Question

EIGRP - how to use "ip default-network" command?

Asked by: pseudocyber

Hi Everyone,

I'm studying for my BSCI exam - EIGRP and trying to get the "ip default-network" command to work correctly.

I have three routers in a rectangle, and have added an int l666 interface with an IP of 6.6.6.6/32. I've included network 6.0.0.0/8 in my EIGRP networks and the other routers are seeing it from EIGRP.

When I go to add the "ip default-netwok 6.0.0.0" command, to make it the default route and advertise that through eigrp it's not working. I have tried it several ways, but it just won't work.

Could anyone tell me what I'm doing wrong?

Thanks,

PC

Router11#show run
Building configuration...
 
Current configuration : 1562 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router11
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip subnet-zero
!
!
ip host Router13 10.13.0.1
ip host Router4 10.4.0.1
!
!
!
!         
!
!
!
!
!
!
no voice hpi capture buffer
no voice hpi capture destination 
!
!
!
!
!
!
interface Loopback0
 ip address 10.11.0.1 255.255.255.0
!
interface Loopback1
 ip address 10.11.1.1 255.255.255.0
!
interface Loopback2
 ip address 10.11.2.1 255.255.255.0
!         
interface Loopback3
 ip address 10.11.3.1 255.255.255.0
!
interface Loopback4
 ip address 10.11.4.1 255.255.255.0
!
interface Loopback666
 ip address 6.6.6.6 255.255.255.255
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/0
 bandwidth 1500
 ip address 192.168.2.1 255.255.255.252
 ip summary-address eigrp 100 10.11.0.0 255.255.248.0 5
 service-module t1 cablelength short 110ft
 service-module t1 clock source internal
!
interface Serial0/1
 bandwidth 1500
 ip address 192.168.1.1 255.255.255.252
 ip summary-address eigrp 100 10.11.0.0 255.255.248.0 5
 ip summary-address eigrp 100 10.11.0.0 255.255.0.0 5
 service-module t1 cablelength short 110ft
 service-module t1 clock source internal
!
router eigrp 100
 network 6.0.0.0
 network 10.11.0.0 0.0.255.255
 network 192.168.0.0 0.0.255.255
 no auto-summary
!
no ip http server
ip classless
ip default-network 6.0.0.0
!
!
access-list 1 permit 10.11.0.0 0.0.8.255
!
!
!
!         
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
!
end
 
Router11#  
Router11#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route
 
Gateway of last resort is not set
 
 *   6.0.0.0/32 is subnetted, 1 subnets
C       6.6.6.6 is directly connected, Loopback666
     10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks
C       10.11.1.0/24 is directly connected, Loopback1
C       10.11.0.0/24 is directly connected, Loopback0
D       10.11.0.0/21 is a summary, 02:13:05, Null0
D       10.11.0.0/16 is a summary, 02:13:05, Null0
C       10.11.3.0/24 is directly connected, Loopback3
C       10.11.2.0/24 is directly connected, Loopback2
C       10.11.4.0/24 is directly connected, Loopback4
D       10.13.0.0/21 [90/2346496] via 192.168.2.2, 02:13:07, Serial0/0
D       10.4.0.0/21 [90/2346496] via 192.168.1.2, 02:13:07, Serial0/1
     192.168.1.0/30 is subnetted, 1 subnets
C       192.168.1.0 is directly connected, Serial0/1
     192.168.2.0/30 is subnetted, 2 subnets
C       192.168.2.0 is directly connected, Serial0/0
D       192.168.2.4 [90/2244096] via 192.168.2.2, 02:13:08, Serial0/0
                    [90/2244096] via 192.168.1.2, 02:13:08, Serial0/1
Router11#show ip eigrp top
IP-EIGRP Topology Table for AS(100)/ID(192.168.2.1)
 
