eigrp/ospf redist...

use the lab as before with some new loopbacks, of course...

bye bye rip...

a

add eigrp...

r1#sh run | begin eigrp
router eigrp 1
network 172.16.0.0
network 192.168.0.0 0.0.255.255

r2#sh run | beg eigrp
router eigrp 1
network 172.16.0.0

i put in no auto-summ anyway, but it is the default for later code... habit...

r1#sh ip eigrp neigh
EIGRP-IPv4 Neighbors for AS(1)
H   Address                 Interface              Hold Uptime   SRTT   RTO  Q  Seq
                                                   (sec)         (ms)       Cnt Num
0   172.16.12.2             Se1/0                    14 00:02:30   24  2340  0  3
r1#

the H stands for handle,

This column lists the order in which a peering session was established  with the specified neighbor. The order is specified with sequential  numbering starting with 0.

r1#sh ip route eigrp

Gateway of last resort is not set

      172.16.0.0/16 is variably subnetted, 7 subnets, 2 masks
D        172.16.2.0/24 [90/40640000] via 172.16.12.2, 00:07:14, Serial1/0
D        172.16.23.0/24 [90/41024000] via 172.16.12.2, 00:07:14, Serial1/0
D        172.16.100.0/24 [90/40640000] via 172.16.12.2, 00:07:14, Serial1/0

r2#sh ip route eigrp

Gateway of last resort is not set

      172.16.0.0/16 is variably subnetted, 10 subnets, 2 masks
D        172.16.1.0/24 [90/40640000] via 172.16.12.1, 00:08:04, Serial1/0
D     192.168.48.0/24 [90/40640000] via 172.16.12.1, 00:08:04, Serial1/0
D     192.168.49.0/24 [90/40640000] via 172.16.12.1, 00:08:04, Serial1/0
D     192.168.50.0/24 [90/40640000] via 172.16.12.1, 00:08:04, Serial1/0
D     192.168.51.0/24 [90/40640000] via 172.16.12.1, 00:08:04, Serial1/0
D     192.168.70.0/24 [90/40640000] via 172.16.12.1, 00:08:04, Serial1/0
r2#sh ip eigrp neigh
EIGRP-IPv4 Neighbors for AS(1)
H   Address                 Interface              Hold Uptime   SRTT   RTO  Q  Seq
                                                   (sec)         (ms)       Cnt Num
0   172.16.12.1             Se1/0                    10 00:08:19   42  2340  0  3
r2#

make the serial on r2 connecting to ospf passive for eigrp...

r2#sh ip eigrp int
EIGRP-IPv4 Interfaces for AS(1)
                              Xmit Queue   PeerQ        Mean   Pacing Time   Multicast    Pending
Interface              Peers  Un/Reliable  Un/Reliable  SRTT   Un/Reliable   Flow Timer   Routes
Se1/2                    0        0/0       0/0           0      10/10           0           0
Lo0                      0        0/0       0/0           0       0/0            0           0
Lo100                    0        0/0       0/0           0       0/0            0           0
Se1/0                    1        0/0       0/0          22      10/390        446           0
r2#

both serials are advertising eigrp because it was set up as classful...

r2(config)#router eigrp 1
r2(config-router)#passive-int s1/2

r2#sh ip eigrp int
EIGRP-IPv4 Interfaces for AS(1)
                              Xmit Queue   PeerQ        Mean   Pacing Time   Multicast    Pending
Interface              Peers  Un/Reliable  Un/Reliable  SRTT   Un/Reliable   Flow Timer   Routes
Lo0                      0        0/0       0/0           0       0/0            0           0
Lo100                    0        0/0       0/0           0       0/0            0           0
Se1/0                    1        0/0       0/0          22      10/390        446           0

now they are not... do sh ip proto and i'll let you live...

summarize ONLY lo's 48 and 49...

