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eigrp static route redistribution

Paul Jin
Level 1
Level 1

topology

Div1 (DW1, DW2), Div2 (DW3, DW4), Div3 (DW5, DW6)

I configured EIGRP as the routing protocol between core and distribution switches. there are static routes configured in core switches. I redistributed static routes in EIGRP. 

In each distribution switch, I configured vlans and HSRP. 

When I show ip route in DW1, it does not show static routes redistributed from core-1. And in DW2, it does not show static routes redistributed from core-2. 

below is output from DW1:

show ip route 

Gateway of last resort is 10.111.207.85 to network 0.0.0.0

D*EX  0.0.0.0/0 [170/3072] via 10.111.207.85, 6w2d, GigabitEthernet1/1/2
      10.0.0.0/8 is variably subnetted, 36 subnets, 7 masks
D EX     10.0.0.0/8 [170/28416] via 10.111.207.85, 6w2d, GigabitEthernet1/1/2
C        10.111.200.0/24 is directly connected, Vlan200
L        10.111.200.2/32 is directly connected, Vlan200
C        10.111.201.0/24 is directly connected, Vlan210
L        10.111.201.2/32 is directly connected, Vlan210
D        10.111.202.0/24
           [90/3328] via 10.111.207.85, 6w2d, GigabitEthernet1/1/2
           [90/3328] via 10.111.207.81, 6w2d, GigabitEthernet1/1/1
D        10.111.203.0/24
           [90/3328] via 10.111.207.85, 6w2d, GigabitEthernet1/1/2
           [90/3328] via 10.111.207.81, 6w2d, GigabitEthernet1/1/1

.............................

sh ip eigrp topology 10.0.0.0/8
EIGRP-IPv4 Topology Entry for AS(100)/ID(192.168.50.2) for 10.0.0.0/8
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 28416
  Descriptor Blocks:
  10.111.207.85 (GigabitEthernet1/1/2), from 10.111.207.85, Send flag is 0x0
      Composite metric is (28416/28160), route is External
      Vector metric:
        Minimum bandwidth is 100000 Kbit
        Total delay is 110 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 1
      External data:
        Originating router is 192.168.50.3
        AS number of route is 0
        External protocol is Static, external metric is 0
        Administrator tag is 0 (0x00000000)

 

My question is why static routes redistributed from core switches are not all appeared in DW1 or DW2? In other distribution switches, all static routes are advertised, but Originating router either 192.168.50.2 or 192.168.50.3 which are the vlan interface ip address of DW1 and DW2. 

Please help me. 

 

24 Replies 24

Yes, I can see both core switches. 

DSW1
sh ip eigrp neighbors
EIGRP-IPv4 Neighbors for AS(100)
H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq
                                            (sec)         (ms)       Cnt Num
6   192.168.50.3            Vl50              10 4d18h      27   200  0  937
4   192.168.203.3           Vl1203            13 4d18h      27   200  0  938
3   10.111.206.3            Vl260             14 4d18h      37   222  0  936
1   10.111.201.3            Vl210             14 4d18h      33   200  0  939
0   10.111.200.3            Vl200             14 4d18h      29   200  0  940
5   10.111.207.81           Gi1/1/1           10 6w6d      577  3462  0  1234
2   10.111.207.85           Gi1/1/2           14 6w6d      302  1812  0  1136

DSW3
sh ip eigrp neighbors
EIGRP-IPv4 Neighbors for AS(100)
H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq
                                            (sec)         (ms)       Cnt Num
1   10.111.203.3            Vl230             14 14w2d       5   200  0  490
3   10.111.206.131          Vl261             13 15w6d       5   200  0  492
2   10.111.202.3            Vl220             11 15w6d      25   200  0  489
0   10.111.204.3            Vl240             14 15w6d       4   200  0  491
5   10.111.207.65           Gi1/1/1           13 16w5d      12   200  0  1232
4   10.111.207.69           Gi1/1/2           12 16w5d       1   200  0  1134

 

Paul

Paul

What else are the DS2 switches peering with ?

Just to clarify, you have configured the static routes on each core switch and are redistributing into static on both switches ?

Is you EIGRP configuration the same on both switches ?

Jon

DSW2 peering is also about the same as DSW1 as below. 

sh ip eigrp neighbors
EIGRP-IPv4 Neighbors for AS(100)
H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq
                                            (sec)         (ms)       Cnt Num
0   10.111.207.89           Gi1/1/1           13 5d14h      21   200  0  1236
6   192.168.50.2            Vl50              14 5d14h      17   200  0  1156
5   192.168.203.2           Vl1203            10 5d14h      17   200  0  1157
4   10.111.206.2            Vl260             11 5d14h      24   200  0  1155
3   10.111.207.93           Gi1/1/2           10 5d14h      13   200  0  1138
2   10.111.201.2            Vl210             14 5d14h      19   200  0  1158
1   10.111.200.2            Vl200             13 5d14h      18   200  0  1159

The EIGRP configuration is he same on both DSW1 and 2. 

attached is full configuration for all core and distribution switches. You can read them in any text editor. 

Thank you

Paul

What's the reason for multiple EIGRP AS?

for the EIGRP AS 200, it is for another router for the voice gateway. 

You typically shouldn't have the same interface in 2 different AS. It can cause issues in the topology table. Several of your network statements overlap between the 2 AS numbers.

Can you passive-interface vlan 50 and vlan 1203 on DS1 and DS2? I will typically set passive interface as the default and only do no passive on the interfaces where I want EIGRP neighbor relationships to form. You don't need neighbors on every vlan interface.

Have you done any debugs? I think DS1 and DS2 might be sending summary routes for 10.0.0.0/8 to each other through these vlan interfaces. These summary routes will then be advertised to the upstream core switches. If you remove the vlan neighbor relationships, they won't summarize anything to each other since there's no network boundary to cross.

 

I will try it later since it is a production network. 

I made all vlan int to passive-interface. and it worked. thank you for your help. 

When you say the DS configs are mostly the same, does that mean that all DS pairs are EIGRP stub?

 

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