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status 
 
P 6.6.6.6/32, 1 successors, FD is 128256
        via Connected, Loopback666
P 10.11.1.0/24, 1 successors, FD is 128256
        via Connected, Loopback1
P 10.11.0.0/16, 1 successors, FD is 128256
        via Summary (128256/0), Null0
P 10.11.0.0/21, 1 successors, FD is 128256
        via Summary (128256/0), Null0
P 10.11.0.0/24, 1 successors, FD is 128256
        via Connected, Loopback0
P 10.11.3.0/24, 1 successors, FD is 128256
        via Connected, Loopback3
P 10.11.2.0/24, 1 successors, FD is 128256
        via Connected, Loopback2
P 10.11.4.0/24, 1 successors, FD is 128256
        via Connected, Loopback4
P 10.13.0.0/21, 1 successors, FD is 2346496
        via 192.168.2.2 (2346496/128256), Serial0/0
          
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status 
 
        via 192.168.1.2 (2372096/153856), Serial0/1
P 10.4.0.0/21, 1 successors, FD is 2346496
        via 192.168.1.2 (2346496/128256), Serial0/1
        via 192.168.2.2 (2372096/153856), Serial0/0
P 192.168.1.0/30, 1 successors, FD is 2218496
        via Connected, Serial0/1
P 192.168.2.0/30, 1 successors, FD is 2218496
        via Connected, Serial0/0
P 192.168.2.4/30, 2 successors, FD is 2244096
        via 192.168.1.2 (2244096/25856), Serial0/1
        via 192.168.2.2 (2244096/25856), Serial0/0
Router11#
Router11#
Router11#show ip eigrp neigh
IP-EIGRP neighbors for process 100
H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq
                                            (sec)         (ms)       Cnt Num
0   192.168.1.2             Se0/1             14 02:13:25    4   200  0  213
1   192.168.2.2             Se0/0             11 05:58:49    1   200  0  241
Router11#
Router11#show ip proto
Routing Protocol is "eigrp 100"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Default networks flagged in outgoing updates
  Default networks accepted from incoming updates
  EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
  EIGRP maximum hopcount 100
  EIGRP maximum metric variance 1
  Redistributing: eigrp 100
  EIGRP NSF-aware route hold timer is 240s
  Automatic network summarization is not in effect
  Address Summarization:
    10.11.0.0/21 for Serial0/0, Serial0/1
      Summarizing with metric 128256
    10.11.0.0/16 for Serial0/1
      Summarizing with metric 128256
  Maximum path: 4
  Routing for Networks:
    6.0.0.0
    10.11.0.0/16
    192.168.0.0/16
  Routing Information Sources:
    Gateway         Distance      Last Update
    Gateway         Distance      Last Update
    (this router)         90      02:13:33
    192.168.2.2           90      02:13:33
    192.168.1.2           90      02:13:34
  Distance: internal 90 external 170
 
Router11#
 
 
*************************************************************
 
Router13#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route
 
Gateway of last resort is not set
 
     6.0.0.0/32 is subnetted, 1 subnets
D       6.6.6.6 [90/2346496] via 192.168.2.1, 02:14:04, Serial0/0
     10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks
D       10.11.0.0/16 [90/2372096] via 192.168.2.6, 02:14:04, Ethernet0/0
D       10.11.0.0/21 [90/2346496] via 192.168.2.1, 02:14:04, Serial0/0
C       10.13.4.0/24 is directly connected, Loopback4
C       10.13.3.0/24 is directly connected, Loopback3
C       10.13.2.0/24 is directly connected, Loopback2
C       10.13.1.0/24 is directly connected, Loopback1
D       10.13.0.0/21 is a summary, 07:17:03, Null0
C       10.13.0.0/24 is directly connected, Loopback0
D       10.4.0.0/21 [90/153856] via 192.168.2.6, 02:14:06, Ethernet0/0
     192.168.1.0/30 is subnetted, 1 subnets
D       192.168.1.0 [90/2244096] via 192.168.2.6, 02:14:08, Ethernet0/0
     192.168.2.0/30 is subnetted, 2 subnets
C       192.168.2.0 is directly connected, Serial0/0
C       192.168.2.4 is directly connected, Ethernet0/0
Router13#show ip eigrp neigh
IP-EIGRP neighbors for process 100
H   Address                 Interface   Hold Uptime   SRTT   RTO  Q  Seq Type
                                        (sec)         (ms)       Cnt Num
1   192.168.2.6             Et0/0         12 02:14:18  308  1848  0  214   
0   192.168.2.1             Se0/0         10 05:59:37   19   200  0  213   
Router13#show ip eigrp top
IP-EIGRP Topology Table for AS(100)/ID(192.168.2.5)
 
