Cisco Learning Note Ccnp-rip

RIP Routing Information Protocol

Version1 has class 16-hop broadcast update 255.255.255.0 periodic update 30s does not support MD5 distance vector Protocol UDP 520 management distance 120

Version2 non-class 16-Hop Multicast update 224.0.0.9 periodic update 30s support MD5 Distance Vector Protocol UDP 520 management distance 120

There are 2 conditions for direct Connect routing, and the interface is on with an IP address. Conditions for the formation of-------direct-attached routes

The routing table is called the convergence process.

RIp anti-ring mechanism: 1. Maximum hop count 16 Skip unreachable

2. Split horizontally: routes received from one interface can no longer be advertised from this interface

3. Trigger UPDATE: The router immediately sends update information when the routing table changes

4. Toxicity Reversal: (upgraded version with split level)

Manage distance ad:ad minimum put in routing table

Connect 0

Static 1

RIP 120

EIGRP 90

OSPF 110

RIP calculates metric to jump, passing a route for a hop, up to 15 hops, 16 hops unreachable

RIP timers:

Update Timer Cisco 25.5~30 other 25~30 avoid bursts

No update in invalid timer 180s is recorded as 16 hops

Refresh Timer 60s,16 Skip route 60s without update, delete

Offset List : acces-list 1 Permit 1.0.0.0

Router RIP

Offset-list 1 out/in fastethernet 0/0 (interface)

Distribution List

function----------Implement filter routing

Passive-interface if an interface is configured as a passive interface, the router can only accept routes and cannot send routes.

To turn off horizontal splitting:

Interface f0/0

No IP Split-horizon

RIP v1 and RIP v2 compatibility

Default Send ver 1 receive ver 1 2

Manual ver 2 send ver2 receive Ver2

Manual ver 1 Send ver 1 receive ver 1

Load balancing for RIP

Default support 4, maximum 16 bar

Router RIP

Maximum-paths

The principle of RIP V1 sending routes

1. Whether the routed entry and physical port on the same main class network are sent, not the same main class router sends the main network number of the route entry to the neighbor

2. The routing entry and physical port that are sent belong to the same main class network compare route entry and physical port mask are the same

Same Send to Peer

Different cancel send (except for 32-bit host routing)

RIP v1 principle of receiving routes

The router checks whether the received route entry is in the same main class as the local physical port

1. Not the same main class----------check the local routing table for the presence of the subnet route for the main class network

Subnet-----------------Drop routing updates with the main class network

No------------------added into the routing table

2. Under the same main class

The router uses the mask configured on the physical port that receives the route entry as a mask for the route entry (except for 32-bit host routes)

RIP V1 does not support disjoint subnets

1. Automatic summarization using RIP v2

2. Second Address

Maximum mask matching matching principle

1. First find the 32-bit host route

2. Finding routing entries that have been divided by subnets

3. Find the main class routing entry

4. Summary of main class routes-------Hyper-net

5. Find the default route

The principle of Clear certification:

1. Send the smallest key ID

2. Do not carry the key ID number

3. The key match in the receiver and all key chain, if successful, the authentication

MD5 Certification principles:

1. Sending the minimum key ID keys

2. The number that carries the key ID

3. The receiver first looks for the same key ID, if any, matches only once, determines whether it succeeds

If there is no key ID, only one hop down is found, and if it matches, the authentication succeeds; if it does not match, the authentication fails

RIP v2 Support Auto-summarization

Rip issued default route (5 kinds)

1. Method one. Default-information originate---------------recommended

2. Method Two-first write IP router 0.0.0.0 0.0.0.0 202.101.179.10 then redistribute static metric 1

3. Method three-first write IP router 0.0.0.0 0.0.0.0 F0/1 then, network 0.0.0.0

4. Method four-first write IP router 0.0.0.0 0.0.0.0 f0/1 then, IP summary-address RIP 0.0.0.0 0.0.0.0

5. Method five-first write IP default-network 13.0.0.0 (main class network segment of the outer network)

Trigger update (serial port):

Interface configuration: IP RIP triggered

Cisco Learning Note Ccnp-rip