| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1869.1 | Not what you want to hear. | CGOS01::DMARLOWE | Have you been HUBbed lately? | Wed Jan 11 1995 10:18 | 46 |
|
> 1 - Is the PE Switch able to filter IP multicast adresses so that it will
> switch only one of them to each Ethernet ?
No. It is a MAC layer device only.
> 2 - How can the PE switch be setup to do that ? Is it possible for the Multia
> user to select the film i.e. the multicast address to be transferred to
> the screen ?
If each Multia has a different MAC address, which it should, then
trasferring to a hardware address will work.
> 3 -If this is not a standard feature of the PE switch, is there any possiblity
> to change the PE switch internal code and re-engineer it to support
> this functionality ?
The DECswitch 900EF will support routing in about 6 months as an add on
to the present switching (bridging).
> 4 - If multicast is supported, is it compliant to RFC 1112/1188/1390 ? If the
> PE switch does not handle multicast, do you see any other alternative ?
DECNIS or third party.
> 5 - For an other part of the customer RFP, question is : can the PE sitch
> filtering parameters be modified from an application ?
The application would have to transfer parameters to an SNMP management
application which would in turn do the changes.
> 6 - Do you know if the PE switch will evolve to include more filtering/routing
> features ? Which ones and when ?
Don't think routing will ever be added to the PEswitch. This is
supposed to be a low cost device.
> 7 - Can the DECswitch filter not only the multicast address but also on the IP
> port address ?
Normally multicast addresses go everywhere. However you can set MAC
layer filters on ports but depending on the addressing you may cutoff
nodes.
dave
|
| 1869.2 | Trying to better understand... | ANNECY::AEO369::RENAUDEAU | | Wed Jan 11 1995 11:06 | 29 |
| Thanks for your answer, Dave. I'm not sure I understand your reply, let me try
to better understand what you mean...
1) As an example, the IP multicast address 224.255.0.2 maps to the FDDI group
address 01-00-5E-7F-00-02; when bit-reversed for transmission in the FDDI
destination MAC address field it becomes 80-00-7A-FE-00-40 which is sent
over the ring.
The PE-Switch receives frames with this MAC dest. add; if properly set-up
through SNMP commands, is the PES able to send this frame to Ethernet ports
2-5-6 ? This requires that the PE switch translates/sends several copies of
the same FDDI frame to Eth.ports 2-5-6.
2) To set-up the PES to do the above, the Multia application will have to
transfer parameters to an SNMP management application which would in turn
modify the PES parameters accordingly. Is it right ? Is it possible to have
several Multias running both applications doing this to ask 1 PES to switch
the 80-00-7A-FE-00-40 to their own Ethernet port ?
3) Filtering on multicast + port
>>> Normally multicast addresses go everywhere. However you can set MAC
>>> layer filters on ports but depending on the addressing you may cutoff
>>> nodes.
Can the MAC layer filters be set on ports on the PES and DECSwitch ?
What do you mean by "cutoff nodes" ?
Herv�.
|
| 1869.3 | Some more answers | NETCAD::KRISHNA | | Wed Jan 11 1995 18:58 | 60 |
| Hi,
Let me try and answer some of your questions...
>> 1) As an example, the IP multicast address 224.255.0.2 maps to the
>> FDDI group
>> address 01-00-5E-7F-00-02; when bit-reversed for transmission in the
>> FDDI
>> destination MAC address field it becomes 80-00-7A-FE-00-40 which is
>> sent over the ring.
>> The PE-Switch receives frames with this MAC dest. add; if properly
>> set-up
>> through SNMP commands, is the PES able to send this frame to
>> Ethernet ports
>> 2-5-6 ? This requires that the PE switch translates/sends several
>> copies of
>> the same FDDI frame to Eth.ports 2-5-6.
Normally when the PES receives a multicast frame it is flooded to all
the other ports. It is possible to set a filter on a multicast address
that restricts the port set over which the frame would be sent. Yes the
PES will translate/send several copies of the same FDDI frame to Eth.
ports 2-5-6
>> 2) To set-up the PES to do the above, the Multia application will have
>> to
>> transfer parameters to an SNMP management application which would
>> in turn
>> modify the PES parameters accordingly. Is it right ? Is it possible
>> to have
>> several Multias running both applications doing this to ask 1 PES
>> to switch
>> the 80-00-7A-FE-00-40 to their own Ethernet port ?
Basically to set up a filter on the PES you have to send an SNMp set
command to add the multicast address filter. You can either build
the SNMP command within your own application or use another application
to do the set. If you have multiple applications accessing the same
PES and setting the filter for the same multicast address, then you
can easily come up with race conditions where one application could
overwrite the filter set by another.
>> 3) Filtering on multicast + port
>> >>> Normally multicast addresses go everywhere. However you can
>> set MAC
>> >>> layer filters on ports but depending on the addressing you may
>> cutoff
>> >>> nodes.
>> Can the MAC layer filters be set on ports on the PES and
>> DECSwitch ?
>> What do you mean by "cutoff nodes" ?
I don't understand what you mean by setting mac layer filters on
ports. In the PES we allow you to set filter on addresses, where you
can specify on which ports you want to allow these addresses on and on
which ports you want to filter them.
Hope this helps,
Krishna
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