Subject: Additional FR PVC signaling information for DLUR

From: "Andrew S. Barclay" <[email-masked]>
Date: Fri, 21 Jul 95 14:10:09 EDT

As a result of the frame relay boundary access node (BAN) capabilities,
which were described in a tutorial at AIW 7, we have received product
requests to include BAN connections between a DLUR and a downstream
LAN-attached node.  The DLUR DLC Signaling Information TG Descriptor
Subfield formats for frame relay PVCs have already been defined in the
architecture.  All that remains to accommodate the FR BAN function is
to add a subfield containing the destination MAC address.

The specific changes I am proposing to the TG Descriptor Subfield formats
are shown below.  These proposed changes are also available in "change
page" format as:

ftp://networking.raleigh.ibm.com/pub/standards/aiw/dlur/arch8318d.psbin.

Please review and comment on this material.  I am planning to request
CP status on these changes at AIW 8.

Andy Barclay
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1. Under the heading "DLC Signaling Type (X'91') TG Descriptor Subfield"

For DLC Type of Frame-Relay Permanent Virtual Circuit (PVC):

ADD the following subfield to the current list:

            X'96' Destination MAC address (present if RFC 1490 bridged
                  802.5 frame format is used) Note: The frame-relay
                  Boundary Access Node (BAN) function uses this RFC 1490
                  format.

2. Under the heading "DLC Signaling Information (X'96') TG Descriptor Subfield"

ADD:

For DLC Type = FRPVC:

2-7(=n)     Destination MAC address
            Note: The MAC address here is encoded in noncanonical format.

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