Term
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Definition
| This default area type accepts link updates, route summaries, and external routes. |
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Term
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Definition
| labeled area 0, and all other areas connect to this area to exchange and route information. Has all the properties of a standard OSPF area. |
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Term
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Definition
| This area type does not accept information about routes external to the autonomous system, such as routes from non-OSPF sources. If routers need to route to networks outside the autonomous system, they use a default route, indicated as 0.0.0.0. |
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Term
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Definition
This Cisco proprietary area type does not accept external autonomous system routes or summary routes from other areas internal to the autonomous system. If a router needs to send a packet to a network external to the area, it sends the packet using a default route. Cannot contain ASBRs (except that the ABRs may also be ASBRs).
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Term
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Definition
| This area type defines a special LSA type 7. Offers benefits that are similar to those of a stub area. They do not accept information about routes external to the autonomous system, but instead use a default route for external networks. Allow ASBRs, which is against the rules in a stub area. |
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Term
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Definition
| allows ASBRs, but does not accept external routes or summary routes from other areas. A default route is used to get to networks outside of the area |
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Term
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Definition
LSA's allowed 1,2,3
LSA's blocked 4,5
No ASBR
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Term
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Definition
LSA's allowed 1,2,3(default route)
LSA's blocked 3,4,5
No ASBR |
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Term
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Definition
LSA's allowed 1,2,3,7
LSA's blocked 5
ASBR: yes |
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Term
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Definition
LSA's allowed 1,2,7
LSA's blocked 3,5
ASBR: yes |
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Term
| stub area routing table codes |
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Definition
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Term
| Totally stubby NSSA routing codes |
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Definition
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Term
| TOTALLY STUBBY ROUTING CODES |
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Definition
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Term
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Definition
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Term
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Definition
| displays ospf process ID, router ID, advertised networks, AD, maximum paths, number of areas in the router and the reference bandwith |
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Term
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Definition
| displays ospf neighbor relationships. shows neighbor ID, priority, state, dead timer, interface ip address of neighbor router and the interface used to reach the neighbor |
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Term
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Definition
| displays ospf process ID, router ID, ospf area information and the last time the SPF algorithm was calculated |
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Term
| show ip ospf interface ethernet f0/0 |
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Definition
| displays router ID, network type, DR/BDR information, Cost, hello/dead timers, adjacent neighbors, router state |
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Term
| router advertisement (RA) |
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Definition
| sent by an IPv6 router to the all IPv6 devices multicast. Includes link info such as prefix, prefix-length, and default-gateway |
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Term
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Definition
| sent by a device to the all IPv6 routers multicast to request a RA message from the router |
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Term
| neighbor solicitation (NS) |
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Definition
| sent by a device to the solicited node multicast address when it knows the IPv6 address of a device but not its MAC |
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Term
| neighbor advertisement (NA) |
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Definition
| sent by a device in response to a NS message |
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Term
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Definition
| a layer 2 encapsulation that supports various Layer 3 protocols including IPv4 and IPv6 |
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Term
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Definition
| verifies that each packet is unique and not duplicated |
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Term
| TCP Maximum Segment Size (MSS) |
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Definition
| defines the largest amount of data that the receiving device is able to accept in a single TCP segment |
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Term
| Path MTU Discovery (PMTUD) |
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Definition
| developed for the purpose of determining the lowest MTU along a path from the packet's source to destination |
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