RE: Does eigrp need "network type" like ospf in NBMA

From: Phong Tran Tien (PhongTT2@FPT.COM.VN)
Date: Mon Mar 24 2003 - 19:09:04 GMT-3

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IP split-horizon is enable by default, but when you change the encapsulcation from hdlc, ppp... to frame-relay, split-hoziron will be turn off in frame-relay physical interface. Always check this in your lab using "show ip int type-number" command.
 
split-horizon should be turned on to prevent loops. The only case you should turn it off is frame-relay point-to-multipoint subinterface. If you using subinterface at the hub, you should use the command "no ip split-horizon eigrp xxx" at the subinterface.
 
in your topology, if you encapsulate R3 S0 and S1 int by frame-relay and do not use subinterface, split horizon will be turned off automatically on these interfaces and you MUST manually turned it on. If you forget to do this, it can kill you in your lab.
 
Hope this helps
Tran Tien Phong
CCIE #11285

        -----Original Message-----
        From: Pedro Eira [mailto:pdaeira@hotmail.com]
        Sent: Mon 3/24/2003 9:09 PM
        To: Phong Tran Tien
        Cc: ccielab@groupstudy.com
        Subject: RE: Does eigrp need "network type" like ospf in NBMA enviroment?
        
        

        What if you had an example like the following, would you turn off EIGRP split horizon in both S0 and S1 on router 3???

        |------e0-R1-e1------e0-R2-s0------s0-R3-s1------s0-R4-e0------|

        Pedro.
        
        

>From: "Phong Tran Tien"
>Reply-To: "Phong Tran Tien"
>To: "Fan Shan" ,
>Subject: RE: Does eigrp need "network type" like ospf in NBMA enviroment?
>Date: Sun, 23 Mar 2003 17:30:34 +0700
>
>No, but pay attention to the IP split-horizon rule. Split horizon should be turned off at hub site if using physical interface
>
>CCIE #11285
>
> -----Original Message-----
> From: Fan Shan [mailto:shanf@public.jn.sd.cn]
> Sent: Sun 3/23/2003 2:19 PM
> To: ccielab@groupstudy.com
> Cc:
> Subject: Does eigrp need "network type" like ospf in NBMA enviroment?
>
>
>
> Does eigrp need "network type" like ospf in NBMA enviroment?
> a fool question,but I suddenly got confused

  _____

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