NA-NP-IE系列实验32:帧中继上的RIP
实验32:帧中继上的RIP
1.
实验目的：
帧中继上运行路由协议
2.
实验拓扑
如图。
3.
实验步骤
配置如下：
r0(config)#int loo 1
r0(config-if)#ip add 1.1.
*Mar 1 00:03:29.827: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
r0(config-if)#ip add 1.1.1 .1 255.255.255.0
r0(config-if)#int s0/0
r0(config-if)#ip add 172.16.1.1 255.255.255.0
r0(config-if)#enc fra
r0(config-if)#no sh
r0(config-if)#exit
r0(config)#route
*Mar 1 00:03:55.571: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
r0(config)#router rip
r0(config-router)#v 2
% Ambiguous command: "v 2"
r0(config-router)#ve 2
r0(config-router)#n
*Mar 1 00:04:06.571: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r0(config-router)#net 1.1.1 .0
r0(config-router)#net 172.16.1.0
r0(config-router)#do ping 172.16.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/44/64 ms
r0(config-router)#do ping 3.3.3 .3 source 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3 .3, timeout is 2 seconds:
Packet sent with a source address of 1.1.1 .1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/44/80 ms
r0(config-router)#do ping 2.2.2 .2 source 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2 .2, timeout is 2 seconds:
Packet sent with a source address of 1.1.1 .1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/49/84 ms
r0(config-router)#do ping 3.3.3 .3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3 .3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/45/76 ms
r0(config-router)#do ping 2.2.2 .2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2 .2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/57/116 ms
r0(config-router)#do sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF , IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
1.0.0 .0/8 is variably subnetted, 2 subnets, 2 masks
C 1.1.1 .0/24 is directly connected, Loopback1
R 1.0.0 .0/8 [120/2] via 172.16.1.3, 00:00:04, Serial0/0
[120/2] via 172.16.1.2, 00:00:02, Serial0/0
R 2.0.0 .0/8 [120/1] via 172.16.1.2, 00:00:02, Serial0/0
R 3.0.0 .0/8 [120/1] via 172.16.1.3, 00:00:04, Serial0/0
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, Serial0/0
r0(config-router)#do sh ip int s0/0
Serial0/0 is up, line protocol is up
Internet address is 172.16.1.1/24
Broadcast address is 255.255.255.255
Address determined by setup command
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Multicast reserved groups joined: 224.0.0.9
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Local Proxy ARP is disabled
Security level is default
Split horizon is disabled
//
接口封装了帧中继后，水平分割被自动关闭
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
IP fast switching on the same interface is enabled
IP Flow switching is disabled
IP CEF switching is enabled
IP CEF Fast switching turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is disabled
IP route-cache flags are Fast, CEF
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Policy routing is disabled
Network address translation is disabled
BGP Policy Mapping is disabled
WCCP Redirect outbound is disabled
WCCP Redirect inbound is disabled
WCCP Redirect exclude is disabled
r1(config-line)#exit
r1(config)#int loo 1
r1(config-if)#ip add
*Mar 1 00:01:46.711: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
r1(config-if)#ip add 2.2.2 .2. 255.255.255.0]
^
% Invalid input detected at '^' marker.
r1(config-if)#ip add 2.2.2 .2 255.255.255.0
r1(config-if)#int s0/0
r1(config-if)#ip add 172.16.1.2 255.255.255.0
r1(config-if)#no sh
r1(config-if)#enc
*Mar 1 00:02:25.139: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
*Mar 1 00:02:26.139: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r1(config-if)#enc fra
r1(config-if)#
*Mar 1 00:03:09.595: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down
r1(config-if)#
*Mar 1 00:03:29.595: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r1(config-if)#exit
r1(config)#router rip
r1(config-router)#ve 2
r1(config-router)#net 2.2.2 .0
r1(config-router)#net 172.16.1.0
r1(config-router)#do ping 3.3.3 .3 source 2.2.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3 .3, timeout is 2 seconds:
Packet sent with a source address of 2.2.2 .2
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 60/84/108 ms
r1(config-router)#do ping 3.3.3 .3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3 .3, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
//
这里ping 命令没指明源地址，则认为ICMP 数据包的源IP 为172.16.1.2，目标为 3.3.3 .3。
R1
路由表查询路由表得知该数据包应该发送给172.16.1.1，而172.16.1.1 的帧中继
映射DLCI 为201；数据包到达R0，R0 路由表查询路由表得知该数据包应该发送给
172.16.1.3
，而172.16.1.3的帧中继映射DLCI 为102。R2 收到数据包，进行响应，
ICMP
数据包的源IP 为 4.4.4 .4，目标为172.16.1.2；R2 有172.16.1.0/24 的直连路
由，然而却没有172.16.1.2 的帧中继映射，因此无法进行封装。为了解决该问题，可以
在R2中增加映射：
r2(config-if)#frame-relay map ip 172.16.1.2 302.
r1(config-router)#do ping 3.3.3 .3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3 .3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 64/88/128 ms
r1(config-router)#exit
r1(config)#int s0/0
r1(config-if)#frme-relay map ip 172.16.1.3 201
^
% Invalid input detected at '^' marker.
r1(config-if)#frame-relay map ip 172.16.1.3 201
r1(config-if)#
r2(config-if)#int s0/0
r2(config-if)#ip add 172.16.1.3 255.255.255.0
r2(config-if)#enc fra
r2(config-if)#no sh
r2(config-if)#
*Mar 1 00:03:23.515: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
r2(config-if)#
*Mar 1 00:03:34.515: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r2(config-if)#exit
r2(config)#router rip
r2(config-router)#ve 2
r2(config-router)#net 3.3.3 .0
r2(config-router)#net 172.16.1.0
r2(config-router)#exit
r2(config)#int s0/0
r2(config-if)#frame-relay map ip 172.16.1.2 302
r2(config-if)#do ping 2.2.2 .2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2 .2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
r2(config-if)#do ping 2.2.2 .2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2 .2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 48/75/112 ms
r2(config-if)#
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