From: Fanglo MA (fangloma@xxxxxxxxxxxxxx)
Date: Tue Nov 20 2001 - 00:02:42 GMT-3
>From the debug I get the packet tried to flow out serial but frame relay
reply the dlci was either inactive or deleted. Then check out the switch
found out some route was miss configured.
The router actually selects the path and the best interface to go once I
issue the ping command, I think it might be modular design that makes the
kernel pass the packet layer by layer. Moreover, second thought comes up
this approach can preform some interface checking, yet via another layer.
If the router preforms as I previous said to smart return the ping packet
when it finds the destination is one of its interface, then it might
miss-leading the user and missed information such as the serial is down
actually.
Regards,
Fanglo
On Tue, 20 Nov 2001, Chua, Parry wrote:
> I think the other way, the packet reach the frame relay switch with the
> dlci that
> you configure. But there is no outgoing interface match that dlci for
> out going and hence no return.( I am assuming that a router is configure
> for FR switch).
>
> Parry Chua
> -----Original Message-----
> From: Rajeev Siddappa [mailto:raj_lab@yahoo.com]
> Sent: Tuesday, November 20, 2001 2:11 AM
> To: Fanglo MA; ccielab@groupstudy.com
> Subject: RE: Can't ping FR own interface
>
>
> Hi,
>
> When the packet goes out of interface it will be layer
> 2 and when it come sout to u r framely interafce the
> layer 2 packet will look for an mapping. which it will
> not find, because there is no mapping. It will result
> in encapsulation error.
>
> I think it clears u r doubt.
>
> Rajeev.
>
>
>
>
>
>
>
> --- Fanglo MA <fangloma@pacific.net.hk> wrote:
> > Dear ALL,
> >
> > Eventually I get done to ping the FR own interface!
> > It is something wrong
> > setting in my switch. But it comes up to my mind
> > that why the interface
> > or the IOS cannot return at layer 3 when the source
> > and target layer 3
> > address is the same as one of its interface address
> > but go down into layer
> > 2?
> >
> > Regards,
> > Fanglo
> >
> > On Mon, 19 Nov 2001, Fanglo MA wrote:
> >
> > > Hi,
> > >
> > > Still no luck with no frame-relay inverse-arp.
> > show frame-relay pvc still
> > > note me the DCLI is deleted. Have search CCO but
> > can get any useful info
> > > concerning about deleted DCLI and under what
> > situation DCLI will be
> > > deleted. Does it need some script in FR-switch to
> > enable it?
> > >
> > > Regards,
> > > Fanglo
> > >
> > > On Sun, 18 Nov 2001, Maurizio Roggia wrote:
> > >
> > > > no frame-relay inverse-arp
> > > >
> > > > -----Original Message-----
> > > > From: nobody@groupstudy.com
> > [mailto:nobody@groupstudy.com]On Behalf Of
> > > > Fanglo MA
> > > > Sent: 18 November 2001 16:28
> > > > To: Joseph H Marti
> > > > Cc: ccielab@groupstudy.com
> > > > Subject: Re: Can't ping FR own interface
> > > >
> > > >
> > > > Dear Joseph,
> > > >
> > > > To simplify the case, the same actually happen
> > at R4. i.e. R4 cannot ping
> > > > itself serial 0. I add the config with R4 as:
> > > >
> > > > host r4
> > > > !
> > > > int s0
> > > > ip address 192.168.252.4 255.255.255.0
> > > > encap frame
> > > > frame-relay map ip 192.168.252.3 321
> > > > frame-relay map ip 192.168.252.4 123
> > > > frame-relay interface-dlci 123
> > > > no shut
> > > > !
> > > >
> > > > BUT THE SAME CASE HAPPEN! I still be timeout.
> > I'm using 12.1.11 image. Any
> > > > suggestion?
> > > >
> > > > Regards,
> > > > Fanglo
> > > >
> > > > On Sun, 18 Nov 2001, Joseph H Marti wrote:
> > > >
> > > > > There's no layer 3 to layer 2 mapping. Add FR
> > map statement with local IP
> > > > > address and dlci.
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Fanglo MA" <fangloma@pacific.net.hk>
> > > > > To: <ccielab@groupstudy.com>
> > > > > Sent: Sunday, November 18, 2001 6:39 AM
> > > > > Subject: Can't ping FR own interface
> > > > >
> > > > >
> > > > > > Hi ALL,
> > > > > >
> > > > > > I am reviewing FR and find that I cannot
> > ping the router own FR serial.
> > > > I
> > > > > > can ping from other routers via the FR but I
> > cannot ping itself from the
> > > > > > router. I can ping other own serial
> > interface from the router too.
> > > > Anyone
> > > > > > would have suggestions or reason why I can't
> > ping? Below is my config.
> > > > > >
> > > > > > R3 config
> > > > > > host r3
> > > > > > !
> > > > > > int s0
> > > > > > ip address 192.168.252.3 255.255.255.0
> > > > > > encap frame
> > > > > > frame-relay map ip 192.168.252.4 123
> > > > > > frame-relay map ip 192.168.252.5 124
> > > > > > no shut
> > > > > > !
> > > > > > int s1
> > > > > > ip address 192.168.250.3 255.255.255.0
> > > > > > no shut
> > > > > > !
> > > > > >
> > > > > > R4 config
> > > > > > host r4
> > > > > > !
> > > > > > int s0
> > > > > > ip address 192.168.252.4 255.255.255.0
> > > > > > encap frame
> > > > > > frame-relay map ip 192.168.252.321
> > > > > > no shut
> > > > > > !
> > > > > >
> > > > > > R5 config
> > > > > > host r5
> > > > > > !
> > > > > > int s0
> > > > > > ip address 192.168.252.4 255.255.255.0
> > > > > > encap frame
> > > > > > frame-relay map ip 192.168.252.3 421
> > > > > > no shut
> > > > > > !
> > > > > >
> > > > > > R4, R5 can do ping to R3
> > > > > > R3 can do ping to R4, R5
> > > > > >
> > > > > > R3 can do ping to its s1
> > > > > > BUT R3 TIMEOUT WHEN PING ITS S0.
> > > > > >
> > > > > > Regards,
> > > > > > Fanglo
> >
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