Home » Cisco » 350-080 » Which of the following is a feature of Fabric Extender?
Which of the following is a feature of Fabric Extender?
A. The Fabric Extender provides two user queues for its QoS support, one for all no-drop classes and one for all drop classes.
B. The class-all-flood and class-ip-multicast class maps are used on the Fabric Extender.
C. The Fabric Extender inherits the CoS configured on the upstream switch.
D. For a Cisco Nexus 2248PQ 10GE Fabric Extender, all fabric interfaces can be bundled into a single fabric port channel.
Correct Answer: A
Explanation/Reference:
Explanation:
The problem is that the remote routers are announcing themselves with PIM Hello messages from their own IP addresses and my router registers these addresses as PIM neighbours.
The gateway in the routing table however contains the HSRP virtual address. When the router wants to join the multicast group, it looks for the route to the Rendezvous Point which has the HSRP virtual address as the next hop. Because this next-hop HSRP address is not one of the known PIM neighbours, the PIM-SM RFC specifies no Join should be sent.
Changing the static route to use an actual IP address of one of the HSRP routers makes the multicast work, but of course this makes the HSRP useless.
I have not tested VRRP because the other side did not want to change the network. VRRP would probably not have this problem since it does not use a virtual router IP, but uses the real IP address of the master router.