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status 
 
P 6.6.6.6/32, 1 successors, FD is 2346496
         via 192.168.2.1 (2346496/128256), Serial0/0
P 10.11.0.0/16, 1 successors, FD is 2372096
         via 192.168.2.6 (2372096/2346496), Ethernet0/0
P 10.11.0.0/21, 1 successors, FD is 2346496
         via 192.168.2.1 (2346496/128256), Serial0/0
P 10.13.4.0/24, 1 successors, FD is 128256
         via Rconnected (128256/0)
P 10.13.3.0/24, 1 successors, FD is 128256
         via Rconnected (128256/0)
P 10.13.2.0/24, 1 successors, FD is 128256
         via Rconnected (128256/0)
P 10.13.1.0/24, 1 successors, FD is 128256
         via Rconnected (128256/0)
P 10.13.0.0/21, 1 successors, FD is 128256
         via Summary (128256/0), Null0
P 10.13.0.0/24, 1 successors, FD is 128256
         via Rconnected (128256/0)
          
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status 
 
P 10.4.0.0/21, 1 successors, FD is 153856
         via 192.168.2.6 (153856/128256), Ethernet0/0
P 192.168.1.0/30, 1 successors, FD is 2244096
         via 192.168.2.6 (2244096/2218496), Ethernet0/0
         via 192.168.2.1 (2730496/2218496), Serial0/0
P 192.168.2.0/30, 1 successors, FD is 2178560
         via Connected, Serial0/0
P 192.168.2.4/30, 1 successors, FD is 25856
         via Connected, Ethernet0/0
Router13#
 
--------------------------------------------------------------------------------------------------
 
 
Router13#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route
 
Gateway of last resort is not set
 
     6.0.0.0/32 is subnetted, 1 subnets
D       6.6.6.6 [90/2346496] via 192.168.2.1, 02:14:04, Serial0/0
     10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks
D       10.11.0.0/16 [90/2372096] via 192.168.2.6, 02:14:04, Ethernet0/0
D       10.11.0.0/21 [90/2346496] via 192.168.2.1, 02:14:04, Serial0/0
C       10.13.4.0/24 is directly connected, Loopback4
C       10.13.3.0/24 is directly connected, Loopback3
C       10.13.2.0/24 is directly connected, Loopback2
C       10.13.1.0/24 is directly connected, Loopback1
D       10.13.0.0/21 is a summary, 07:17:03, Null0
C       10.13.0.0/24 is directly connected, Loopback0
D       10.4.0.0/21 [90/153856] via 192.168.2.6, 02:14:06, Ethernet0/0
     192.168.1.0/30 is subnetted, 1 subnets
D       192.168.1.0 [90/2244096] via 192.168.2.6, 02:14:08, Ethernet0/0
     192.168.2.0/30 is subnetted, 2 subnets
C       192.168.2.0 is directly connected, Serial0/0
C       192.168.2.4 is directly connected, Ethernet0/0
Router13#show ip eigrp neigh
IP-EIGRP neighbors for process 100
H   Address                 Interface   Hold Uptime   SRTT   RTO  Q  Seq Type
                                        (sec)         (ms)       Cnt Num
1   192.168.2.6             Et0/0         12 02:14:18  308  1848  0  214   
0   192.168.2.1             Se0/0         10 05:59:37   19   200  0  213   
Router13#show ip eigrp top
IP-EIGRP Topology Table for AS(100)/ID(192.168.2.5)
 
