why routes "disappears"

After just couple of minutes

Router26#
Router26#sh ipv6 route 
IPv6 Routing Table - 20 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
       U - Per-user Static route, M - MIPv6
       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
       O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
       D - EIGRP, EX - EIGRP external
R   2001:1B38::/32 [120/16]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
R   2001:4C28:4:1::/64 [120/16]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
R   2001:4C28:7:1::/64 [120/16]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
R   2001:4C28:23:1::/64 [120/16]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
R   2001:4C28:24:2::/64 [120/16]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
R   2001:4C28:25::/64 [120/16]
     via FE80::200:CFF:FE9C:C901, FastEthernet0/1
R   2001:4C28:25:2::/64 [120/16]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
C   2001:4C28:26:1::/64 [0/4294967295]
     via ::, FastEthernet0/1
L   2001:4C28:26:1:201:C7FF:FEEE:B902/128 [0/0]
     via ::, FastEthernet0/1
R   2A00:C10::/32 [120/16]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
R   2A00:7F00::/32 [120/16]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
R   2A01:6A00:4000::/64 [120/16]
     via FE80::200:CFF:FE9C:C901, FastEthernet0/1
R   2A01:6AA0::/64 [120/16]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
R   2A01:6AA0:4000::/64 [120/16]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
C   2A01:6AA0:8000::/64 [0/4294967295]
     via ::, FastEthernet1/0
L   2A01:6AA0:8000:0:260:5CFF:FE30:827B/128 [0/0]
     via ::, FastEthernet1/0
C   2A01:6AA0:C000::/64 [0/4294967295]
     via ::, FastEthernet0/0
L   2A01:6AA0:C000:0:201:C7FF:FEEE:B901/128 [0/0]
     via ::, FastEthernet0/0
R   2A02:5180::/32 [120/16]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
L   FF00::/8 [0/0]
     via ::, Null0

     via ::, Null0

Router26#sh ipv6 route 
IPv6 Routing Table - 9 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
       U - Per-user Static route, M - MIPv6
       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
       O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
       D - EIGRP, EX - EIGRP external
R   2001:4C28:25::/64 [120/6]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
C   2001:4C28:26:1::/64 [0/4294967295]
     via ::, FastEthernet0/1
L   2001:4C28:26:1:201:C7FF:FEEE:B902/128 [0/0]
     via ::, FastEthernet0/1
R   2A01:6A00:4000::/64 [120/6]
     via FE80::2D0:D3FF:FE16:8901, FastEthernet0/1
C   2A01:6AA0:8000::/64 [0/4294967295]
     via ::, FastEthernet1/0
L   2A01:6AA0:8000:0:260:5CFF:FE30:827B/128 [0/0]
     via ::, FastEthernet1/0
C   2A01:6AA0:C000::/64 [0/4294967295]
     via ::, FastEthernet0/0
L   2A01:6AA0:C000:0:201:C7FF:FEEE:B901/128 [0/0]
     via ::, FastEthernet0/0
L   FF00::/8 [0/0]

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Comments

Jon_Cisco

Does debugging show anything? I wonder if some kind of timer is expiring.

OfWolfAndMan

Let's see the distant router's routing table. Are you redistributing these routes? Why did the metric on those routes change from 16 to 6 in the two different tables? Unless you're changing the physical topology, you must be manually setting an external metric, or manipulating the destination route's metric with route maps. Let me see the router config on your distant router as well. Also, there are some caveats when redistributing with IPv6 that you have to know that aren't present in IPv4

theodoxa

Is this GNS3? I've run into the same problem with large topologies. What was happening was that some of the routers would simply fail for no reason and I would start seeing Hold/Dead timers expiring like crazy. I had one topology doing redistribution with OSPF and EIGRP and I could never get all the routers to stay up long enough to reach full convergence.

tomislav91

theodoxa wrote: »

Is this GNS3? I've run into the same problem with large topologies. What was happening was that some of the routers would simply fail for no reason and I would start seeing Hold/Dead timers expiring like crazy. I had one topology doing redistribution with OSPF and EIGRP and I could never get all the routers to stay up long enough to reach full convergence.

How you redistribute ospf in eigrp?I have static routes instead OSPF, and wanted to redistribute, but don't know how, what's your command in that?

