RE: OEQ

From book ISBN: 1-58705-116-8

1)

Supported LMI Type
DLCI
Developing Organization

Cisco
1023
Gang of Four

ANSI Annex D
0
ANSI TI.617

Q933A Annex A
0
ITU-T (CCITT)

2)
 The other issue is with the number of DLCIs that can be configured on a
physical interface in the Cisco router. The LMI protocol specifies that all
PVC status reports have to fit into a packet. How many of these can be
squeezed into a packet depends on the maximum transmission unit (MTU) of the
physical interface. The formula for calculating the maximum number of DLCI
per physical interface is (MTU 20)/5, where MTU is in bytes. The default MTU
size of an interface on a Cisco router is 1500 bytes; the interface can have
a maximum of 296 DLCIs.
Dont know where the 20 comes from.. any idea?

Santiago E

Written by me, not breaking any NDA

  _____

De: Rene [mailto:rene.klose_at_gmail.com]
Enviado el: Miircoles, 13 de Mayo de 2009 17:31
Para: Santiago Enciso
CC: Cisco certification
Asunto: Re: OEQ

aren't dlci 0 for ANSI and ITU ?

sure i don't rally get the 2 question do you mean how many dlci updates can
be transported in a singel LMI message ?

On Wed, May 13, 2009 at 2:15 PM, Santiago Enciso <senciso_at_infocenter.com.py>
wrote:

1) What sort of information is suponed to be carried in DLCI 0 of
frame relay?
2) How many DLCIs que be informed in a single LMI message in a cisco
physical frame-relay interface?

Santiago E

Written by me, not breaking any NDA

  _____

De: Rene [mailto:rene.klose_at_gmail.com]
Enviado el: Miircoles, 13 de Mayo de 2009 16:53
Para: Santiago Enciso
CC: Cisco certification
Asunto: Re: OEQ

2) addresses between 0x0180C2000000 to 0x0180C200000F
 (17 Multicast addresses of STP to be used by different bridge protocols)
1)

Bit 2 is the protcol identifier and 3 is BPDU Type,

http://www.protocols.com/pbook/bridge.htm

On Wed, May 13, 2009 at 1:49 PM, Santiago Enciso <senciso_at_infocenter.com.py>
wrote:
1) What does bit position 2 and 3 mean in a Spanning-Tree BPDU?
2) What is the multicast mac address used as destination address in
traditional spannig tree bpdus?

Santiago E

Written by me, not breaking any NDA

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Received on Wed May 13 2009 - 17:49:02 ART