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status 
 
P 6.6.6.6/32, 1 successors, FD is 2346496
         via 192.168.2.1 (2346496/128256), Serial0/0
P 10.11.0.0/16, 1 successors, FD is 2372096
         via 192.168.2.6 (2372096/2346496), Ethernet0/0
P 10.11.0.0/21, 1 successors, FD is 2346496
         via 192.168.2.1 (2346496/128256), Serial0/0
P 10.13.4.0/24, 1 successors, FD is 128256
         via Rconnected (128256/0)
P 10.13.3.0/24, 1 successors, FD is 128256
         via Rconnected (128256/0)
P 10.13.2.0/24, 1 successors, FD is 128256
         via Rconnected (128256/0)
P 10.13.1.0/24, 1 successors, FD is 128256
         via Rconnected (128256/0)
P 10.13.0.0/21, 1 successors, FD is 128256
         via Summary (128256/0), Null0
P 10.13.0.0/24, 1 successors, FD is 128256
         via Rconnected (128256/0)
          
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status 
 
P 10.4.0.0/21, 1 successors, FD is 153856
         via 192.168.2.6 (153856/128256), Ethernet0/0
P 192.168.1.0/30, 1 successors, FD is 2244096
         via 192.168.2.6 (2244096/2218496), Ethernet0/0
         via 192.168.2.1 (2730496/2218496), Serial0/0
P 192.168.2.0/30, 1 successors, FD is 2178560
         via Connected, Serial0/0
P 192.168.2.4/30, 1 successors, FD is 25856
         via Connected, Ethernet0/0
Router13#

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Asked On: 2009-05-14 at 12:09:39ID24409840
Tags: Cisco
,; routing
,; eigrp
,; default-network
Topics: Networking Protocols
,; Network Design & Methodology
Participating Experts: 1
Points: 500
Comments: 13

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by: ksims1129Posted on 2009-05-14 at 20:23:20ID: 24391998

I just passed the BSCI a few months ago. Im only one away from my CCNP. No to see if i can explain this for you. you have the ip default-network issued on the router where the network is directly connected. it only works if you would lets say go to Router 13 and issue the command ip default-network 6.0.0.0. You would immedialey see

Gateway of last resort is 192.168.2.1 network 6.0.0.0

If you have any questions let me know.i will also see if i can find somethind on the cisco site to send you.

by: pseudocyberPosted on 2009-05-15 at 04:06:11ID: 24394101

Hi ksims,

Congrats on passing - I failed a month ago ... :(

Ok - here's me doing what you say and it not working.

I created a loopback, L666
I added an IP to it 6.6.6.6/32
I added network 6.0.0.0/8 to eigrp 100
I verified on router 2, that it got the route for 6.0.0.0 through eigrp
On Router 1, I issued "ip default-network 6.0.0.0" and saw it in the route table, on router1
On Router2 - still no candidate default.

I'm pasting all of this below - first router 1, and then below that router2 with the show ip route at different stages.

Thanks for your help,

PC

Router1#
Router1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#int l666
Router1(config-if)#ip address
*Mar 11 14:54:20.311: %LINK-3-UPDOWN: Interface Loopback666, changed state to up
*Mar 11 14:54:21.313: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback666, changed state to up6.6.6.6 255.255.255.255
Router1(config-if)#^Z
Router1#
*Mar 11 14:54:31.037: %SYS-5-CONFIG_I: Configured from console by console
Router1#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

