Blast from the past
I remember using this when designing web-pages years ago. It was all the rage to put browser buttons like this at the bottom.
Network Operations
Internet Service provider topics, Network operations, and other topics. Some topics include Mikrotik, Cisco, Arista and other configurations.
Preseem now supports IPv6
https://docs.preseem.com/changes Features IPv6 Preseem now supports IPv6 for all use cases. This includes the ability to assign subscribers a prefix of arbitrary length. IPv4 with Prefixes of Arbitrary Length Previously Preseem modelled subnet assignments to customers as a number of /32 assignments. For example a subscriber who was assigned a /30 would result in four … Read more
FD-IX: Local-pref and default routes
I just finished up an article over on the FD-IX blog about local-prefs, default routes, and Internet exchanges. https://www.fd-ix.com/uncategorized/local-pref-and-default-routes/ Not everyone on the Internet needs full feeds from their provider. In this case, how does learning routes from an Internet Exchange such as FD-IX benefit you if all you are doing is default routes? So … Read more
Hurricane Electric Route Filtering Algorithm
The following is from http://routing.he.net/algorithm.html . This outlines the criteria HE.NET uses for filtering routes from peers and customers. This is the route filtering algorithm for customers and peers that have explicit filtering: 1. Attempt to find an as-set to use for this network.1.1 Inspect the aut-num for this ASN to see if we can … Read more
Cisco Syslog severity levels
For those of you implementing Syslog triggers and such the following list will be helpful in filtering and classifying Syslog entries. 0 – Emergency 1 – Alert 2 – Critical 3 – Error 4 – Warning 5 – Notice 6 – Informational 7 – Debug
Preseem and Switches in switch centric design
Anyone who follows me knows I am a big fan of switch centric designs. This usually involves a router on a stick paired with a high port count switch. Recently I had a client that installed a Preseem appliance in their network. Equipment used in this setup-Dell R710 with a 4 Port SFP+ card running … Read more
Wireless ISP Network IP Scheme
For those of you starting out in the WISP field here is a good overview of a scalable Ip scheme for your WISP network. There are some caveats to this, which we will discuss later. This does not address IPV6, I have done some articles on IPv6 in the past that addresses IPV6. Some benefits … Read more
Cisco High Availability design
This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this content, you must be a member of Justin’s Patreon Unlock with PatreonAlready a qualifying Patreon … Read more
Photo Sunday
Follow me on Instagram for technology, and sometimes not technology, related photos. @j2sw
Medium WISP Core Network Design
This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this content, you must be a member of Justin’s Patreon Unlock with PatreonAlready a qualifying Patreon … Read more