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среда, 9 ноября 2011 г.

Do you know that: redistribution and route types internal/external

Do you know how to make route internal or external during redistribution?

Look at the configuration example:

R1:

interface Loopback1
 ip address 10.20.30.40 255.255.255.255
!
interface FastEthernet1/0
 ip address 10.0.1.1 255.255.255.252
!
router eigrp 1
 network 10.0.1.1 0.0.0.0
 redistribute static metric 1000 10 10 10 1500


!
ip route 10.10.10.10 255.255.255.255 Loopback1

R1#sh ip route | b Gate
Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
C        10.0.1.0/30 is directly connected, FastEthernet1/0
L        10.0.1.1/32 is directly connected, FastEthernet1/0
D        10.0.3.0/30 [90/30720] via 10.0.1.2, 00:05:33, FastEthernet1/0
S        10.10.10.10/32 is directly connected, Loopback1
C        10.20.30.40/32 is directly connected, Loopback1


R1#sh ip eigrp topology 10.10.10.10/32
EIGRP-IPv4 Topology Entry for AS(1)/ID(10.0.1.1) for 10.10.10.10/32
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2562560
  Descriptor Blocks:
  0.0.0.0, from Rstatic, Send flag is 0x0
      Composite metric is (2562560/0), route is External
      Vector metric:
        Minimum bandwidth is 1000 Kbit
        Total delay is 100 microseconds
        Reliability is 10/255
        Load is 10/255
        Minimum MTU is 1500
        Hop count is 0
        Originating router is 10.0.1.1
      External data:
        AS number of route is 0
        External protocol is Static, external metric is 0
        Administrator tag is 1 (0x00000001)


As you can see here is redistributed static route is injected in eigrp topology as external. How to make it internal? It is simple: include redistributed subnet into network command under eigrp section.

R1(config)#router eigrp 1
R1(config-router)#network 0.0.0.0
R1(config-router)#do sh ip eigrp topology 10.10.10.10/32
EIGRP-IPv4 Topology Entry for AS(1)/ID(10.0.1.1) for 10.10.10.10/32
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2562560
  Descriptor Blocks:
  0.0.0.0, from Rstatic, Send flag is 0x0
      Composite metric is (2562560/0), route is Internal
      Vector metric:
        Minimum bandwidth is 1000 Kbit
        Total delay is 100 microseconds
        Reliability is 10/255
        Load is 10/255
        Minimum MTU is 1500
        Hop count is 0
        Originating router is 10.0.1.1
        Internal tag is 1

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