最早不使用passive-interface 的 r1 show run

r1#show run
Building configuration...

Current configuration : 971 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r1
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$77i9$FcYUjXWx7jM2/Boj6DVJg/
!
no aaa new-model
ip subnet-zero
!
!
no ip domain lookup
ip host r2 172.16.1.2
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 description link to r2 f 0/0
 ip address 172.16.1.1 255.255.255.0
 duplex half
!
interface Ethernet1/0
 description link to sw
 ip address 172.16.2.1 255.255.255.0
 duplex half
!
interface Ethernet1/1
 description link to sw
 ip address 192.168.3.1 255.255.255.0
 duplex half
!
interface Ethernet1/2
 no ip address
 shutdown
 duplex half
!
interface Ethernet1/3
 no ip address
 shutdown
 duplex half
!
router rip
 network 172.16.0.0 // 因为 rip 宣告的是主网段.所以连接交换的端口也被加入到rip 宣告中去了.这样就使的在一个没有路由信息的线路上定期的发送路由信息.浪费带宽也不安全.
ip classless
no ip http server
!
!
!
!
!
!
!
!
!
gatekeeper
 shutdown
!
banner motd ^CWelcome to r1^C
!
line con 0
 stopbits 1
line aux 0
line vty 0 4
 no login
!
!
end

r1#

r1#
*Jan 24 13:01:16.995: RIP: sending v1 update to 255.255.255.255 via Ethernet1/0 (172.16.2.1)
*Jan 24 13:01:16.995: RIP: build update entries
*Jan 24 13:01:16.999:  subnet 172.16.1.0 metric 1
*Jan 24 13:01:16.999:  subnet 172.16.4.0 metric 2
*Jan 24 13:01:16.999:  subnet 172.16.5.0 metric 2
*Jan 24 13:01:19.251: RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (172.16.1.1)
*Jan 24 13:01:19.251: RIP: build update entries
*Jan 24 13:01:19.255:  subnet 172.16.2.0 metric 1
*Jan 24 13:01:22.079: RIP: received v1 update from 172.16.1.2 on FastEthernet0/0
*Jan 24 13:01:22.083:      172.16.4.0 in 1 hops
*Jan 24 13:01:22.083:      172.16.5.0 in 1 hops
*Jan 24 13:01:43.447: RIP: sending v1 update to 255.255.255.255 via Ethernet1/0 (172.16.2.1)
*Jan 24 13:01:43.447: RIP: build update entries
*Jan 24 13:01:43.451:  subnet 172.16.1.0 metric 1
*Jan 24 13:01:43.451:  subnet 172.16.4.0 metric 2
*Jan 24 13:01:43.451:  subnet 172.16.5.0 metric 2
*Jan 24 13:01:44.303: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on Ethernet1/0 (not full duplex), with Router FastEthernet0/0 (full duplex).
*Jan 24 13:01:45.815: RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (172.16.1.1)
*Jan 24 13:01:45.815: RIP: build update entries
*Jan 24 13:01:45.819:  subnet 172.16.2.0 metric 1

debug rip 可以看出正在向 e 1/0 这个末梢网络发送路由信息

r1#show run
Building configuration...

Current configuration : 1033 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r1
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$77i9$FcYUjXWx7jM2/Boj6DVJg/
!
no aaa new-model
ip subnet-zero
!
!
no ip domain lookup
ip host r2 172.16.1.2
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 description link to r2 f 0/0
 ip address 172.16.1.1 255.255.255.0
 duplex half
!
interface Ethernet1/0
 description link to sw
 ip address 172.16.2.1 255.255.255.0
 duplex half
!
interface Ethernet1/1
 description link to sw
 ip address 192.168.3.1 255.255.255.0
 duplex half
!
interface Ethernet1/2
 no ip address
 shutdown
 duplex half
!
interface Ethernet1/3
 no ip address
 shutdown
 duplex half
!
router rip
 passive-interface Ethernet1/0   //关闭这两个端口的路由信息发送
 passive-interface Ethernet1/1
 network 172.16.0.0
!
ip classless
no ip http server
!
!
!
!
!
!
!
!
!
gatekeeper
 shutdown
!
banner motd ^CWelcome to r1^C
!
line con 0
 stopbits 1
line aux 0
line vty 0 4
 no login
!
!
end

再 debug rip

*Jan 24 13:03:47.351: RIP: received v1 update from 172.16.1.2 on FastEthernet0/0
*Jan 24 13:03:47.355:      172.16.4.0 in 1 hops
*Jan 24 13:03:47.355:      172.16.5.0 in 1 hops
*Jan 24 13:04:05.379: RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (172.16.1.1)
*Jan 24 13:04:05.379: RIP: build update entries
*Jan 24 13:04:05.383:  subnet 172.16.2.0 metric 1
*Jan 24 13:04:12.863: RIP: received v1 update from 172.16.1.2 on FastEthernet0/0
*Jan 24 13:04:12.867:      172.16.4.0 in 1 hops
*Jan 24 13:04:12.867:      172.16.5.0 in 1 hops

这里debug 太短了.呵呵.不过效果是可以看出来的.30秒的广播中并没有包含 E 口.
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