RIP (contd)
RIP supports both point-to-point & broadcast links, uses port 520 in UDP. Normal mode = broadcast packets => overhead of each station processing it.
Each RIP packet can contain upto 25 addresses. Usually a table can fit inside one packet
Tables advertised to neighbors every 30 s. Route reinitialized (as 16 or infinity) if no refresh for 180 s, and may be removed later
Inefficient packet format is due to origins from BSD socket code (“socket address” data structure)
Triggered updates: inform neighbors when table changes. Delay updates to avoid “update storms”