6.0.0.0/32 is subnetted, 1 subnets
C 6.6.6.6 is directly connected, Loopback666
10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks
C 10.11.1.0/24 is directly connected, Loopback1
C 10.11.0.0/24 is directly connected, Loopback0
D 10.11.0.0/21 is a summary, 18:07:40, Null0
D 10.11.0.0/16 is a summary, 18:07:40, Null0
C 10.11.3.0/24 is directly connected, Loopback3
C 10.11.2.0/24 is directly connected, Loopback2
C 10.11.4.0/24 is directly connected, Loopback4
D 10.13.0.0/21 [90/2346496] via 192.168.2.2, 18:07:42, Serial0/0
D 10.4.0.0/21 [90/2346496] via 192.168.1.2, 18:07:42, Serial0/1
192.168.1.0/30 is subnetted, 1 subnets
C 192.168.1.0 is directly connected, Serial0/1
192.168.2.0/30 is subnetted, 2 subnets
C 192.168.2.0 is directly connected, Serial0/0
D 192.168.2.4 [90/2244096] via 192.168.2.2, 18:07:44, Serial0/0
[90/2244096] via 192.168.1.2, 18:07:43, Serial0/1
Router1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#ip eigrp 100
^
% Invalid input detected at '^' marker.

Router1(config)#ip eigrp 100
^
% Invalid input detected at '^' marker.

Router1(config)#router eigrp 100
Router1(config-router)#network 6.0.0.0
Router1(config-router)#^Z
Router1#
*Mar 11 14:55:08.518: %SYS-5-CONFIG_I: Configured from console by console
Router1#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

6.0.0.0/32 is subnetted, 1 subnets
C 6.6.6.6 is directly connected, Loopback666
10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks
C 10.11.1.0/24 is directly connected, Loopback1
C 10.11.0.0/24 is directly connected, Loopback0
D 10.11.0.0/21 is a summary, 18:08:17, Null0
D 10.11.0.0/16 is a summary, 18:08:17, Null0
C 10.11.3.0/24 is directly connected, Loopback3
C 10.11.2.0/24 is directly connected, Loopback2
C 10.11.4.0/24 is directly connected, Loopback4
D 10.13.0.0/21 [90/2346496] via 192.168.2.2, 18:08:19, Serial0/0
D 10.4.0.0/21 [90/2346496] via 192.168.1.2, 18:08:19, Serial0/1
192.168.1.0/30 is subnetted, 1 subnets
C 192.168.1.0 is directly connected, Serial0/1
192.168.2.0/30 is subnetted, 2 subnets
C 192.168.2.0 is directly connected, Serial0/0
D 192.168.2.4 [90/2244096] via 192.168.2.2, 18:08:20, Serial0/0
[90/2244096] via 192.168.1.2, 18:08:20, Serial0/1
Router1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#ip default-net
Router1(config)#ip default-network ?
A.B.C.D IP address of default network

Router1(config)#ip default-network 6.0.0.0 ?
<cr>

Router1(config)#ip default-network 6.0.0.0
Router1(config)#^Z
Router1#
Router1#show
*Mar 11 14:55:42.197: %SYS-5-CONFIG_I: Configured from console by console ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

* 6.0.0.0/32 is subnetted, 1 subnets
C 6.6.6.6 is directly connected, Loopback666
10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks
C 10.11.1.0/24 is directly connected, Loopback1
C 10.11.0.0/24 is directly connected, Loopback0
D 10.11.0.0/21 is a summary, 18:08:50, Null0
D 10.11.0.0/16 is a summary, 18:08:49, Null0
C 10.11.3.0/24 is directly connected, Loopback3
C 10.11.2.0/24 is directly connected, Loopback2
C 10.11.4.0/24 is directly connected, Loopback4
D 10.13.0.0/21 [90/2346496] via 192.168.2.2, 18:08:52, Serial0/0
D 10.4.0.0/21 [90/2346496] via 192.168.1.2, 18:08:52, Serial0/1
192.168.1.0/30 is subnetted, 1 subnets
C 192.168.1.0 is directly connected, Serial0/1
192.168.2.0/30 is subnetted, 2 subnets
C 192.168.2.0 is directly connected, Serial0/0
D 192.168.2.4 [90/2244096] via 192.168.2.2, 18:08:52, Serial0/0
[90/2244096] via 192.168.1.2, 18:08:52, Serial0/1
Router1#

