From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Mon Jun 12 2006 - 11:57:45 ART
IP is a layer 3 protocol independent of the layer 2 transport.
Ethernet uses MAC addresses for layer 2 addressing, while Frame Relay
uses DLCIs. When the Frame Relay cloud receives a IP packet
encapsulated inside a Frame Relay header it simply looks at the incoming
DLCI and switches the packet based on the outgoing DLCI in its mapping
table. The same behavior occurs if the payload is IPX, IPv6, etc.
The subinterfaces and layer 3 to layer 2 resolution methods used
on the DTE devices (routers) don't have any affect on the operation of
the Frame Relay cloud or switches. When the Frame Relay switches
receive the traffic it is simply a Frame Relay encapsulated frame.
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
> chris Iannacone
> Sent: Monday, June 12, 2006 9:10 AM
> To: ccielab@groupstudy.com
> Subject: fame-relay
>
> I was doing a lab in which one side was a point-to-point frame relay
> sub interface is on one side and an ip address is used on the other.
> what exactly does the exchange between the router and frame relay
> switch look like - starting from frame map ip ? the frame relay
> switch operates on layer 2 but the layer 2 of IP is MAC so what does
> the switch see? does anyone have a FSM of the exchange including
> exceptions and resoultions
>
>
This archive was generated by hypermail 2.1.4 : Sat Jul 01 2006 - 07:57:32 ART