D-H,appy

===========================HSRP====================================
active  1
standby 1
224.0.0.2

show ip arp  (mac,ip address mapping table)
show standby brief
debug standby events

interface vlan 10
ip address 172.16.10.32 255.255.255.0
standby 1 priority 150   (default 100) (1 ~ 255)
standby 1 ip 172.16.10.110
standby 1 preempt  
standby 1 timers 5 15   (default hello 3sec hold 10 sec)
standby 1 track serial 0 50

standby 1 timers msec 200 msec 750
standby 1 preempt delay minimum 180

======multiple HSRP Group(on the same segment)===========
----sw1----
interface vlan 10
ip address 172.16.10.32 255.255.255.0
standby 1 priority 150
standby 1 ip 172.16.10.110
standby 2 priority 50
standby 2 ip 172.16.10.120

----sw2-----
interface vlan 10
ip address 172.16.10.33 255.255.255.0
standby 1 priority 50
standby 1 ip 172.16.10.110
standby 2 priority 150
standby 2 ip 172.16.10.120

=======multiple HSRP Group(different ip subnet)============

----sw1----
interface vlan 10
ip address 172.16.10.32 255.255.255.0
standby 1 priority 150
standby 1 ip 172.16.10.110

interface vlan 20
ip address 172.16.20.32 255.255.255.0
standby 1 priority 50
standby 1 ip 172.16.20.120

----sw2-----
interface vlan 10
ip address 172.16.10.33 255.255.255.0
standby 1 priority 50
standby 1 ip 172.16.10.110

interface vlan 20
ip address 172.16.20.33 255.255.255.0
standby 1 priority 150
standby 1 ip 172.16.20.120

===========================VRRP====================================
master
backup
224.0.0.18

interface vlan 10
ip address 172.16.10.32 255.255.255.0
vrrp 10 ip 10.1.10.1
vrrp 10 priority 150
vrrp 10 timers advertise 4 (default 1sec skew time)

=vrrp skew time=
(256-priority/256)

B의경우 (256-200)/256 = 0.2sec total 3.2
C의경우 (256-100)/256 = 0.6sec total 3.6

===========================GLBP====================================
AVG=active virtual gateway
AVF=active virtual forwarder
224.0.0.102

interface vlan 10
ip address 172.16.10.32 255.255.255.0
glbp 7 ip 10.1.7.1
glbp 7 priority 150  (default 100)
glbp 7 timers msec 250 msec 750 (default hello 3sec hold 10 sec)

P3R3#ping
Protocol [ip]:
Target IP address: 200.1.1.1
Repeat count [5]: 1000
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]:

P3R4#traceroute 200.1.1.1

show standby brie