Here, we show the main difference between
HSRP, VRRP and GLBP in the following table, which may helpful for CCIE
learners.
|
HSRP
|
VRRP
|
|
|
- 1 active router.- 1 standby router.-
1 or more listening routers.
|
- 1 master router.- 1 or more backup
routers.
|
- 1 AVG (Active Virtual Gateway).- up to
4 AVF routers on the group (Active Virtual Forwarder) passing
traffic.- up to 1024 virtual routers (GLBP groups) per physical
interface.
|
|
- Use virtual ip address.
|
- Can use real router ip address, if
not, the one with highest priority become master.
|
- Use virtual ip address.
|
|
Cisco proprietary
|
IEEE standard
|
Cisco proprietary
|
|
Active Router:
|
Master Router: (*)
|
Active Virtual Gateway:
|
|
1-Highest Priority
|
1-Highest Priority
|
1-Highest Priority
|
|
2-Highest IP (tiebreaker)
|
2-Highest IP (tiebreaker)
|
2-Highest IP (tiebreaker)
|
|
yes
|
yes
|
yes
|
|
yes
|
yes
|
yes
|
|
yes
|
yes
|
yes
|
|
224.0.0.2 – udp 1985
(version1)
|
224.0.0.18 – IP 112
|
224.0.0.102 udp 3222
|
|
224.0.0.102-udp 1985 (version2)
|
||
|
Hello – 3 seconds
|
Advertisement – 1 second
|
Hello – 3 seconds
|
|
(Hold) 10 seconds
|
(Master Down Interval)3 * Advertisement
+ skew time
|
(Hold) 10 seconds
|
|
(Skew time)(256-priority) / 256
|
||
|
- Multiple HSRP group per
interface/SVI/routed int.
|
- Multiple VRRP group per
interface/SVI/routed int.
|
Load-balancing oriented-
Weighted algorithm.- Host-dependent algorithm.
|
|
- Round-Robin algorithm (default).
|
||
|
Requires appropriate distribution of
Virtual GW IP per Clients for optimal load-balancing.(generally
through DHCP)
|
Requires appropriate distribution
of Virtual GW IP per Clients for optimal
load-balancing.(generally through DHCP)
|
Clients are transparently updated
with virtual MAC according to load-balancing algorithm through
ARP requesting a unique virtual gateway.
|
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