Redistribute Parameters

Card Set Information

Author:
weisunc
ID:
147442
Filename:
Redistribute Parameters
Updated:
2012-04-13 13:50:22
Tags:
EIGRP OSPF CCNP
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Description:
Redistribution Parameters for OSPF, EIGRP
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  1. metric
    A keyword after which follows the four metric components (bandwidth, delay, reliability, link load), plus the MTU associated with the route. [EIGRP]
  2. match
    If redistributing from OSPF, this keyword lets you match internal OSPF routes, external (by type), and NSSA external routes, essentially filtering which routes are redistributed. [EIGRP]
  3. tag
    Assigns a unitless integer value to the routes redistributed by this command—tags which can be later matched by other routers using a route-map [EIGRP, OSPF]
  4. route-map
    Apply the logic in the referenced route-map to filter routes, set metrics, and set route tags. [EIGRP, OSPF]
  5. metric
    Defines the cost metric assigned to routes redistributed by this command, unless overridden by a referenced route map. [OSPF]
  6. metric-type
    Defines the external metric type for the routes redistributed by this command: 1 (E1 routes) or 2 (E2 routes). [OSPF]
  7. match
    If redistributing from another OSPF process, this keyword lets you match internal OSPF routes, external (by type), and NSSA external routes, essentially filtering which routes are redistributed. [OSPF]
  8. subnets
    Redistribute subnets of classful networks. Without this parameter, only routes for classful networks are redistributed. [OSPF-unique]
  9. process-id, as-number
    If redistributing a routing protocol that uses a process-id or ASN on the router global config command, use this parameter to refer to that process or ASN value.
  10. protocol
    The source of routing information. Includes RIP, OSPF, EIGRP, IS-IS, BGP, connected, and static.
  11. OSPF Redistribution with Minimal Parameters
    • When taking from BGP, use a default metric of 1.
    • When taking from another OSPF process, take the source route’s metric.
    • When taking from all other sources, use a default metric of 20.
    • Create a Type 5 LSA for each redistributed route (external) if not inside an NSSA area; create a Type 7 LSA if inside an NSSA area.
    • Use external metric type 2.
    • Redistribute only routes of classful (class A, B, and C) networks, and not routes for subnets.
  12. Default if no metric configuration exists
    • Cost 1 for routes learned from BGP.
    • If redistributed from another OSPF process, use the source route’s OSPF cost.
    • Cost 20 for all other route sources.
  13. Setting the default for all redistribute commands
    The default-metric cost OSPF subcommand.
  14. Setting the metric for one route source
    The metric cost parameters on the redistribute command.
  15. Setting different metrics for routes learned from a single source
    Use the route-map parameter on the redistribute command.

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