Some general information regarding the different routing protocols.
Administrative Distance Summary
Type
| |
| Connected | 0 |
| Static | 1 |
| BGP (external) | 20 |
| EIGRP (internal) | 90 |
| IGRP | 100 |
| OSPF | 110 |
| IS-IS | 115 |
| RIP | 120 |
| EIGRP (external) | 170 |
| BGP (internal) | 200 |
| Untrustable | 255 |
Multi-cast addresses used
RIP-2: 224.0.0.9
OSPF: 224.0.0.5, 224.0.0.6
EIGRP: 224.0.0.10
All except RIP-1 support manual summarization.
RIP and EIGRP support auto-summarization, OSPF does not.
Out of RIP, OSPF, EIGRP, and IS-IS, only EIGRP is Cisco proprietary.
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