实验10 使用VRRP虚地址建立GRE隧道

MSR使用VRRP虚地址建立GRE隧道配置功能需求1.

RTA和RTB采用VRRP做备份；2.

RTA、RTB使用VRRP虚地址与RTC起GRETunnel。3.

当RTA链路出现问题时，切换到备用RTB上，保持GREVPN不断，PC可以快速访问到备用服务器；组网信息及描述配置步骤RTA的配置#配置接口地址，并起VRRPinterfaceGigabitEthernet0/0

portlink-moderoute

vrrpvrid1priority110

vrrpvrid1preempt-modetimerdelay5#配置连接内网服务器接口地址interfaceGigabitEthernet0/1

portlink-moderoute

#配置GRE，此处注意，RTA和RTB上的配置参数需要一致，source地址需要配置为VRRP的虚地址。interfaceTunnel0

keepalive103#配置完，切记要添加一条静态路由，指向tunnel口。

iproute-staticTunnel0

RTB的配置

#配置接口地址，并起VRRPinterfaceGigabitEthernet0/0

portlink-moderoute

vrrpvrid1preempt-modetimerdelay5#配置连接内网服务器接口地址interfaceGigabitEthernet0/1

portlink-moderoute

#配置GRE，此处注意，RTA和RTB上的配置参数需要一致，source地址需要配置为VRRP的虚地址。interfaceTunnel0

keepalive103#

iproute-staticTunnel0#RTC的配置#配置出口地址interfaceGigabitEthernet0/0

portlink-moderoute

#配置内网地址，这里使用一个loopback地址进行模拟interfaceLoopBack5

#配置GREtunnelinterfaceTunnel0

keepalive103#添加一条静态路由，指向tunnel口

iproute-staticTunnel0配置完成之后，在RTA上观察VRRP[RTA]disvrrpver

IPv4StandbyInformation:

RunMode

:Standard

RunMethod

:VirtualMAC

Totalnumberofvirtualrouters:1

InterfaceGigabitEthernet0/0

VRID

:1

AdverTimer:1

AdminStatus

:Up

State

:Master

ConfigPri

:110

RunningPri:110

PreemptMode

:Yes

DelayTime

:5

AuthType

:None

VirtualIP

VirtualMAC

:0000-5e00-0101

MasterIP

在RTB上观察VRRP[RTB]disvrrpver

IPv4StandbyInformation:

RunMode

:Standard

RunMethod

:VirtualMAC

Totalnumberofvirtualrouters:1

InterfaceGigabitEthernet0/0

VRID

:1

AdverTimer:1

AdminStatus

:Up

State

:Backup

ConfigPri

:100

RunningPri:100

PreemptMode

:Yes

DelayTime

:5

BecomeMaster

:3100msleft

AuthType

:None

VirtualIP

MasterIP

可以看到，RTA为mater设备。

在RTA的观察tunnel0[RTA]disinterfaceTunnel0Tunnel0currentstate:UPLineprotocolcurrentstate:UPDescription:Tunnel0InterfaceTheMaximumTransmitUnitis1476EncapsulationisTUNNEL,service-loopback-groupIDnotset.Tunnelbandwidth64(kbps)Tunnelkeepaliveenabled,Period(10s),Retries(3)Tunnelprotocol/transportGRE/IP

GREkeydisabled

ChecksummingofGREpacketsdisabledOutputqueue:(Urgentqueuing:Size/Length/Discards)

0/100/0Outputqueue:(Protocolqueuing:Size/Length/Discards)

0/500/0Outputqueue:(FIFOqueuing:Size/Length/Discards)

0/75/0

Lastclearingofcounters:

Never

Last300secondsinput:

2bytes/sec,0packets/sec

Last300secondsoutput:

2bytes/sec,0packets/sec

404packetsinput,

4956bytes

0inputerror

233packetsoutput,

5700bytes0outputerror

在RTB上观察tunnel0[RTB]disinterfaceTunnel0Tunnel0currentstate:DOWNLineprotocolcurrentstate:DOWNDescription:Tunnel0InterfaceTheMaximumTransmitUnitis64000EncapsulationisTUNNEL,service-loopback-groupIDnotset.Tunnelbandwidth64(kbps)Tunnelkeepaliveenabled,Period(10s),Retries(3)Tunnelprotocol/transportGRE/IP

GREkeydisabled

ChecksummingofGREpacketsdisabledOutputqueue:(Urgentqueuing:Size/Length/Discards)

0/100/0Outputqueue:(Protocolqueuing:Size/Length/Discards)

0/500/0Outputqueue:(FIFOqueuing:Size/Length/Discards)

0/75/0

Lastclearingofcounters:

Never

Last300secondsinput:

0bytes/sec,0packets/sec

Last300secondsoutput:

0bytes/sec,0packets/sec

0packetsinput,

0bytes

0inputerror

0packetsoutput,

0bytes

0outputerror在RTC上观察tunnel0[RTC]disintTunnel0Tunnel0currentstate:UPLineprotocolcurrentstate:UPDescription:Tunnel0InterfaceTheMaximumTransmitUnitis1476EncapsulationisTUNNEL,service-loopback-groupIDnotset.Tunnelbandwidth64(kbps)Tunnelkeepaliveenabled,Period(10s),Retries(3)Tunnelprotocol/transportGRE/IP

GREkeydisabled

ChecksummingofGREpacketsdisabledOutputqueue:(Urgentqueuing:Size/Length/Discards)

0/100/0Outputqueue:(Protocolqueuing:Size/Length/Discards)

0/500/0Outputqueue:(FIFOqueuing:Size/Length/Discards)

0/75/0

Lastclearingofcounters:

Never

Last300secondsinput:

0bytes/sec,0packets/sec

Last300secondsoutput:

2bytes/sec,0packets/sec

221packetsinput,

324bytes

0inputerror

239packetsoutput,

5844bytes0outputerror

断开RTA的连线之后，可以看到VRRP已经切换到了RTB设备上。[RTB]disvrrpver

IPv4StandbyInformation:

RunMode

:Standard

RunMethod

:VirtualMAC

Totalnumberofvirtualrouters:1

InterfaceGigabitEthernet0/0

VRID

:1

AdverTimer:1

AdminStatus

:Up

State

:Master

ConfigPri

:100

RunningPri:100

P