Home » Cisco » 200-105 » What is required for RouterA to exchange routing updates with RouterC?
Refer to the exhibit. When running EIGRP, what is required for RouterA to exchange routing updates with RouterC?
A. AS numbers must be changed to match on all the routers
B. Loopback interfaces must be configured so a DR is elected
C. The no auto-summary command is needed on Router A and Router C
D. Router B needs to have two network statements, one for each connected network
Answer: A
Explanation:
Here we required same autonomous system between router A,B,C.Routing updated always exchange between in same EIGRP EIGRP autonomous system.you can configure more than one EIGRP autonomous system on the same router. This is typically done at a redistribution point where two EIGRP autonomous systems are interconnected. Individual router interfaces should EIGRP autonomous systems are used with multiple points of mutual redistribution, it can cause multiple EIGRP autonomous systems on the same set of interfaces on the router. If multiple only be included within a single EIGRP autonomous system. Cisco does not recommend running discrepancies in the EIGRP topology table if correct filtering is not performed at the redistribution points. If possible, Cisco recommends you configure only one EIGRP autonomous system in any single autonomous system.
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f07.shtml
