Archive | Routing & Switching

netmiko support for Brocade ICX and MLXe

netmiko is a “Multi-vendor library to simplify Paramiko SSH connections to network devices,” written by Kirk Byers. It doesn’t solve all of your pain with dealing with CLI-only network devices, but it tries to at least take away the low-level hassle of setting up a connection, and handling variations with things like enable mode, line-breaks, […]

Continue Reading

VRRP Skew Time (and always be learning…)

It’s funny how you can work with something for years, but miss a small detail. This week I learnt about Skew Time for VRRP. The reason for it is completely obvious once you think about it, but for some reason the detail had escaped me for all these years. VRRP Hellos VRRP sends out a “hello” […]

Continue Reading

NZ IPv6 & DNSSEC Update

A year ago I published a table of New Zealand ISP IPv6 support. At the time support was fairly poor. I’m pleased to report that things have gotten better over the last year. There has also been a very pleasing uptick in DNSSEC support. IPv6 Changes The big movers here are Trustpower & Orcon, who have both […]

Continue Reading

Brocade VDX SNMP Changes

Brocade tightened up some SNMP settings with NOS 6.0.x. This improves security, but it also means that you will need to modify your configuration if you upgrade. If you don’t, SNMP won’t work, and you’ll get errors with BNA/Nagios/Cacti/etc. Here’s the changes, and how to get SNMP working with NOS 6.0.x. NB This applies to […]

Continue Reading
influxdb-logo

Using InfluxDB + Grafana to Display Network Statistics

I loathe MRTG graphs. They were cool in 2000, but now they’re showing their age. We have much better visualisation tools available, and we don’t need to be so aggressive with aggregating old data. I’ve been working with InfluxDB + Grafana recently. Much cooler, much more flexible. Here’s a walk-through on setting up InfluxDB + […]

Continue Reading

IPv6-based Wi-Fi Hotspots

Apple’s 2015 WWDC event included a great session on IPv6 & TCP changes coming with iOS 9. There is a related post to the IETF v6ops mailing list here. The new IPv6 hotspot is very interesting to me. These are my notes on how hotspot functionality can work with IPv6, and no NAT. IPv4 Hotspot […]

Continue Reading
Brocade Logo

Brocade PyNOS Python Libraries

PyNOS v1.1 has been published. This is a python library that simplifies automating Brocade VDX systems. It is built on top of ncclient, and uses NETCONF to communicate with the VDX systems. Using the libraries is much simpler than writing your own NETCONF calls. What can I do with it? Use Python to script configuration or […]

Continue Reading

IPv6-test.com and SRX firewall policies

ipv6-test.com is a useful site for testing IPv4 & IPv6 connectivity. It checks that v4 & v6 are working as expected, and reports your browser v4/v6 preferences. It does have one oddity with ICMPv6 tests. Here’s what I did to work around it with my SRX setup. The site runs a suite of tests and gives […]

Continue Reading