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- Newsgroups: comp.dcom.sys.cisco
- Path: sparky!uunet!boulder!recnews
- From: vsg%tron!plaza.dnet@uunet.UU.NET (Marty Adkins, (W) ESG Distributed Systems, MS 1615, WIN 285-1479)
- Subject: MEC 2.4 microcode
- Message-ID: <721458642.6010@news.Colorado.EDU>
- Sender: news
- Date: 5 Nov 1992 19:37:15 -0500
- Approved: news
- X-Note1: mail msgid was <9211060407.AA06191@relay1.UU.NET>
- X-Note2: message-id generated by recnews
- Lines: 47
-
- >Article 2839 of comp.dcom.sys.cisco:
- >Path: tron!uunet!uunet!nntp1.radiomail.net!csl.sri.com!cisco.com!tsiang
- >From: tsiang@cisco.com (David Tsiang)
- >Newsgroups: comp.dcom.sys.cisco
- >Subject: Re: Weird Ethernet Behavior
- >Date: 7 Oct 1992 23:27:37 GMT
- >Organization: cisco Systems, Incorporated
- >Lines: 66
- >Distribution: world
- >Message-ID: <1avrp9INNgp@roche.csl.sri.com>
- >References: <BvF94p.9CA@usenet.ucs.indiana.edu> <1aee3aINNfgk@early-bird.think.com> <BvG405.Jp0@usenet.ucs.indiana.edu> <1ahhtcINNma4@moe.ksu.ksu.edu>
- >NNTP-Posting-Host: tsiang-ss2.cisco.com
- >
- >
- >--
- >
- >What interface cards are you using? I know that for the MEC (an AGS+ card) there is
- >a small window where the interface chip will not automatically flush bad CRC'd
- >packets like it should. This only seems to occur on 'bad' networks and seems
- >to occur most often when fiber repeaters are involved. The good news is that
- >although the interface chip does not flush the packet, it does mark the CRC bad
- >status bit. With the latest and greatest MEC microcode (Ver 2.4), we no longer
- >rely on the interface chip to flush a packet and we do an explicit check of
- >the CRC status bit.
- >
- >So if you have an MEC and are seeing this problem, I would upgrade the microcode
- >to Ver 2.4.
- >
- >
- >
- >David Tsiang
- >High End Systems Development
- >cisco Systems - HW engineering
- >Menlo Park, California
- >email: tsiang@cisco.com
-
- David,
-
- CIO still has no mention of MEC 2.4 yet so I'm going to the source.
- Is there an equivalent version for the older MEC rev 5.0 boards -- i.e, V1.8?
- Does V2.4 have any other prequisites beyond what V2.3 requires (e.g., CCTL)?
-
- Thank you,
- Marty Adkins
- Distributed Systems
- Westinghouse Electronic Systems Group
- Internet: Adkins@plaza.wec.com
-