r1(config)#int s1/0
r1(config-if)#ip summary-add eigrp 1 192.168.48.0 255.255.254.0

r1(config-if)#
*Aug 18 18:15:32: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.12.2 (Serial1/0) is resync: summary configured

r1#sh ip route eigrp

Gateway of last resort is not set

      172.16.0.0/16 is variably subnetted, 7 subnets, 2 masks
D        172.16.2.0/24 [90/40640000] via 172.16.12.2, 00:19:15, Serial1/0
D        172.16.23.0/24 [90/41024000] via 172.16.12.2, 00:19:15, Serial1/0
D        172.16.100.0/24 [90/40640000] via 172.16.12.2, 00:19:15, Serial1/0
D     192.168.48.0/23 is a summary, 00:00:54, Null0

r1#sh ip route 192.168.48.0 255.255.254.0
Routing entry for 192.168.48.0/23, supernet
  Known via "eigrp 1", distance 5, metric 128256, type internal
  Redistributing via eigrp 1
  Routing Descriptor Blocks:
  * directly connected, via Null0
      Route metric is 128256, traffic share count is 1
      Total delay is 5000 microseconds, minimum bandwidth is 8000000 Kbit
      Reliability 255/255, minimum MTU 1514 bytes
      Loading 1/255, Hops 0

why it goes to 5... because 5 is lower than any other dynamic routing AD, thereby avoiding loops... it is only locally significant...

note normal AD on r2...

r2#sh ip route 192.168.48.0 255.255.254.0
Routing entry for 192.168.48.0/23, supernet
  Known via "eigrp 1", distance 90, metric 40640000, type internal
  Redistributing via eigrp 1
  Last update from 172.16.12.1 on Serial1/0, 00:10:54 ago
  Routing Descriptor Blocks:
  * 172.16.12.1, from 172.16.12.1, 00:10:54 ago, via Serial1/0
      Route metric is 40640000, traffic share count is 1
      Total delay is 25000 microseconds, minimum bandwidth is 64 Kbit
      Reliability 255/255, minimum MTU 1500 bytes
      Loading 1/255, Hops 1

better yet, believe subdoh from a cln lift... this is significant...

The summary route is AD 5 on the local router only and the next-hop of that route on the local router is always null0. The reason for it being lower than any internal/external EIGRP is to prevent routing loops. So traffic that matches the summary address will be sent to this router. If this router does not have a more specific route for the destination then you want that traffic to be dropped, hence the reason the AD is set to 5 so it takes priority over any internal or external EIGRP routes


add areas 10 and 20 to r2 and r3, and verify...

r2(config)#router ospf 1
r2(config-router)#netw 172.16.100.0 0.0.0.255 area 10
r2(config-router)#end
r2#
*Aug 18 18:50:09: %SYS-5-CONFIG_I: Configured from console by console
r2#sh ip ospf neigh

Neighbor ID     Pri   State           Dead Time   Address         Interface
192.168.40.1      0   FULL/  -        00:00:38    172.16.23.3     Serial1/2

r3(config)#router ospf 1
r3(config-router)#netw 192.168.8.0 0.0.3.255 area 20
r3(config-router)#end
r3#
*Aug 18 18:50:54: %SYS-5-CONFIG_I: Configured from console by console
r3#sh ip ospf neigh

Neighbor ID     Pri   State           Dead Time   Address         Interface
172.16.2.1        0   FULL/  -        00:00:32    172.16.23.2     Serial1/2

