Routing Protocols
Internal Protocols
RIP (v1)
- Max hop count of 15
- Routing table updates every 30 seconds, and the WHOLE TABLE
- No VLSM (CIDR)
- No authenticiation
RIP v2
- Yes VLSM
- Authentication added
IGRP (Cisco proprietary)
OSPF
- Noisy boot HELO packets
- then LSAs to converge
- Metric is COST not HOPS
- Authentication
- Prevents loops
- Detect and corrects link errors/failurs
- Converges immediately
- v3 supports IPv6
- Area 0 is the backbone (or only) layer, to divide routers into smaller areas for fast convergence and small routing tables
IS-IS
- Lin-state proto
- IPv6 Native from its creation
- ISP standard router
- Multi-pathing!!!!!
Exterior Protocols
EIGRP
- Distance-vector
BGP
- Ties ASs together