Last Updated on August 7, 2021 by Admin 3
DRAG DROP
Drag each protocol on the left to the seed metric that is assigned by default when routes are redistributed from another routing protocol into that protocol.
Explanation:
A default seed metric with the value of infinity is assigned to routes that are redistributed into Enhanced Interior Gateway Routing Protocol (EIGRP) from another routing protocol. Routes with an infinite metric are ignored by EIGRP and are not entered into the routing table. Because EIGRP uses a complex metric based on bandwidth, delay, reliability, and load, the metric value used by the redistributing protocol cannot be automatically converted into a metric that EIGRP understands. Therefore, EIGRP requires that the metric be defined for all redistributed routes before those routes are entered into the routing table.
A default seed metric of infinity is also assigned to routes that are redistributed into Routing Information Protocol (RIP) from another routing protocol. Like EIGRP, RIP requires that the metric be defined for all redistributed routes before those routes are entered into the routing table. RIP uses hop count as a metric. Valid hop count values are from 1 through 15; a value of 16 is considered to be infinite. The hop count metric increases by 1 for each router along the path. Cisco recommends that you set a low value for the hop count metric for redistributed routes.
A default seed metric of 0 is assigned to routes that are redistributed into Intermediate SystemtoIntermediate System (ISIS) from another routing protocol. ISIS uses a cost metric assigned to each participating interface. ISIS prefers routes with the lowest cost. Routes redistributed into ISIS are designated as Level 2 routes unless otherwise specified.
A default seed metric of 1 is assigned to Border Gateway Protocol (BGP) routes that are redistributed into Open Shortest Path First (OSPF), and a default seed metric of 20 is assigned to routes that are redistributed into OSPF from another internal gateway protocol (IGP). By default, all routes redistributed into OSPF are designated as Type 2 external (E2) routes. E2 routes have a metric that remains constant throughout the routing domain. Alternatively, routes redistributed into OSPF can be designated as Type 1 external (E1) routes. With E1 routes, the internal cost of the route is added to the initial metric assigned during redistribution.
Routes that are redistributed into BGP are set to the same metric value that is used by the IGP. However, Cisco does not recommend redistributing IGP routes into BGP, because doing so can cause instability.
A default seed metric with the value of infinity is assigned to routes that are redistributed into Enhanced Interior Gateway Routing Protocol (EIGRP) from another routing protocol. Routes with an infinite metric are ignored by EIGRP and are not entered into the routing table. Because EIGRP uses a complex metric based on bandwidth, delay, reliability, and load, the metric value used by the redistributing protocol cannot be automatically converted into a metric that EIGRP understands. Therefore, EIGRP requires that the metric be defined for all redistributed routes before those routes are entered into the routing table.
A default seed metric of infinity is also assigned to routes that are redistributed into Routing Information Protocol (RIP) from another routing protocol. Like EIGRP, RIP requires that the metric be defined for all redistributed routes before those routes are entered into the routing table. RIP uses hop count as a metric. Valid hop count values are from 1 through 15; a value of 16 is considered to be infinite. The hop count metric increases by 1 for each router along the path. Cisco recommends that you set a low value for the hop count metric for redistributed routes.
A default seed metric of 0 is assigned to routes that are redistributed into Intermediate SystemtoIntermediate System (ISIS) from another routing protocol. ISIS uses a cost metric assigned to each participating interface. ISIS prefers routes with the lowest cost. Routes redistributed into ISIS are designated as Level 2 routes unless otherwise specified.
A default seed metric of 1 is assigned to Border Gateway Protocol (BGP) routes that are redistributed into Open Shortest Path First (OSPF), and a default seed metric of 20 is assigned to routes that are redistributed into OSPF from another internal gateway protocol (IGP). By default, all routes redistributed into OSPF are designated as Type 2 external (E2) routes. E2 routes have a metric that remains constant throughout the routing domain. Alternatively, routes redistributed into OSPF can be designated as Type 1 external (E1) routes. With E1 routes, the internal cost of the route is added to the initial metric assigned during redistribution.
Routes that are redistributed into BGP are set to the same metric value that is used by the IGP. However, Cisco does not recommend redistributing IGP routes into BGP, because doing so can cause instability.
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