r2#sh ip route ospf

Gateway of last resort is not set

      172.16.0.0/16 is variably subnetted, 10 subnets, 2 masks
O        172.16.3.0/24 [110/1563] via 172.16.23.3, 00:04:05, Serial1/2
      192.168.8.0/32 is subnetted, 1 subnets
O IA     192.168.8.1 [110/1563] via 172.16.23.3, 00:00:54, Serial1/2
      192.168.9.0/32 is subnetted, 1 subnets
O IA     192.168.9.1 [110/1563] via 172.16.23.3, 00:00:54, Serial1/2
      192.168.10.0/32 is subnetted, 1 subnets
O IA     192.168.10.1 [110/1563] via 172.16.23.3, 00:00:54, Serial1/2
      192.168.11.0/32 is subnetted, 1 subnets
O IA     192.168.11.1 [110/1563] via 172.16.23.3, 00:00:54, Serial1/2
O     192.168.20.0/24 [110/1563] via 172.16.23.3, 00:04:05, Serial1/2
O     192.168.25.0/24 [110/1563] via 172.16.23.3, 00:04:05, Serial1/2
O     192.168.30.0/24 [110/1563] via 172.16.23.3, 00:04:05, Serial1/2
      192.168.35.0/32 is subnetted, 1 subnets
O        192.168.35.1 [110/1563] via 172.16.23.3, 00:04:05, Serial1/2
O     192.168.40.0/24 [110/1563] via 172.16.23.3, 00:04:05, Serial1/2

all the loopbacks are /32... you know the drill...

r3(config)#int rang lo8 - 11
r3(config-if-range)#ip ospf netw point-to-p
r3(config-if-range)#end

r2#sh ip route | excl L | Loopback
      
Gateway of last resort is not set

      172.16.0.0/16 is variably subnetted, 10 subnets, 2 masks
D        172.16.1.0/24 [90/40640000] via 172.16.12.1, 00:17:12, Serial1/0
O        172.16.3.0/24 [110/1563] via 172.16.23.3, 00:17:12, Serial1/2
C        172.16.12.0/24 is directly connected, Serial1/0
C        172.16.23.0/24 is directly connected, Serial1/2
O IA  192.168.8.0/24 [110/1563] via 172.16.23.3, 00:03:59, Serial1/2
O IA  192.168.9.0/24 [110/1563] via 172.16.23.3, 00:03:59, Serial1/2
O IA  192.168.10.0/24 [110/1563] via 172.16.23.3, 00:03:59, Serial1/2
O IA  192.168.11.0/24 [110/1563] via 172.16.23.3, 00:03:59, Serial1/2
O     192.168.20.0/24 [110/1563] via 172.16.23.3, 00:17:12, Serial1/2
O     192.168.25.0/24 [110/1563] via 172.16.23.3, 00:17:12, Serial1/2
O     192.168.30.0/24 [110/1563] via 172.16.23.3, 00:17:12, Serial1/2
      192.168.35.0/32 is subnetted, 1 subnets
O        192.168.35.1 [110/1563] via 172.16.23.3, 00:17:12, Serial1/2
O     192.168.40.0/24 [110/1563] via 172.16.23.3, 00:17:12, Serial1/2
D     192.168.48.0/23 [90/40640000] via 172.16.12.1, 00:17:12, Serial1/0
D     192.168.50.0/24 [90/40640000] via 172.16.12.1, 00:17:12, Serial1/0
D     192.168.51.0/24 [90/40640000] via 172.16.12.1, 00:17:12, Serial1/0
D     192.168.70.0/24 [90/40640000] via 172.16.12.1, 00:17:12, Serial1/0

now summarize the those nasty loopbacks on r3...

r3(config)#router ospf 1
r3(config-router)#area 20 range 192.168.8.0 255.255.252.0
 

r2#sh ip route ospf

Gateway of last resort is not set

      172.16.0.0/16 is variably subnetted, 10 subnets, 2 masks
O        172.16.3.0/24 [110/1563] via 172.16.23.3, 00:22:32, Serial1/2
O IA  192.168.8.0/22 [110/1563] via 172.16.23.3, 00:00:14, Serial1/2
O     192.168.20.0/24 [110/1563] via 172.16.23.3, 00:22:32, Serial1/2
O     192.168.25.0/24 [110/1563] via 172.16.23.3, 00:22:32, Serial1/2
O     192.168.30.0/24 [110/1563] via 172.16.23.3, 00:22:32, Serial1/2
      192.168.35.0/32 is subnetted, 1 subnets
O        192.168.35.1 [110/1563] via 172.16.23.3, 00:22:32, Serial1/2
O     192.168.40.0/24 [110/1563] via 172.16.23.3, 00:22:32, Serial1/2