Refer to the exhibit. An engineer is installing a new pair of routers in a redundant configuration. Which protocol ensures that traffic is not disrupted in the event of a hardware failure?
Yes, 00000c is the OUI code of cisco, the 00005e is the OUI code of ICANN, IANA Department, the VRRP is pubic protocol, so it use the OUI code of ICANN, IANA Department.
well you are part right mate, MAC 0c07 is for HSRP v1, but both routers are in active state which can only be achieved with GLBP, so the question is definitely wrong.
you can have 2 Active in HSRP, but you need to have ACL between them filtering HSRP multicasts. Anyway I would say GLBP should be the answer but according to MAC that's clear HSRPv1. In every angle this is pretty tricky question
The way the question is phrased I would think GLBP is the right answer. This question feels like it was written by an ASL individual as it isn't clear if they're asking what the current configuration IS or what the configuration SHOULD be based on the given requirement.
The engineer is installing hence the configuration and setup is still work in progress. This would mean it's possible for both routers to be active at the same time e.g., cabling not yet done.
The question is so bad.
The exhibit shows an HSRPv1 configuration, but the question is asking which protocol ensures traffic is not disrupted in the event of a hardware failure. The way its worded makes the exhibit IRRELEVANT!
To answer the question directly! GLBP is the only protocol that uses Active/Active FHRP
To answer the question based on the exhibit! the answer is HSRPv1.
The question is poor. The MAC address is for HSRP1. So none of the others are active. The question should read 'Which protocol 'is' ensuring that...' Without the MAC, I would think B
cisco(config-if)#do s runn int e0/0
Building configuration...
Current configuration : 98 bytes
!
interface Ethernet0/0
ip address 172.16.113.2 255.255.255.0
standby 10 ip 172.16.113.254
end
cisco(config-if)#do s stand
Ethernet0/0 - Group 10
State is Active
2 state changes, last state change 00:00:25
Virtual IP address is 172.16.113.254
Active virtual MAC address is 0000.0c07.ac0a
Local virtual MAC address is 0000.0c07.ac0a (v1 default)
Hello time 3 sec, hold time 10 sec
Next hello sent in 1.424 secs
Preemption disabled
Active router is local
Standby router is unknown
Priority 100 (default 100)
Group name is "hsrp-Et0/0-10" (default)
cisco(config-if)#
Ref: Hot Standby Router Protocol Features and Functionality – Cisco
“…
HSRP Addressing
…
HSRP uses the following MAC address on all media except Token Ring:
0000.0c07.ac** (where ** is the HSRP group number)
…”
A. HSRPv1
Correct answer.
B. GLBP
Wrong answer.
C. VRRP
Wrong answer.
D. HSRPv2
Wrong answer.
This is a trick question, the only one protocol in this question that allow continues traffic without interruption is GLBP because all routers are in the group are active and load balancing using round robin, other protocol in this question are using standby and active, there are small amount of packet lost while the standby is taking over the active role.
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