From: Olugbenga Adanlawo (gbengaadan@hotmail.com)
Date: Wed Aug 20 2008 - 16:50:03 ART
The default behaviour of PPP encapsulation is to advertise neighbor route as
/32. This is very helpful when using ip unnumbered of the interface. You can
disable thus behaviour since the two end are on thesame ip subnet with the no
peer neighbor-route command
--------------------------------------------------
From: <yungli2008@gmail.com>
Sent: Wednesday, August 20, 2008 5:23 PM
To: <ccielab@groupstudy.com>
Subject: serial-link address
> Hi experts
>
> I am facing this in dynamip with c3640-jk9o3s-mz.124-16.bin IOS
>
> here is my scenario
>
> R4(S1/1)---PPP----(s1/1)R5
>
> R4
> int s1/0
> ip add 163.1.45.4 255.255.255.0
> encap ppp
> no sh
>
> R5
> int s1/0
> ip add 163.1.45.5 255.255.255.0
> encap ppp
> no sh
>
> ---------------
>
> R4
> Rack1R4(config)#do sh ip rou con
> 163.1.0.0/16 is variably subnetted, 6 subnets, 2 masks
> C 163.1.45.5/32 is directly connected, Serial1/1
> C 163.1.45.0/24 is directly connected, Serial1/1
> C 163.1.0.0/24 is directly connected, Serial1/0
>
>
> R5
> Rack1R5(config-if)#do sh ip rou con
> 163.1.0.0/16 is variably subnetted, 6 subnets, 2 masks
> C 163.1.45.4/32 is directly connected, Serial1/1
> C 163.1.45.0/24 is directly connected, Serial1/1
> C 163.1.0.0/24 is directly connected, Serial1/0
>
> ---------------
>
> Why the interface serial 1/1 shows two mask?
>
> If i changed the encapsulation ppp to default hdlc then it shows single
mask.
>
> Would you please anyone explain me?
>
> Advance thanks
> Li
>
>
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