratory: I’m using two aruba 7008 RW (Rest of the World) mobility controller … Read more

HP Accredited Technical Professional (ATP) FlexNetwork Solutions v3 exam passed!

Phew… finally done the exam for the HP ATP – FlexNetwork Solutions (HP0-Y52). My teammate also passed the exam. We did the three-day training two weeks ago at HPE Böblingen. Next year I will head for HP Accredited Systems Engineer (ASE) FlexNetwork Architect v2 🙂

Enabling advanced CLI on HP v1910 Switches

I always thought, that the command line of the Comware OS based 1910/1920 switches are limited because they are “cheap”. But I found out to enable the full CLI to configure the devices like a 5000-series Switch. You can enable the full CLI with the following command: <HP 1920G Switch>_cmdline-mode on All commands can be … Read more

How to build an IRF-Stack with HP Switches 5xxx

IRF (Intelligent Resilient Framework) is an innovation from H3C. Hewlett-Packard has acquired the H3C switch-technology to build their new 5xxx series. This tutorial is based on the HP 5920AF-24XG Switch (JG296A) but it can be used also with 51xx/55xx switches. With IRF, you can virtualise all physical switches to one virtual-switch, so you have one management-ip, one switching- and … Read more

ICMPv6 ‘Multicast Listener Report’ flooding the network

Today I had a very big network problem! Since 4 o’clock a customer told us, that the network printers aren’t available and a wireless link to another location can’t be used anymore. I watched at the PRTG monitoring software and the network-ports from the HP switches were at high load/traffic:   and this was on every network port! So … Read more

Router on the edge

Good morning everyone! Today I want to explain a configuration for routing internal networks with a layer 3 routing switch and a router for accessing the internet. I call it “router on the edge”. The definition “edge router” is typically a router running EBGP (External Border Gateway Protocol) so I invent a new definition 🙂 … Read more