From: Amit Jain (netsteps@rediffmail.com)
Date: Fri Jul 08 2005 - 01:27:39 GMT-3
Scott
This question is in referance to a lab requirement where you only want a
certain type of traffic like SNA or Netbios to be passed between DLSW peers.
The link sent by Sila Moni http://www.cisco.com/warp/public/698/acl200.html
is useful but I dont think it would be accessible from lab as the article is
not specifically under DocCD domain. So I guess I have to memorize the most
common codes. :-)
Amit Jain
----- Original Message -----
From: "Scott Morris" <swm@emanon.com>
To: "'Amit Jain'" <netsteps@rediffmail.com>; "'Schulz, Dave'"
<DSchulz@dpsciences.com>; "'Group Study'" <ccielab@groupstudy.com>
Sent: Friday, July 08, 2005 8:08 AM
Subject: RE: protocol type-code information on DocCD
> It's a stretch...
>
> First, per the DocCD:
> "Usage Guidelines
>
> Type-code access lists can have negatively affect system performance;
> therefore, keep the lists as short as possible and use wildcard bit masks
> whenever possible.
>
> Access lists are evaluated according to the following algorithm:
>
> .If the packet is Ethernet Type II or SNAP, the type-code field is used.
>
> .If the packet is another type, then the LSAP is used."
>
> So with a valuer of 80D5, I can tell you right away that's not a SAP code.
> It's an ethertype code. I haven't got a clue of the context of the lab,
but
> ethertype code 0x80D5 is used to indicate IBM/SNA traffic (NOTE: NOT
> specifically DLSW, but native SNA) within a SNAP type ethernet header. I
> haven't found a great reference of ethertypes on the DocCD other than
random
> ones in different places.
>
> If you want more esoteric things to look up like that, check out:
>
> http://www.netwho.com/frame/ethertype.htm
>
> HTH,
>
> Scott
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Amit
> Jain
> Sent: Thursday, July 07, 2005 1:39 PM
> To: Schulz, Dave; Group Study
> Subject: Re: protocol type-code information on DocCD
>
> Hey Dave
>
> The list no doubt looks useful, but I am still nowhere. In an IE example
we
> needed to permit SNA traffic. Answer says:
> access-list 200 permit 0x0000 0x0D0D
> but the list you mentioned says SNA type code as 80D5. What is the part of
> puzzle I am missing?
> Also I could not look for Netbios type code in list.
>
> Amit
> ----- Original Message -----
> From: "Schulz, Dave" <DSchulz@dpsciences.com>
> To: "Amit Jain" <netsteps@rediffmail.com>; "Group Study"
> <ccielab@groupstudy.com>
> Sent: Thursday, July 07, 2005 8:29 PM
> Subject: RE: protocol type-code information on DocCD
>
>
> Amit -
>
> The type codes can be found under volume 1 of 2 (Cisco IOS Bridging and
> IBM Networking Command Reference, Volume 1 of 2: Bridging, Release 12.3)
> of the configuration document CD.....
>
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/ibm_
> r1/index.htm
>
> Does this help?
>
>
> Dave Schulz
>
> Email: dschulz@dpsciences.com
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Amit Jain
> Sent: Thursday, July 07, 2005 7:42 AM
> To: Group Study
> Subject: protocol type-code information on DocCD
>
> Hi
>
> In the DLSW examples where we have to permit/deny traffic based on
> protocol
> type-code, I am have difficulty figuring out the correct type-code. Can
> somebody help me locate the same on DocCd ?
>
> Amit
>
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