HSRP (Hot Standby Router Protocol)
HSRP (Hot Standby Router Protocol) adalah Cisco-proprietary redundancy protocol untuk membangun toleransi kesalahan pada default gateway. HSRP menerapkan mekanisme failover transparent pada end device di dalam jaringan. Dalam hal ini user yang berada pada layer access(L2) tidak akan tergangu apabila primary default gateway mengalami gangguan dalam hal akses.
KONFIG
R1
R1(config)#interface FastEthernet0/0
R1(config-if)#ip address 13.13.13.1 255.255.255.0
R1(config-if)#no shutdown
R1(config-if)#interface FastEthernet0/1
R1(config-if)#no shutdown
R1(config-if)#ip address 192.168.12.1 255.255.255.0
MODUL CCNP ENTERPRISE | SMK IDN BOARDING SCHOOL 385
R1(config-if)#standby 1 ip 192.168.12.254
R1(config-if)#standby 1 preempt
R1(config-if)#standby 1 authentication md5 key-string cisco
R1(config-if)#router eigrp 1
R1(config-router)#net 0.0.0.0
R1(config-router)#no auto-summary
R2
R2(config)#interface FastEthernet0/0
R2(config-if)#ip address 23.23.23.2
255.255.255.0 R2(config-if)#no shutdown
!
R2(config-if)#interface FastEthernet0/1
R2(config-if)#ip address 192.168.12.2 255.255.255.0
R2(config-if)#standby 1 ip 192.168.12.254
R2(config-if)#standby 1 preempt
R2(config-if)#standby 1 authentication md5 key-string cisco
R2(config-if)#no shutdown
!
R2(config-if)#router eigrp 1
R2(config-router)#net 0.0.0.0
R2(config-router)#no auto-summary
R3
R3(config)#interface f0/0
R3(config-if)#ip address 13.13.13.3 255.255.255.0
R3(config-if)#no shutdown
!
R3(config-if)#interface f0/1
R3(config-if)#ip address 23.23.23.3 255.255.255.0
R3(config-if)#no shutdown
!
R3(config-if)#interface Loopback 0
R3(config-if)#ip address 8.8.8.8 255.255.255.255
!
R3(config-if)#router eigrp 1
R3(config-router)#net 0.0.0.0
R3(config-router)#no auto-summary
Konfig di PC
PC1 dan PC2
PC1> ip 192.168.12.10/24 192.168.12.254
PC2> ip 192.168.12.11/24 192.168.12.254
Verifikasi
R1 dan R2
R1#show standby brief
P indicates configured to preempt.
|
Interface Grp Pri P State Active Standby Virtual IP Fa0/1 1
100 P Standby192.168.12.2 local 192.168.12.254
R2(config-if)#do sh standby brief
P indicates configured to preempt.
|
Interface Grp Pri P State Active Standby Virtual IP Fa0/1 1 110
P Active local 192.168.12.1 192.168.12.254
Ping 8.8.8.8 -t pada PC, dan Shutdown int fa0/1
R2
R2(config)#int f0/1
R2(config-if)#shutdown
R2(config-if)#exit
PC-1
PC2> ping 8.8.8.8
84 bytes from 8.8.8.8 icmp_seq=2 ttl=254 time=13.678 ms
84 bytes from 8.8.8.8 icmp_seq=3 ttl=254 time=12.628 ms 8.8.8.8
icmp_seq=1 timeout
8.8.8.8 icmp_seq=22 timeout
84 bytes from 8.8.8.8 icmp_seq=7 ttl=254 time=30.278 ms
84 bytes from 8.8.8.8 icmp_seq=8 ttl=254 time=23.097 ms 84 bytes from
8.8.8.8 icmp_seq=9 ttl=254 time=23.630 ms
ada beberapa RTO dikarenakan proses pindah jalur
dari R2 ke R1.
SELESAI
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