FHRPs Flashcards
What is FHRP protocols used for
To increase network resilience by having more than one gateway for hosts on a LAN
What are the most common FHRPs and which protocols are Ciscos
HSRP - Cisco
VRRP - industry standard
GLBP - Cisco
For HSRP how many routers are required for functionality and what are the HSRP roles
2
HSRP acitve
HSRP standby
Does HSRP support premption
NO
How does HSRP identify other HSRP devices
HSRPv1 - using the all routers 224.0.0.2
HSRPv2 - using the all HSRPv2 routers address 224.0.0.102
How many HSRP groups does HSRP support
v1 - 255
v2 - 4095
What parameters can be configured for HSRP
router priority (for active/standby selection)
Timers
authentication
What command is used to configure HSRP
standby instance-id ip virtual-ip
What is the difference between VRRP and HSRP
Premption is enabled by default
uses address 224.0.0.18 for discovering VRRP routers
What is the difference between VRRPv2 & VRRPv3
v2 is for IPv4
v3 is for both IPv4 & IPv6
TO enable VRRPv3 what command is used
fhrp version vrrp v3
Instead of active/standby VRRP uses master/standby
True or False
True
What is the main benefit of GLBP
it is FHRP that allows load balancing between multiple gateways
Instead of active/standby GLBP uses master/standby
True or False
False - GLBP uses active/standby
What are the 2 roles for routers in the GLBP
AVG - active virtual gateway (responsible for responding to the intial ARP request and providing the VIP)
AVF - Active virtual forwarder (routes traffic from hosts) all routers in the GLBP group are AVF