-----------------------------------------------------------------------------------------------

Router2#show ip rout
1w1d: %SYS-5-CONFIG_I: Configured from console by consolee
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route

Gateway of last resort is not set

10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks
D 10.11.0.0/16 [90/2372096] via 192.168.2.6, 18:06:47, Ethernet0/0
D 10.11.0.0/21 [90/2346496] via 192.168.2.1, 18:06:47, Serial0/0
C 10.13.4.0/24 is directly connected, Loopback4
C 10.13.3.0/24 is directly connected, Loopback3
C 10.13.2.0/24 is directly connected, Loopback2
C 10.13.1.0/24 is directly connected, Loopback1
D 10.13.0.0/21 is a summary, 23:09:46, Null0
C 10.13.0.0/24 is directly connected, Loopback0
D 10.4.0.0/21 [90/153856] via 192.168.2.6, 18:06:49, Ethernet0/0
192.168.1.0/30 is subnetted, 1 subnets
D 192.168.1.0 [90/2244096] via 192.168.2.6, 18:06:51, Ethernet0/0
192.168.2.0/30 is subnetted, 2 subnets
C 192.168.2.0 is directly connected, Serial0/0
C 192.168.2.4 is directly connected, Ethernet0/0
Router2#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route

Gateway of last resort is not set

6.0.0.0/32 is subnetted, 1 subnets
D 6.6.6.6 [90/2346496] via 192.168.2.1, 00:00:16, Serial0/0
10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks
D 10.11.0.0/16 [90/2372096] via 192.168.2.6, 18:08:27, Ethernet0/0
D 10.11.0.0/21 [90/2346496] via 192.168.2.1, 18:08:27, Serial0/0
C 10.13.4.0/24 is directly connected, Loopback4
C 10.13.3.0/24 is directly connected, Loopback3
C 10.13.2.0/24 is directly connected, Loopback2
C 10.13.1.0/24 is directly connected, Loopback1
D 10.13.0.0/21 is a summary, 23:11:26, Null0
C 10.13.0.0/24 is directly connected, Loopback0
D 10.4.0.0/21 [90/153856] via 192.168.2.6, 18:08:29, Ethernet0/0
192.168.1.0/30 is subnetted, 1 subnets
D 192.168.1.0 [90/2244096] via 192.168.2.6, 18:08:32, Ethernet0/0
192.168.2.0/30 is subnetted, 2 subnets
C 192.168.2.0 is directly connected, Serial0/0
C 192.168.2.4 is directly connected, Ethernet0/0
Router2#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route

Gateway of last resort is not set

6.0.0.0/32 is subnetted, 1 subnets
D 6.6.6.6 [90/2346496] via 192.168.2.1, 00:00:46, Serial0/0
10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks
D 10.11.0.0/16 [90/2372096] via 192.168.2.6, 18:08:57, Ethernet0/0
D 10.11.0.0/21 [90/2346496] via 192.168.2.1, 18:08:57, Serial0/0
C 10.13.4.0/24 is directly connected, Loopback4
C 10.13.3.0/24 is directly connected, Loopback3
C 10.13.2.0/24 is directly connected, Loopback2
C 10.13.1.0/24 is directly connected, Loopback1
D 10.13.0.0/21 is a summary, 23:11:57, Null0
C 10.13.0.0/24 is directly connected, Loopback0
D 10.4.0.0/21 [90/153856] via 192.168.2.6, 18:08:59, Ethernet0/0
192.168.1.0/30 is subnetted, 1 subnets
D 192.168.1.0 [90/2244096] via 192.168.2.6, 18:09:02, Ethernet0/0
192.168.2.0/30 is subnetted, 2 subnets
C 192.168.2.0 is directly connected, Serial0/0
C 192.168.2.4 is directly connected, Ethernet0/0
Router2#

by: ksims1129Posted on 2009-05-15 at 04:31:35ID: 24394273

thats not what i said.
Router11(config)#ip default-network 6.0.0.0

Router13(config)#ip default-network 6.0.0.0

you have to issue the command on every router that you want to use 6.0.0.0 network as the default network.

