From: Sean.Zimmerman@clubcorp.com
Date: Tue Apr 24 2007 - 10:59:31 ART
I used wireshark to capture a MSTP BPDU, and it appears to have the same
DSAP and SSAP as a regular STP BPDU. It uses an STP version number 3 to
signify mst.
Here's the output of the capture:
IEEE 802.3 Ethernet
Destination: Spanning-tree-(for-bridges)_00 (01:80:c2:00:00:00)
Address: Spanning-tree-(for-bridges)_00 (01:80:c2:00:00:00)
.... ...1 .... .... .... .... = IG bit: Group address
(multicast/broadcast)
.... ..0. .... .... .... .... = LG bit: Globally unique address
(factory default)
Source: Cisco_f5:a1:c4 (00:0f:8f:f5:a1:c4)
Address: Cisco_f5:a1:c4 (00:0f:8f:f5:a1:c4)
.... ...0 .... .... .... .... = IG bit: Individual address
(unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address
(factory default)
Length: 106
Logical-Link Control
DSAP: Spanning Tree BPDU (0x42)
IG Bit: Individual
SSAP: Spanning Tree BPDU (0x42)
CR Bit: Command
Control field: U, func=UI (0x03)
000. 00.. = Command: Unnumbered Information (0x00)
.... ..11 = Frame type: Unnumbered frame (0x03)
Spanning Tree Protocol
Protocol Identifier: Spanning Tree Protocol (0x0000)
Protocol Version Identifier: Multiple Spanning Tree (3)
BPDU Type: Rapid/Multiple Spanning Tree (0x02)
BPDU flags: 0x3c (Forwarding, Learning, Port Role: Designated)
0... .... = Topology Change Acknowledgment: No
.0.. .... = Agreement: No
..1. .... = Forwarding: Yes
...1 .... = Learning: Yes
.... 11.. = Port Role: Designated (3)
.... ..0. = Proposal: No
.... ...0 = Topology Change: No
"cisco efiko" <ciscoefiko@googlemail.com>
04/24/2007 07:00 AM
To
"Ivan Ivanov" <ivanov.ivan@gmail.com>
cc
"Jeff Mullan" <jmullan78@gmail.com>, "Sean.Zimmerman@clubcorp.com"
<Sean.Zimmerman@clubcorp.com>, "Cisco certification"
<ccielab@groupstudy.com>, dampened <cheechew@hotmail.com>, "Henk de Tombe"
<henk.de.Tombe@qi.nl>, nobody@groupstudy.com
Subject
Re: L2 Ethertype mac acl
Ivan,
Thanks for the link, but it's still the same with all the links sent.
arp = 0x806 0x0
pvst+ = 0xAAAA 0x0
pvst = 0x4343 0x0
stp = 0x4242 0x0
mst = ?
I.e, these links have the ARP value 0x806, but not the others, except too
much study is clouding my sight?!
On 4/24/07, Ivan Ivanov <ivanov.ivan@gmail.com> wrote:
Hello,
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3900/c3930ug/codes.htm
Maybe this will help
HTH
On 4/24/07, cisco efiko <ciscoefiko@googlemail.com> wrote:
> Hi,
>
> I did ask this before sometime, the list on the CCO link you have
provided
> is not complete. Is there another way to find out these Ethertype
values?
>
>
> On 4/23/07, Jeff Mullan <jmullan78@gmail.com> wrote:
> >
> > Thanks buddy !!!
> >
> > On 4/23/07, Sean.Zimmerman@clubcorp.com <Sean.Zimmerman@clubcorp.com >
> > wrote:
> > >
> > >
> > > Ethertype codes (under IOS bridging command reference):
> > >
> > >
> >
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hbr_r/br_aph.htm
> > >
> > >
> > >
> > >
> > > *"Jeff Mullan" < jmullan78@gmail.com>*
> > > Sent by: nobody@groupstudy.com
> > >
> > > 04/23/2007 04:31 PM Please respond to
> > > "Jeff Mullan" < jmullan78@gmail.com>
> > >
> > > To
> > > "Henk de Tombe" <henk.de.Tombe@qi.nl> cc
> > > dampened <cheechew@hotmail.com>, "Cisco certification" <
> > > ccielab@groupstudy.com > Subject
> > > Re: L2 Ethertype mac acl
> > >
> > >
> > >
> > >
> > > Is this some thing on the Doc CD we can refer to during the exam ?
> > >
> > > On 4/23/07, Henk de Tombe <henk.de.Tombe@qi.nl> wrote:
> > > >
> > > > Hi,
> > > >
> > > > LLC assignments:
> > > > http://standards.ieee.org/regauth/llc/llcassignments.pdf
> > > >
> > > > Ethertype assignments:
> > > > http://www.iana.org/assignments/ethernet-numbers
> > > >
> > > > regards,
> > > > Henk
> > > >
> > > >
> > > > -----Oorspronkelijk bericht-----
> > > > Van: nobody@groupstudy.com [mailto:nobody@groupstudy.com ] Namens
> > > > dampened
> > > > Verzonden: maandag 23 april 2007 12:55
> > > > Aan: Cisco certification
> > > > Onderwerp: L2 Ethertype mac acl
> > > >
> > > > Could someone comment the accuracy of my compilation?
> > > >
> > > > arp = 0x806 0x0
> > > > pvst+ = 0xAAAA 0x0
> > > > pvst = 0x4343 0x0
> > > > stp = 0x4242 0x0
> > > > mst = ?
> > > >
> > > > Does anyone know what value should be used for MST?
> > > > Where can I get all this information from DocCD? The one that on
the
> > > > Bridging Command appendix is not complete.
> > > >
> > > >
> >
This archive was generated by hypermail 2.1.4 : Tue May 01 2007 - 08:28:37 ART