CCNA Course Six

Routing Protocol Overview :

• Through a routing protocol, many routes to the same target network are learned, and metric is placed in the routing table. Metric, the same time, put in the routing table.
• Through a variety of routing protocols learned to go to the same destination network routing, routing protocol Management Distance routing protocol learning from the route into the routing table.

Distance vector routing protocol features: Cycle update, full update, broadcast update

Link state routing protocol features: Trigger update, incremental update, multicast update

Management Distance:

Connected interface	0
Static Route	1
Enhanced Interior Gateway Routing Protocol (EIGRP) Summary route	5
External Border Gateway Protocol (BGP)	20
Internal EIGRP	90
IGRP	100
Ospf	110
Intermediate system-to-intermediate System (is-is)	115
Routing Information Protocol (RIP)	120
Exterior Gateway Protocol (EGP)	140
On Demand Routing (ODR)	160
External EIGRP	170
Internal BGP	200
unknown*	255

RIP (Routing information Protocol)

	RIP v1	RIPv2
Routing protocol	There are classes	No class
VLSM	Not supported	Support
Whether the sending route entry carries a subnet mask	Whether	Is
Update address	255.255.255.255	224.0.0.9
Whether to support certification	Not supported	Support
Update protocol Port	UDP 520
Maximum hop count	15 (16 is not reached)

Configuration:

Router (config) #router RIP//Enter routing protocol RIP configuration mode

Router (Config-router) #version 2//change RIP version to second version

Router (config-router) #no auto-summary//Turn off Auto-summary function

Router (config-router) #network 192.168.1.0//Advertise the network into the RIP process

Router (config-router) #network 10.0.0.0

Router (config-router) #network 172.16.0.0

Router (Config-router) #end

If the network that contains the network address of the interface is included, the network address of the interface advertises into the RIP process and the update package is issued on that interface.

To advertise a routing entry rule:

Unlike the send port, which is not the same main class network, the summary is advertised as the primary class network. (No auto-summary can turn off sub-function)

With the send port on the same main class network, the same as the interface mask is advertised out, different will be discarded (V1 has this limit, V2 not)

ACL (Access Control List)

The standard acl:1-99 only matches the source IP address in the packet

The extended acl:100-199 can match the source IP address, destination IP address, source port number, destination port number, protocol in the packet

U ACL matching principle: top-down, first-match, end-implied rejection

CCNA Course Six