Iristheangel

Here you go

The top guide on Redistributing Routing Protocols is pretty decent

xnx

Iristheangel wrote: »

Here you go

The top guide on Redistributing Routing Protocols is pretty decent

Hahahaa

tomislav91

i searched, but nothing find decent..
i found some example and write redistribute static metric x x x x x, but not helped..No one route were redistributed
x was numbers, i don't remember now what were they.

tomislav91

OfWolfAndMan wrote: »

Let's see the distant router's routing table. Are you redistributing these routes? Why did the metric on those routes change from 16 to 6 in the two different tables? Unless you're changing the physical topology, you must be manually setting an external metric, or manipulating the destination route's metric with route maps. Let me see the router config on your distant router as well. Also, there are some caveats when redistributing with IPv6 that you have to know that aren't present in IPv4

Routing table is empty?

Router27#sh ipv6 route 
IPv6 Routing Table - 7 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
       U - Per-user Static route, M - MIPv6
       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
       O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
       D - EIGRP, EX - EIGRP external
C   2001:4C28:26:1::/64 [0/0]
     via ::, FastEthernet0/0
L   2001:4C28:26:1:200:CFF:FE9C:C901/128 [0/0]
     via ::, FastEthernet0/0
C   2A01:6AA0:8000::/64 [0/0]
     via ::, FastEthernet0/1
L   2A01:6AA0:8000:0:200:CFF:FE9C:C902/128 [0/0]
     via ::, FastEthernet0/1
C   2A01:6AA0:C000::/64 [0/0]
     via ::, FastEthernet1/0
L   2A01:6AA0:C000:0:204:9AFF:FE2C:C839/128 [0/0]
     via ::, FastEthernet1/0
L   FF00::/8 [0/0]
     via ::, Null0

Router27#sh run
Building configuration...

Current configuration : 1066 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router27
!
!
!
!
!
ipv6 unicast-routing
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
interface FastEthernet0/0
 ip address 195.242.184.35 255.255.255.248
 duplex auto
 speed auto
 ipv6 address 2001:4C28:26:1::/64 eui-64
 ipv6 rip toma enable 
 ipv6 enable
!
interface FastEthernet0/1
 ip address 176.97.32.2 255.255.224.0
 duplex auto
 speed auto
 ipv6 address 2A01:6AA0:8000::/64 eui-64
 ipv6 rip toma enable 
 ipv6 enable
!
interface FastEthernet1/0
 ip address 62.177.32.1 255.255.224.0
 duplex auto
 speed auto
 ipv6 address 2A01:6AA0:C000::/64 eui-64
 ipv6 rip toma enable 
 ipv6 enable
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 1
 router-id 1.1.1.27
 log-adjacency-changes
 network 176.97.32.0 0.0.31.255 area 0
 network 62.177.32.0 0.0.31.255 area 0
 network 195.242.184.32 0.0.0.7 area 0
!
ipv6 router rip toma
!
ip classless
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end

xnx

router eigrp 100
redistribute ospf 100
network 20.20.20.0 0.0.0.255
default-metric 100000 100 255 1 1500
no auto-summary
!

router ospf 100
redistribute eigrp 100 metric 100 subnets
network 10.10.10.0 0.0.0.255 area 0
default-metric 10

Here's an example - mutual redistribution

tomislav91

xnx wrote: »

router eigrp 100
redistribute ospf 100
network 20.20.20.0 0.0.0.255
default-metric 100000 100 255 1 1500
no auto-summary
!

router ospf 100
redistribute eigrp 100 metric 100 subnets
network 10.10.10.0 0.0.0.255 area 0
default-metric 10

Here's an example - mutual redistribution

Does the eigrp support more then one AS? Because I have 3 AS? I watch some tutorials where said that only 1 AS can in eigrp? I wrote in my

eigrp redistribute static [I]100000 100 255 1 1500[/I]

ipv6 router eigrp 64600
 router-id 2.2.2.10
 no shutdown 
 redistribute static metric 100000 100 255 1 1500

ipv6 router eigrp 65200
 router-id 2.2.2.21
 no shutdown 
 redistribute static metric 100000 100 255 1 1500

ipv6 router eigrp 65200
 router-id 2.2.2.0
 no shutdown 
 redistribute static metric 100000 100 255 1 1500

ipv6 router eigrp 65500
 router-id 2.2.2.2
 no shutdown 
 redistribute static metric 100000 100 255 1 1500 
!

But in the router table there is no routes from another AS...

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