by: pseudocyberPosted on 2009-05-15 at 05:07:09ID: 24394532

You do!?!?

I thought it's supposed to propagate through the EIRGP domain.

"A router configured with this command considers the network-number the last-resort gateway that it will announce to other routers. The network must be reachable by the router that uses this command before it announces it as a candidate default route to other EIGRP routers. The network number in this command must also be passed to other EIGRP routers so that those routers can use this network as their default network and set their gateway of last resort to this default network."

If I have to go issue this command on every single router - why wouldn't I just manually set the default gateway while I'm there?

Plus, ..."Multiple default networks can be configured: downstream routers then use the EIGRP metric to determine the best default route".

It sounds to me like this command is used near the Internet edge of the network - then the rest of the EIGRP domain learns of it.

by: ksims1129Posted on 2009-05-15 at 05:10:29ID: 24394559

Yes you do. It does not propagate the route in EIGRP. the only way to redistribute it is to use the command Router(Config-router)#redistribute static
this will inject any static routes you have configured. you can use route maps to make sure the right static routes get redistributed.I dont know of any other way. If someone does please chime in.

by: pseudocyberPosted on 2009-05-15 at 05:19:31ID: 24394619

Well, while we're waiting on others to chime in ... ;)

You can configure a default route at your edge - like 0.0.0.0 0.0.0.0 next hop x. Then, if you go into EIGRP and advertise network 0.0.0.0 - all your other EIGRP routers will learn about the default route that way - but that's not using the command - it's "cheating". :)

Still - it really looks to me like this command is supposed to propogate.

by: pseudocyberPosted on 2009-05-15 at 05:20:12ID: 24394626

Ok, I found this:

"Gateways of last resort selected using the ip default-network command are propagated differently depending on which routing protocol is propagating the default route. For IGRP and EIGRP to propagate the route, the network specified by the ip default-network command must be known to IGRP or EIGRP. This means the network must be an IGRP- or EIGRP-derived network in the routing table, or the static route used to generate the route to the network must be redistributed into IGRP or EIGRP, or advertised into these protocols using the network command"

Here: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094374.shtml

by: ksims1129Posted on 2009-05-15 at 05:22:12ID: 24394645

ok. that sounds how i learned it. So, The best way to do it is redistribute the static route

by: pseudocyberPosted on 2009-05-15 at 05:25:13ID: 24394677

So... you think I'm making a moutain out of a mole hill? The way I'm doing the command is correct - and should work - and to move on? ;)

by: ksims1129Posted on 2009-05-15 at 05:27:45ID: 24394696

yes. i would move on trust me this won't be your last problems such as this you will run into things like this all the time. the only way to learn it is to do it. Stay in the lab and keep working hard. GOOD LUCK!!!

by: pseudocyberPosted on 2009-05-15 at 05:29:30ID: 24394706

Thanks! :)

by: pseudocyberPosted on 2009-05-15 at 05:29:51ID: 31581632

Thanks.

by: pseudocyberPosted on 2009-05-19 at 10:52:37ID: 24424581

Addendum - turns out my Sr. Engineer found the answer. The network wasn't being summarized going out the interfaces. So, the other routers had a more specific route and were choosing it. Once summarization was put on the interfaces, it worked like a charm.

20120131-EE-VQP-002

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EIGRP - how to use "ip default-network" command?

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