Which router redundancy protocol cannot be configured for interface tracking?
A.
GLBP
B.
HSRP
C.
RPR
D.
VRRP
E.
SLB
F.
RPR+
Explanation:
The Virtual Router Redundancy Protocol (VRRP) is a standards-based alternative to HSRP, defined in IETF standard RFC 2338. VRRP is so similar to HSRP that you need to learn only slightly different terminology and a couple of slight functional differences.
1. VRRP provides one redundant gateway address from a group of routers. The active router is called the master router, while all others are in the backup state. The master router is the one with the highest router priority in the VRRP group.
2. VRRP group numbers range from 0 to 255; router priorities range from 1 to 254 (254 is the highest; 100 is the default).
3. The virtual router MAC address is of the form 0000.5e00.01xx, where xx is a two-digit hex VRRP group number.
4. VRRP advertisements are sent at 1-second intervals. Backup routers can optionally learn the advertisement interval from the master router.
5. By default, all VRRP routers are configured to preempt the current master router, if their priorities are greater.
6. VRRP has no mechanism for tracking interfaces to allow more capable routers to take over the master role.
VRRP object tracking allows the tracking of a) an interface b) ip routing on an interface and c) route availability. While it’s true that this is technically ‘object’ tracking, isn’t the fundamental ability to decrement the priority based on interface status what is really being asked?
I believe you’re right. According to this page (http://www.cisco.com/en/US/docs/ios/12_3t/12_3t2/feature/guide/gtvrrptk.html):
” The VRRP Object Tracking feature extends the capabilities of the Virtual Router Redundancy Protocol (VRRP) to allow tracking of specific objects within the router that can alter the priority level of a virtual router for a VRRP group. For example, a WAN interface can be tracked and if it goes down, then the priority of the VRRP group can be lowered, which may allow another VRRP router to become the new group master virtual router. “