From: Cisco Net (network.cisco@gmail.com)
Date: Tue Oct 12 2004 - 17:17:19 GMT-3
Brian/Jongsoo
Thank you for the explanation.
Just one more clarification.
If i am using multipoint sub interfaces with frame-relay interface-dlci command
and rely on on INV ARP. Now if i disable inv arp on the main interface
would it be disabling on the multipoint sub interface also ?
So modifying ur example,
interface Serial0/0
encapsulation frame-relay
no frame inv ------------> new addition
!
interface Serial0/0.1 multipoint
ip address 10.0.0.1 255.0.0.0
frame-relay interface-dlci 102
Will it disable the inv arp on the sub interface also... Or
still the multipoint sub interface will learn inv arp since has not
particularly disabled on this interface
Thanks
Regards
Cert
On Tue, 12 Oct 2004 15:56:09 -0400, Brian McGahan
<bmcgahan@internetworkexpert.com> wrote:
> Yes, you can use the "frame-relay interface-dlci" command under
> a multipoint subinterface to assign the circuit, and then allow
> inverse-arp to resolve the layer 3 to layer 2 address. The problem in
> your configuration is that you have disabled frame relay inverse-arp
> with the "no frame-relay inverse-arp" command. Take the following
> configuration:
>
> R1#
> interface Serial0/0
> encapsulation frame-relay
> !
> interface Serial0/0.1 multipoint
> ip address 10.0.0.1 255.0.0.0
> frame-relay interface-dlci 102
>
> R2#
> interface Serial0/0
> encapsulation frame-relay
> !
> interface Serial0/0.1 multipoint
> ip address 10.0.0.2 255.0.0.0
> frame-relay interface-dlci 201
>
> Note that there are no static mappings configured, however
> inverse-arp has not been disabled on the multipoint subinterfaces.
> Therefore, output from the "show frame-relay map" command will show that
> dynamic resolution has occurred through frame relay inverse-arp:
>
> R1#show frame-relay map
> Serial0/0.1 (up): ip 10.0.0.2 dlci 102(0x66,0x1860), dynamic,
> broadcast,, status defined, active
>
> R2#show frame-relay map
> Serial0/0.1 (up): ip 10.0.0.1 dlci 201(0xC9,0x3090), dynamic,
> broadcast,, status defined, active
>
> R1#ping 10.0.0.2
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 4/6/8 ms
>
> HTH,
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
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>
>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > Jongsoo.Kim@Intelsat.com
> > Sent: Tuesday, October 12, 2004 2:30 PM
> > To: network.cisco@gmail.com; ccielab@groupstudy.com
> > Subject: RE: Frame-relay interface-dlci and Inv ARP
> >
> > Under multipoint sub interface, frame-rlay interface-dlci doesn't do
> > mapping
> > between L2 and L3.
> > You must do "frame-relay map command" under multipoint sub interface.(
> you
> > don't need point-to-point)
> > But "frame-relay interface-dlci" needs under multipoint sub interface
> > if you want to enter some configuration to a specific DLCI such as
> FRTS
> > map
> > class, VoFR, etc.
> >
> > "Show Frame-relay map" will tell you what's going on.
> > With frame-relay inverse-arp, it will work dynamically without any
> > additional config but with no frame-relay inverse-arp, you have to add
> > statically by using frame-relay map command
> >
> > Regards
> >
> > Jongsoo
> >
> >
> > -----Original Message-----
> > From: Cisco Net [mailto:network.cisco@gmail.com]
> > Sent: Monday, 11 October, 2004 8:28 PM
> > To: Group Study
> > Subject: Frame-relay interface-dlci and Inv ARP
> >
> >
> > Hi
> > One basic question,
> > When i enable interface-dlci command on a main interface or
> > on a multipoint sub interface, do i need to enabel INV ARP.
> >
> > In my case it did not work fine and i am assuming that "frame-rlay
> > interface-dlci" is expecting some kind of mapping with staic or
> > dynamically in case of multipoint interfaces.... I just want to see
> > this is expected or not.
> >
> > R1:
> > ip address 148.1.35.3 255.255.255.0
> > encapsulation frame-relay
> > clockrate 64000
> > no arp frame-relay
> > frame-relay interface-dlci 123
> > no frame-relay inverse-arp
> >
> > R2:
> > interface Serial1/0
> > ip address 148.1.35.5 255.255.255.0
> > encapsulation frame-relay
> > no arp frame-relay
> > frame-relay interface-dlci 321
> > no frame-relay inverse-arp
> >
> > Ping between these IP add does not work.
> > Please advice
> > Thanks
> > Regards
> > Cert
> >
> >
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