帧中继中point-to-point与multipoint区别在哪
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解决时间 2021-01-11 22:27
- 提问者网友:战魂
- 2021-01-11 16:59
帧中继中point-to-point与multipoint区别在哪
最佳答案
- 二级知识专家网友:你可爱的野爹
- 2021-01-11 18:35
帧中继的点对点子接口(point-to-point)和多点子接口(multipoint)的区别:
一、点到点子接口:
R1(config-subif)#int s1/1.3 point-to-point
R1(config-subif)#ip address 172.16.1.1 255.255.255.0
R1(config-subif)#frame-relay map ip 172.16.1.2 100 broadcast
Only frame-relay interface-dlci command should beused on point-to-point interfaces not frame-relay map
R1(config-subif)#frame-relay ?
class Define a map class on the interface
de-group Associate a DE group with a DLCI
interface-dlci Define a DLCI on an inerface/subinterface
inverse-arp Enable/disable FR inverse ARP
ip Frame Relay Internet Protocol config commands
map Map a protocol address to a DLCI address
payload-compression Use payload compression
priority-dlci-group Define a priority group of DLCIs
vc-bundle configure a frame-relay vc-bundle
二、物理接口:
R1(config)#Int s1/2
R1(config-if)#ip address 10.10.10.1 255.255.255.248
R1(config-if)#encapsulation frame-relay
R1(config-if)#frame-relay lmi-type ansi
R1(config-if)#no shut
R1(config-if)#frame-relay map ip 10.10.10.2 ?
<16-1007> DLCI
vc-bundle vc-bundle
R1(config-if)#frame-relay map ip 10.10.10.2 102 ?
broadcast Broadcasts should be forwarded to this address
cisco Use CISCO Encapsulation
compress Enable TCP/IP and RTP/IP header compression
ietf Use RFC1490/RFC2427 Encapsulation
nocompress Do not compress TCP/IP headers
payload-compression Use payload compression
rtp RTP header compression parameters
tcp TCP header compression parameters
R1(config-if)#frame-relay map ip 10.10.10.2 102 broadcast
R1(config-if)#frame-relay map ip 10.10.10.3 103 broadcast
三、点到多点子接口:
R1(config)#int s1/1.4 multipoint
R1(config-subif)#ip address 10.10.10.1 255.255.255.248
R1(config-subif)#frame-relay map ip 10.10.10.2 102 broadcast
R1(config-subif)#frame-relay map ip 10.10.10.3 103 broadcast
结论:
1、物理接口可以像点到多点子接口一样配置多个PVC,这样主口的IP地址和其他分支的可以在同一个子网里。
2、承诺信息速率CIR和额外信息率EIR是针对PVC而言的。
一、点到点子接口:
R1(config-subif)#int s1/1.3 point-to-point
R1(config-subif)#ip address 172.16.1.1 255.255.255.0
R1(config-subif)#frame-relay map ip 172.16.1.2 100 broadcast
Only frame-relay interface-dlci command should beused on point-to-point interfaces not frame-relay map
R1(config-subif)#frame-relay ?
class Define a map class on the interface
de-group Associate a DE group with a DLCI
interface-dlci Define a DLCI on an inerface/subinterface
inverse-arp Enable/disable FR inverse ARP
ip Frame Relay Internet Protocol config commands
map Map a protocol address to a DLCI address
payload-compression Use payload compression
priority-dlci-group Define a priority group of DLCIs
vc-bundle configure a frame-relay vc-bundle
二、物理接口:
R1(config)#Int s1/2
R1(config-if)#ip address 10.10.10.1 255.255.255.248
R1(config-if)#encapsulation frame-relay
R1(config-if)#frame-relay lmi-type ansi
R1(config-if)#no shut
R1(config-if)#frame-relay map ip 10.10.10.2 ?
<16-1007> DLCI
vc-bundle vc-bundle
R1(config-if)#frame-relay map ip 10.10.10.2 102 ?
broadcast Broadcasts should be forwarded to this address
cisco Use CISCO Encapsulation
compress Enable TCP/IP and RTP/IP header compression
ietf Use RFC1490/RFC2427 Encapsulation
nocompress Do not compress TCP/IP headers
payload-compression Use payload compression
rtp RTP header compression parameters
tcp TCP header compression parameters
R1(config-if)#frame-relay map ip 10.10.10.2 102 broadcast
R1(config-if)#frame-relay map ip 10.10.10.3 103 broadcast
三、点到多点子接口:
R1(config)#int s1/1.4 multipoint
R1(config-subif)#ip address 10.10.10.1 255.255.255.248
R1(config-subif)#frame-relay map ip 10.10.10.2 102 broadcast
R1(config-subif)#frame-relay map ip 10.10.10.3 103 broadcast
结论:
1、物理接口可以像点到多点子接口一样配置多个PVC,这样主口的IP地址和其他分支的可以在同一个子网里。
2、承诺信息速率CIR和额外信息率EIR是针对PVC而言的。
全部回答
- 1楼网友:像个废品
- 2021-01-11 19:32
楼上正解。。。补充一点就是在OSPF里面。一般会选择使用BMA和P2M这两种方式。因为他们都支持broadcast,同时也是都可以在一个网段。P2P要分出很多网段这样比较浪费。在BMA和P2M中,最大的区别在于spoke之间学习网段的时候下一跳是不是hub。P2M会自动指向HUB,BMA则不会。别看这个小小的区别。在不指向HUB的情况下,如果spoke之间没有DLCI的互指的话,就不能联通。也就是说,frame-relay必须要是full-mesh。所以行业中用的多的还是P2M
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