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CCNA 640-802 Bible – Configure,Verify and Troubleshoot EIGRP
Thursday, August 27th, 20091. Which statements are true about EIGRP successor routes? (Choose two.)
A:A successor route is used by EIGRP to forward traffic to a destination.
B:Successor routes are saved in the topology table to be used if the primary route fails.
C:Successor routes are flagged as "active" in the routing table.
D:A successor route may be backed up by a [...]
OSPF Convergence
Monday, August 24th, 2009Resiliency and redundancy to circuit failure is provided by the convergence capabilities of OSPF at layer 3.
There are two components to OSPF routing convergence: detection of topology changes and recalculation of routes.
Detection of topology changes is supported in two ways by OSPF. The first, and quickest, is a failure or change of status on the [...]
CCNA 640-802 Bible – Configure,Verify and Troubleshoot OSPF(2)
Friday, August 21st, 20091. Refer to the exhibit. Router1 was just successfully rebooted. Identify the current OSPF router ID for Router1.
A: 190.172.32.10
B: 208.149.23.162
C: 208.149.23.194
Tags: 640-802 Bible, OSPF
CCNA 640-802 Bible – Configure,Verify and Troubleshoot OSPF(1)
Friday, August 21st, 20091. The OSPF Hello protocol performs which of the following tasks? (Choose two.)
A:It provides dynamic neighbor discovery.
B:It detects unreachable neighbors in 90 second intervals.
C:It maintains neighbor relationships.
D:It negotiates correctness parameters between neighboring interfaces.
E:It uses timers to elect the router with the fastest links as the designated router.
F:It broadcasts hello packets throughout the internetwork to discover [...]
IGP – Default Route Summary
Monday, August 17th, 2009Default route RIP
static route 0.0.0.0 to null 0, and the “network 0.0.0.0” command under the RIP process,
static route 0.0.0.0 to null 0, and the “redistribute static” command under the RIP process,
“default-information originate” command (advertises a default route even if a default route does not exist in the routing table / does not [...]
IGP – Things to Remember
Thursday, August 6th, 20091. Routing occurs by finding the longest match in the routing table and by recursing to the outgoing interface.
2. We can debug the transiting traffic by enabling the process switching. But we don’t need to turn on process switching for the router’s locally originated traffic or for the traffic destined for the router.
3. "ip default-gateway" [...]
EIGRP – Things to Remember
Tuesday, August 4th, 20091. The IP header of an EIGRP packet specifies protocol number 88.
2. To establish neighbor relationship, the neighbors must be in the same IP subnet. While EIGRP supports secondary IP addresses and subnets, EIGRP sources its messages always from the address in the primary subnet, so the IP addresses of neighbors must be in the [...]
OSPF – Things to Remember
Monday, August 3rd, 20091. The IP header of an OSPF packet specifies protocol number 89.
2. To establish OSPF neighbor adjacency, hello/dead timers, MTU (otherwise have to use "ip ospf mtu-ignore") must match. Unique router-id is also required.
3. Routers in stub area can only be adjacent with the routers in stubs or totally stubby area. Routers in NSSA can [...]