once again, many thx Priscilla - thats great. -----Original Message----- From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]] Sent: 01 January 2003 21:05 To: [EMAIL PROTECTED] Subject: RE: Ethernet Frame Types. [7:60071]
[EMAIL PROTECTED] wrote: > > Hello again, > > Is it possible to run any other encapsulation of Ethernet on a > Cisco > interface other than ARPA (Ethernet_II). With IPX, it is possible to change the Ethernet frame type. IPX supports four different frame types. Check this out: Albany(config)#int e0 Albany(config-if)#ipx network 400 encapsulation ? arpa Novell Ethernet_II hdlc HDLC on serial links novell-ether Novell Ethernet_802.3 sap IEEE 802.2 on Ethernet, FDDI, Token Ring snap IEEE 802.2 SNAP on Ethernet, Token Ring, and FDDI AppleTalk Ph. 2 doesn't use Ethernet II either, but it's not configurable. It uses 802.3 with 802.2 and SNAP. A few other protocols automatically don't use Ethernet II either, such as CDP, BPDU, NetBEUI, and IS-IS. Of course, if you're using VLANs, you can change the Ethernet encapsulation to 802.1q or ISL, but the "real" Ethernet frame is still Ethernet II if you're using IP. If your concern is IP, then 99.999999% of IP implementations use Ethernet II. Cisco always defaults to that. If, however, a Cisco router sees a data stream from a host where IP uses 802.3 with 802.2, the router can handle this. In order to make it work, you need to use the obscure "arp snap" command. So, although you can't configure IP to use anything other than Ethernet II, you can configure ARP to use SNAP for that 0.0000001% of cases where a host is doing IP on top of 802.3 with 802.2. You might enjoy my Ethernet lab scenario here: http://www.troubleshootingnetworks.com/ethernet.html Priscilla > > Many thx > > > ------------------------------------------------------------------------ > For more information about Barclays Capital, please > visit our web site at http://www.barcap.com. > > > Internet communications are not secure and therefore the > Barclays > Group does not accept legal responsibility for the contents of > this > message. Although the Barclays Group operates anti-virus > programmes, > it does not accept responsibility for any damage whatsoever > that is > caused by viruses being passed. Any views or opinions > presented are > solely those of the author and do not necessarily represent > those of the > Barclays Group. Replies to this email may be monitored by the > Barclays > Group for operational or business reasons. > > ------------------------------------------------------------------------ Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=60078&t=60071 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
