Difference between revisions of "Routing protocols"
From Teknologisk videncenter
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|Default 120 seconds on non-broadcast multi-access (NBMA) segments (Frame Relay, X.25, ATM) | |Default 120 seconds on non-broadcast multi-access (NBMA) segments (Frame Relay, X.25, ATM) | ||
|- | |- | ||
| − | |rowspan=4|Packet types|| colspan=2| Hello | Discovers neighbors and builds adjacencies with them | + | |rowspan=4|Packet types|| colspan=2| Hello || Discovers neighbors and builds adjacencies with them |
|- | |- | ||
|colspan=2|LSR || Link State Request - Request information about specific link state information | |colspan=2|LSR || Link State Request - Request information about specific link state information | ||
Revision as of 10:00, 25 April 2013
| Parameter | OSPF | EIGRP |
|---|---|---|
| Type | Link State | Distance vector |
| Metric | Bandwidth | Bandwidth + delay |
OSPF highlights
| Term | Explanation | ||
|---|---|---|---|
| Router-ID | Priority 1: Set with the router-id command | ||
| Priority 2: Highest loopback IP address | |||
| Priority 3: Highest active interface IP address | |||
| DR Designated Router | Priority 1: Highest priority. Set with the ip ospf priority command on the interface | ||
| Priority 2: Higest Router-ID | |||
| BDR Backup Designated Router | Priority 1: Next highest priority. Set with the ip ospf priority command on the interface | ||
| Priority 2: Next higest Router-ID | |||
| Communication | Uses multicast addresses 224.0.0.5 and 224.0.0.6 | ||
| 224.0.0.5 - Multicast to neighbors | |||
| 224.0.0.6 - Multicast to DR and BDR. DR will relay the information to DROthers on 224.0.0.5 | |||
| Metric | Uses bandwidth called cost - Default calculated as 108 / bandwidth | ||
| Metric is the accumulated cost to the destination network | |||
| default highest bandwidth is 108 = 100 Mbps. Change with the auto-cost reference-bandwidth command. Remember to change on all routers. | |||
| Serial interfaces - Remember to set the bandwidth command on serial interfaces to reflect the actual clock rate. (1,544 Mbps or 128 Kbps default) | |||
| Neighbour establisment | Neighbors are established if hello- and dead-time interval are the same and network type are the same | ||
| hello interval | default 10 seconds on point-to-point and multi-access networks | ||
| Default 30 seconds on non-broadcast multi-access (NBMA) segments (Frame Relay, X.25, ATM) | |||
| Dead-time interval | default 40 seconds on point-to-point and multi-access networks | ||
| Default 120 seconds on non-broadcast multi-access (NBMA) segments (Frame Relay, X.25, ATM) | |||
| Packet types | Hello | Discovers neighbors and builds adjacencies with them | |
| LSR | Link State Request - Request information about specific link state information | ||
| LSU | Link State Update - Send information about specifically requested link states | ||
| LSAck | Links State Acknogledgement | ||