From: Andrew Bratchell (a.bratchell@caeuk.com)
Date: Thu Oct 24 2002 - 07:13:41 GMT-3
Prio,
Traffic that originates on Ethernet is picked up from the local Ethernet bridge group and transported across the DLSw+ network. DLSw+ always transfers data in noncanonical format. DLSw+ will automatically make the correct MAC address conversion depending on the destination media. When DLSw+ receives a MAC address from an Ethernet-attached device, it assumes it is canonical and converts it to noncanonical format for transport to the remote peer. At the remote peer, the address is either passed unchanged to Token Ring-attached end systems or converted back to canonical format if the destination media is Ethernet.
Also be aware that when filtering with DLSw+ on Mac addresses DLSw+ works in non-canonical format (Token-Ring format). Thus, you always need to put mac addresses in this format. If you are using access-lists to specify mac output list on a DLSw+ statement, you will always use non-canonical format. If the access-list will be using to filter on a token-ring interface it will be non-canonical. If the access-list will be used to filter on an Ethernet interface it will be canonical. Make sure you know how to convert between non-cononical and canonical format. As an aid, you can use Cisco's Bitswapping tool which can be found on their web site.
Andy
-----Original Message-----
From: Prio Utomo [mailto:rionaldi@cbn.net.id]
Sent: 24 October 2002 03:29
To: ccielab@groupstudy.com
Subject: DLSW Canonical/NonCanonical
Dear All,
In dlsw configuration, do we need to be aware of canonical/non-canonical
conversion? or it is done automatically by the router in ethernet-tokenring
dlsw bridging?
Can you provide examples if it must be done manually and in what circumstance
it must be implemented? (is it in filtering or maybe peering...)
Regards,
PU
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