Category: segment routing
Segment Routing Anyone?
One of my readers listened to a podcast where a $vendor described how they found another use case for source routing IPv6 segment routing (SR): 5G networks… and wondered whether SR made a comeback or is about to.
I don’t know nearly enough about mobile networks to have an opinion, however…
Synchronizing BGP and OSPF (or OSPF and LDP)
Rich sent me a question about temporary traffic blackholing in networks where every router is running IGP (OSPF or IS-IS) and iBGP.
He started with a very simple network diagram:
Zero Bandwidth Traffic Engineering
Oliver Steudler from Juniper sent me a link to an interesting Juniper blog post describing zero-bandwidth traffic engineering.
Read the blog post first and then come back for some opinionated rambling ;)
Is the problem real? Yes.
Segment Routing 101 on Software Gone Wild
With all the hype around Segment Routing we said: “let’s chat about it, what could possibly go wrong”. The result: Episode 33 of Software Gone Wild. We didn’t get very far into the technical details, but you might still find the overview useful (or not – do tell me how good or useless it is).
… updated on Saturday, December 26, 2020 08:49 UTC
LDP-IGP Synchronization in MPLS Networks
A reader of my blog planning to migrate his network from a traditional BGP-everywhere design to a BGP-over-MPLS one wondered about potential unexpected consequences. The MTU implications of introducing MPLS in a running network are usually well understood (even though you could get some very interesting behavior); if you can, increase the MTU size by at least 16 bytes (4 labels) and check whether MTU includes L2 header. Another somewhat more mysterious beast is the interaction between IGP and LDP that can cause traffic disruptions after the physical connectivity has been reestablished.