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Which two statements about VRRP advertisements are true? (Choose two.)
A. They are sent from the master router and standby routers.
B. They include VRRP timer information.
C. They are sent only from the master router.
D. They include priority information.
E. They are sent every three seconds by default.
Correct Answer: AD
Explanation/Reference:
https://yurmagccie.wordpress.com/2015/08/07/virtual-router-redundancy-protocol/#_jmp0_
F.they are sent from the master router and standby routers – I believe true
G.they include VRRP timer information – False because: All routers in a VRRP group must use the same timer values. The router in VRRP group will ignore VRRP advertisement messages with timer values that do not match to local timer values
H.they are sent only from the master router – False because: There are three possible states of VRRP router: Init, Backup, Master. When you enable VRRP on interface router goes from Init to Backup state. In Backup state Local router sends and listens to VRRP router: Init, Backup, Master. When you enable VRRP on interface router goes from Init to Backup state. In Backup state Local router sends and listens to VRRP Advertisement messages from other routers. If Local router receives VRRP Advertisement message with higher priority value or with same priority value but higher IP address, then Local router stays in Backup state. If there are no VRRP Advertisement messages with higher priority value or with same priority value and higher IP address, then Local router changes its state to Master.
I.they include priority information – is true because of the above
J.they are sent very three seconds by default – False because: Defaults: Hello time 1 sec, hold time 3.6 sec.
yes only master send adv
Reference: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_2/nx-os/unicast/configuration/ guide/l3_cli_nxos/l3_vrrp.pdf
I believe choice A is incorrect here. The answer should be CD
VRRP Advertisements
The virtual router master sends VRRP advertisements to other VRRP routers in the same group. The advertisements communicate the priority and state of the virtual router master. The VRRP advertisements are encapsulated in IP packets and sent to the IP Version 4 multicast address assigned to the VRRP group. The advertisements are sent every second by default; the interval is configurable.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp_fhrp/configuration/xe-3s/fhp-xe-3s-book/fhp-vrrp.html#GUID-F08F171E-D151-448B-B58C-D2ED17E11E9F