Difference between revisions of "Routing protocols"
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| Priority 2: Next higest Router-ID | | Priority 2: Next higest Router-ID | ||
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| − | | rowspan=3|Metric || Uses bandwidth called cost - Default calculated as 10<sup>8</sup> / bandwidth | + | | rowspan=3|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 | ||
| + | |- | ||
| + | | rowspan=4|Metric || Uses bandwidth called cost - Default calculated as 10<sup>8</sup> / bandwidth | ||
|- | |- | ||
| Metric is the accumulated cost to the destination network | | Metric is the accumulated cost to the destination network | ||
|- | |- | ||
|default highest bandwidth is 10<sup>8</sup> = 100 Mbps. Change with the '''auto-cost reference-bandwidth''' command. Remember to change on all routers. | |default highest bandwidth is 10<sup>8</sup> = 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 | ||
| + | |- | ||
| + | |rowspan=2|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) | ||
| + | |- | ||
| + | |rowspan=2|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) | ||
| + | |- | ||
| + | |rowspan=4|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 | ||
|- | |- | ||
|} | |} | ||
| + | [[Category:Routing]] | ||
Latest revision as of 10:03, 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 |