HSRP:

1.启用HSRP功能，并设置虚拟地址IP, 1为standby的组号。

2.相同组号的路由器属于同一个HSRP组，所有属于同一个HSRP组的路由器的虚拟地址必须一致。

3.HSRP的优先级默认为100，该值越大抢占为活动路由器的优先权越高

4.可以设置路由器是否抢占为活动路由器

5.由于局域网内大多使用三层交换机，此时HSRP是在交换机的SVI接口上配置的。

1.网关冗余热备份协议HSRP(CISCO私有)

2.VRRP

3.GLBP

enable

conf t

no ip do lo

enable pass cisco

line con 0

logg sync

exec-t 0 0

line vty 0 4

pass cisco

logg sync

exit

host

1.网关冗余热备份协议HSRP(CISCO私有)

-------------------------------------------------------------------------

R1:

int e0/0

ip add 10.1.1.1 255.255.255.0

no shut

exit

int e0/1

ip add 13.1.1.1 255.255.255.0

no shut

exit

router rip

version 2

no auto-summary

network 10.0.0.0

network 13.0.0.0

passive-int e0/0

exit

R2:

int e0/0

ip add 10.1.1.2 255.255.255.0

no shut

exit

int e0/1

ip add 23.1.1.2 255.255.255.0

no shut

exit

router rip

version 2

no auto-summary

network 10.0.0.0

network 23.0.0.0

passive-interface e0/0

exit

R3:

int l0

ip add 33.1.1.1 255.255.255.0

exit

int e0/1

ip add 13.1.1.3 255.255.255.0

no shut

exit

int e0/2

ip add 23.1.1.3 255.255.255.0

no shut

exit

router rip

version 2

no auto-summary

network 33.0.0.0

network 13.0.0.0

network 23.0.0.0

exit

R1:

int e0/0

standby 1 ip 10.1.1.254

standby 1 priority 120

standby 1 preempt

standby 1 authentication mode md5 key-string cisco

standby 2 ip 10.1.1.253

standby 2 preempt

standby 2 authentication mode md5 key-string cisco

exit

R2:

int e0/0

standby 1 ip 10.1.1.254

standby 1 preempt

standby 1 authentication mode md5 key-string cisco

standby 2 ip 10.1.1.253

standby 2 priority 120

standby 2 preempt

standby 2 authentication mode md5 key-string cisco

exit

R1/R2:

show standby brief

PC1:

no ip routing

int e0/0

ip add 10.1.1.100 255.255.255.0

no shut

exit

ip default-gateway 10.1.1.254

ping 33.1.1.1 repeat 10000

R3:

show standby brief

R1:

int e0/0

shutdown

exit

R3:

show standby brief

R1:

int e0/0

standby 1 track e0/1 30

exit

int e0/1

shutdown

exit

show standby brief

show standby

2.VRRP

--------------------------------------------------------------------------

R1:

default int e0/0

int e0/0

ip add 10.1.1.1 255.255.255.0

no shut

exit

router rip

network 10.0.0.0

passive-int e0/0

exit

R2:

default int e0/0

int e0/0

ip add 10.1.1.2 255.255.255.0

no shut

exit

router rip

network 10.0.0.0

passive-interface e0/0

exit

R1:

track 1 int e0/1 line-protocol

exit

int e0/0

vrrp 1 ip 10.1.1.254

vrrp 1 priority 120

vrrp 1 preempt

vrrp 1 authentication mode md5 key-string cisco

vrrp 2 ip 10.1.1.253

vrrp 2 preempt

vrrp 2 authentication mode md5 key-string cisco

vrrp 2 track 1 decrement 30

exit

R2:

track 1 int e0/1 line-protocol

exit

int e0/0

vrrp 1 ip 10.1.1.254

vrrp 1 priority 120

vrrp 1 preempt

vrrp 1 authentication mode md5 key-string cisco

vrrp 2 ip 10.1.1.253

vrrp 2 priority 120

vrrp 2 preempt

vrrp 2 authentication mode md5 key-string cisco

vrrp 2 track 1 decrement 30

exit

 

R1/R2:

show vrrp brief

3. GLBP

--------------------------------------------------------------------

R1:

int e0/0

ip add 10.1.1.1 255.255.255.0

no shut

exit

int e0/1

ip add 20.1.1.1 255.255.255.0

no shut

exit

router rip

version 2

no auto-summary

network 10.0.0.0

network 20.0.0.0

passive-interface e0/0

exit

R2:

int e0/0

ip add 10.1.1.2 255.255.255.0

no shut

exit

int e0/1

ip add 20.1.1.2 255.255.255.0

no shut

exit

router rip

version 2

no auto-summary

network 10.0.0.0

network 20.0.0.0

passive-interface e0/0

exit

R3:

int e0/0

ip add 10.1.1.3 255.255.255.0

no shut

exit

int e0/1

ip add 20.1.1.3 255.255.255.0

no shut

exit

router rip

version 2

no auto-summary

network 10.0.0.0

network 20.0.0.0

passive-interface e0/0

exit

R4:

int l0

ip add 44.1.1.1 255.255.255.0

exit

int e0/0

ip add 20.1.1.4 255.255.255.0

no shut

exit

router rip

version 2

no auto-summary

network 20.0.0.0

network 44.0.0.0

exit

-----------------------------------------------------

R1:

int e0/0

glbp 1 ip 10.1.1.254

glbp 1 priority 200

glbp 1 preempt

glbp 1 authentication text cisco

exit

R2:

int e0/0

glbp 1 ip 10.1.1.254

glbp 1 priority 180

glbp 1 preempt

glbp 1 authentication text cisco

exit

R3:

int e0/0

glbp 1 ip 10.1.1.254

glbp 1 priority 160

glbp 1 preempt

glbp 1 authentication text cisco

exit

R1:

show glbp

R7-PC1:

no ip routing

int e0/0

ip add 10.1.1.100 255.255.255.0

no shut

exit

ip default-gateway 10.1.1.254

ping 44.1.1.1

show arp

clear arp cache

ping 44.1.1.1

show arp

跟踪上行链路

------------------------------------------------------

R1:

track 2 int e0/1 line-protocol

int e0/0

glbp 1 wighting 110 lower 85 upper 105

glb1 1 weighting track 2 decrement 50