Re: DMVPN eigrp flap issue...

Hi,

Seems like you use the same EIGRP AS to advertise all prefixes. So, you're
getting routes for the tunnel endpoint from two sources (one is a tunnel and
second is the underlying FR network). Hence, your tunnel prefixes flap.

Try to not advertise your FR network (1.1.1.0) in EIGRP.

HTH,

--
Piotr Matusiak
CCIE #19860 (R&S, Security)
Technical Instructor
website: www.MicronicsTraining.com
If you can't explain it simply, you don't understand it well enough -
Albert Einstein
2010/1/26 Naufal Jamal <naufalccie_at_yahoo.in>
> Hey Experts,
>
> I need some valuable help from you on the scenario below:
>
> 1) I am working out dmvpn PHASE 1 on gns3.with 1 HUB and 2 spokes..
>
> 2)I have advertised 1.1.1.0 and 10.0.0.0 networks in eigrp
> I have given "eigrp stub connected" on both the spokes.
> MY eigrp neigh looks like this:
>
> HUB#sh ip eigrp ne
> IP-EIGRP neighbors for process 10
> H   Address                 Interface       Hold Uptime   SRTT   RTO  Q
>  Seq
> Typ
> e
>                                            (sec)         (ms)       Cnt Num
> 3   10.0.0.2                Tu0               13 00:00:06    1  4500  1  0
> 2   10.0.0.3                Tu0               11 00:00:12    1  5000  1  0
> 1   1.1.1.3                 Se0/0.1          151 00:12:27    1  5000  0  14
> 0   1.1.1.2                 Se0/0.1          142 00:12:51  372  2232  0  13
>
> 2)FR works fine but my neighborships flap like anything..
>
> PLS LET ME KNOW IF YOU WANT ANY DEBUG OUTPUTS ON THIS SCENARIO....
>
> HUB#sh run int s0/0.1
> Building configuration...
>
> Current configuration : 188 bytes
> !
> interface Serial0/0.1 multipoint
>  ip address 1.1.1.1 255.255.255.0
>  no ip split-horizon eigrp 10
>  frame-relay map ip 1.1.1.2 101 broadcast
>  frame-relay map ip 1.1.1.3 301 broadcast
> end
>
> interface Tunnel0
>  ip address 10.0.0.1 255.255.255.0
>  no ip redirects
>  ip nhrp authentication cisco
>  ip nhrp map multicast dynamic
>  no ip split-horizon eigrp 10
>  tunnel source Serial0/0.1
>  tunnel mode gre multipoint
>  tunnel key 123
> end
> ------
> SPOKE 1
>
> interface Tunnel0
>  ip address 10.0.0.3 255.255.255.0
>  no ip redirects
>  ip nhrp authentication cisco
>  ip nhrp map multicast 1.1.1.1
>  ip nhrp map 10.0.0.1 1.1.1.1
>  ip nhrp nhs 10.0.0.1
>  tunnel source Serial0/0
>  tunnel destination 1.1.1.1
>  tunnel key 123
> end
>
> SPOKE1(config)#do sh run int s0/0
> Building configuration...
>
> Current configuration : 224 bytes
> !
> interface Serial0/0
>  ip address 1.1.1.3 255.255.255.0
>  encapsulation frame-relay
>  serial restart_delay 0
>  frame-relay map ip 1.1.1.1 401 broadcast
>  frame-relay map ip 1.1.1.2 401 broadcast
>  no frame-relay inverse-arp
> end
>
> SPOKE1(config)#
> ------
>
> SPOKE2
>
> interface Tunnel0
>  ip address 10.0.0.2 255.255.255.0
>  no ip redirects
>  ip nhrp authentication cisco
>  ip nhrp map multicast 1.1.1.1
>  ip nhrp map 10.0.0.1 1.1.1.1
>  ip nhrp nhs 10.0.0.1
>  tunnel source Serial0/0
>  tunnel destination 1.1.1.1
>  tunnel key 123
> end
>
> SPOKE2(config)#do sh run int s0/0
> Building configuration...
>
> Current configuration : 224 bytes
> !
> interface Serial0/0
>  ip address 1.1.1.2 255.255.255.0
>  encapsulation frame-relay
>  serial restart_delay 0
>  frame-relay map ip 1.1.1.1 201 broadcast
>  frame-relay map ip 1.1.1.3 201 broadcast
>  no frame-relay inverse-arp
> end
>
>
>
>
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