How to Be A Continuous Testing Hero
CT ensures that a new feature is tested at every stage from planning to design.
Common Criteria: Certified Products Galore!
If you track the WLAN security oriented certifications closely, you may have noticed that Ruckus was recently certified for Common Criteria.Junos MTU Handling on Access & Trunk Ports)
MTU is most important aspect for proper functionality of any application. In this blog post I will highlight MTU handling by Junos based devices for (802.3 un-tag and 802.1Q tag packets) .
Simple 802.3 packet header is shown above total packet size is 1514 bytes (14 bytes header + 1500 bytes max payload). Now we will see how Junos based devices handle MTU on access ports.
- LAB> show interfaces xe-1/0/32
Physical interface: xe-1/0/32, Enabled, Physical link is UpLink-level type: Ethernet, MTU: 1514, MRU: 0, Link-mode: Auto, Speed: Auto, BPDU Error: None, MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Disabled, Auto-negotiation: Disabled,
———-output omitted for brevity——————–
Protocol eth-switch, MTU: 1514 - LAB > monitor traffic interface xe-1/0/32 no-resolve layer2-headers print-hex 02:09:00.266841 Out 00:31:46:52:dd:80 > 00:1e:0b:d3:1d:1a, ethertype 802.1Q (0x8100), length 1486: vlan 243, p 0, ethertype IPv4, truncated-ip – 32 bytes missing!
(tos 0x0, ttl 64, id 49385, offset 0, flags [DF], proto: ICMP (1), length: 1500)
192.168.243.1 > 192.168.243.52: ICMP echo reply, id 29316, seq 5, length 1480
- As we can see an access interface “xe-1/0/32″ showing MTU 1514 but when we monitor traffic on Continue reading
Integrating RHV & OpenStack with Neutron
Hi folks, I recently posted an article on one of the official Red Hat blogs about the new Neutron integration between RHV and RHOSP. I have to say it’s very cool and might change the way you look at networking capabilities in RHV, at least if you’re also using RHOSP in the same data center.
As a side note, I’ve mentioned my friend and colleague, Tony James in recent posts and he makes another appearance this week. He helped pull together the configuration steps as well as the demo that we recorded. Big kudos to to “Big T”.
Back to the actual integration. If you don’t want to look at the other article, the condensed version of “why should you might care” is as follows:
- Run applications across RHV & RHOSP – front end of the app on RHOSP and the back end on RHV using the Neutron integration to bridge the network gap.
- Add SDN capabilities to RHV via the Neutron integration, even if the app only exists in RHV.
- Manage the SDN network topologies for both RHV and RHOSP from a single management space (web or programmatic).
Those are the 3 big use cases, in a nutshell. If Continue reading
Saving Backup/Rescue Config on Juniper
A lot of times I find myself having to back a config up on a Juniper before I start work. Usually, I want a quick point I can restore to if I need to rollback. So enter rescue configurations to the, errr, rescue?
request system configuration rescue save
This saves the current saved system configuration as a rescue configuration you can easily rollback to with.
#rollback rescue
#commit
You can also save the current configuration to file using:
>file copy /config/juniper.conf.gz /var/tmp/temp_backup.cfg
/config/juniper.conf.gz is synonymous with the current running configuration.
Potentially, you could stash files in /var/tmp/ and restore them using the above. And restore using your backup with #load replace /var/tmp/temp_backup.cfg
View your stashed files using file list /var/tmp
Docker Networking: Introduction to Microservices and Containers
Dinesh Dutt started his excellent Docker Networking webinar with introduction to the concepts of microservices and Linux containers. You won’t find any deep dives in this part of the webinar, but all you need to do to get the details you’re looking for is to fill in the registration form.