3Com 86-0621-000 T3 Bandwidth Limitation, Snmp Management, 3Com-approved 20 MB Flash Memory Cards

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Supported PC Flash Memory Cards

Table 18 lists 3Com-approved vendors of the PC flash memory card.

The 20 MB flash memory card has a formatted capacity of 19.86 MB. For dual image and full dump capability, 3Com recommends using a 20 MB card used in the NETBuilder II bridge/router.

You can also purchase the blank flash memory card from 3Com:

■DPE 20 MB card is 3C6086

Table 18 3Com-approved 20 MB Flash Memory Cards

Vendor and Description	Part Number
Intel Series 2	iMC020FLSA
Intel Series 2+	iMC020FLSP
AMD Series D	AmC020DFLKA

Line Error Reporting on PathBuilder S5xx Series Switch Statistics Display

T3 Bandwidth Limitation

MBRI Ownership During Board Swapping

The PathBuilder series switch reports FSI CRCs under the path statistics. This entry reflects line errors after hardware error assisted recovery has taken place. The number of actual line errors present before hardware error assisted recovery has taken place may be much higher.

Due to a driver limitation you cannot combine two T3 paths to double the bandwidth.

Port ownership and port/path naming inconsistencies can occur as MBRI boards are swapped in and out of a NETBuilder II bridge/router chassis. Replacing an MBRI board with a non-MBRI board in the same slot requires that the NETBuilder II bridge/router be rebooted. After the bridge/router is rebooted, there are no port/path naming problems.

Multiport MBRI Module The Multiport MBRI module cannot be configured using SNMP.

SNMP Management

Token Ring+ Modules The maximum physical frame size that can be forwarded by the Token Ring+ modules with Enterprise OS software is 4,500 bytes. This software limitation affects routing, source route bridging, and transparent bridging.

Token Ring Auto The Token Ring and Token Ring+ modules may enter the ring at the wrong speed Start-upwith certain MAU or station configurations. You can manually configure the -PATH

BAud value to 16,000 or 4,000 to avoid this situation.