RFC 2115 (rfc2115) - Page 3 of 32
Management Information Base for Frame Relay DTEs Using SMIv2
Alternative Format: Original Text Document
RFC 2115 Frame Relay DTE MIB September 1997
Should the user wish to group DLCs together to associate them with a
higher layer, or to associate a DLC with an unnumbered point-to-point
service, the frame relay DTE MIB provides an entry in the
frCircuitEntry record. For example, suppose one were to configure a
company proprietary protocol to run above several of the frame relay
VCs. The basic layering would look something like the following:
IP (ipaddrEntry 1 ) IP (ipaddrEntry 2) IP (ipaddrEntry 3)
| | |
| | |
| | proprietary protocol
| | layer (ifIndex 3)
| | |
| | |
DLCI 20 DLCI 30 DLCI 40/41/42
(ifIndex 2) (ifIndex 2) (ifIndex 2,
logical ifIndex 3)
| | |
| | |
|____________________|_____________________|
|
|
FR DLMCI (ifIndex.2)
|
|
Physical Interface (ifIndex.1)
A configuration which specified that DLCI 40, 41,and 42 were associated
with a proprietary protocol layer, while DLCI 20 and 30 were to run IP
directly can now be expressed using a combination of frCircuitIfIndex
and frCircuitLogicalIfIndex. In this particular case DLCIs 40, 41 and
42 would use frCircuitIfIndex equal to the frame relay interface level
(2) while their frCircuitLogicalIfIndex would indicate the proprietary
protocol (3). DLCIs 20 and 30 would have both instances set to the frame
relay interface (2).
Object Meaning for Frame Relay Interface
______ _____________________________________
ifDescr As per DESCRIPTION in RFC 1573.
ifType The value allocated for Frame Relay
Interfaces - frameRelay (32).
ifMtu Set to maximum frame size in octets for
this frame relay interface.
Brown & Baker Standards Track