3Com 3C63400-3AC-C - PathBuilder S700 Switch, Справочное руководство

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78 C
HAPTER
4: P
ATH
B
UILDER
S700 M
ODULE AND
A
PPLICATION
O
VERVIEW
SNMP MIB Standards Support
Table 25 lists the standards that are supported for the MIBs.
STX Module The STX module provides a switching matrix that supports sophisticated traffic
management, priority queuing, and multicasting. It performs all functions
necessary for concentrating and switching ATM cells according to the set priority
given to its Class of Service traffic types:
n
Provides any-to-any switching based on VC address
n
Supports virtual interfaces (VIs)—logical UNI ports
n
Slots 5 and 6 support up to 15 VIs each.
n
For slots 7-18, each bus supports three slots (7-9, 10-12, 13-15, and 16-18),
and the PathBuilder S700 supports up to 24 VIs for each bus. As the VIs are
assigned, the software automatically allocates them among the slots. In
other words, all 24 VIs on a particular bus could be allocated to a single slot.
n
Supports Deep buffers (8,000 cells per VI) for queuing to support 4 Classes of
Services per VI
n
Provides priority queuing in which each VC can be assigned to a specific VI
which then can be allocated to one of 4 queues for CBR, VBR-rt, VBR-nrt, and
UBR classes of service.
n
Supports per VC traffic policing
n
Supports multicasting (up to 256 connections with 32 leaves)
n
Supports per VC statistics
n
Allows a total of 4,000 two-way connections maximum per PathBuilder S700
n
Generates the backplane timing 8KHZ clock and generates ATM bus timing
n
Accepts an 8kHZ signal from all modules together with a 1.544MHz external
BITS Clock
n
Performs all address translation functions
Table 25 Supported MIBs
Document Name Description
RFC 1213 MIB II
RFC 1406 DS1/E1 MIB
RFC 1407 DS3/E3 MIB
RFC 1493 Bridge MIB (previously RFC 1286)
RFC 1595 SONET MIB
RFC 1643 Ethernet MIB
AF-PHY-0086.000.mib ATM Forum Compliant IMA MIB