From: Rodgers Moore (rodgers@xxxxxxxxxxxxxx)
Date: Tue Dec 11 2001 - 18:39:15 GMT-3
Engaged mouth before brain... I wish I still had some of my old docs, somebody
does do it this way... Of course there was Micom that ignored the priority al
l together.
Rodgers Moore
Mas Kato wrote:
> <The only problem with 0 is this means that it cannot be the root bridge or c
onsidered in choosing a root bridge>
>
> Interesting. In every implementation I've dealt with, a bridge with a priorit
y of zero indeed becomes the root bridge and only another bridge with a priorit
y of zero and a lower bridge ID (MAC) can become root over it. I've recently ve
rified this with CatOS and HP ProCurve.
>
> The Cisco discussion of the "Root Guard" feature explicitly mentions the zero
value and its effect, at least on CatOS: http://www.cisco.com/warp/customer/4
73/74.html.
>
> Since the 802.1D standard isn't explicit about zero (just "lower" numbers mea
n higher root priority), I'd be interested to know what implementations take pr
iority zero as a special case so I can file it away as a 'caveat.'
>
> Regards,
>
> Mas Kato
> https://ecardfile.com/id/mkato
>
> >Date: Mon, 10 Dec 2001 22:53:02 -0500
> > Rodgers Moore <rodgers@the-moores.org>Reply-To: rodgers@the-moores.org
> > Liu Jianxin-qch1927 <Jianxin.Liu@invisix.com> Re: Root Bridge
> >The only problem with 0 is this means that it cannot be the root bridge or
> >considered in choosing a root bridge. 1 is the lowest value and highest
> >priority for a device to be root.
> >
> >Rodgers Moore, CCIE# 8153
> >
> >Liu Jianxin-qch1927 wrote:
> >
> >> Yesterday somebody mentioned the 1 is the lowest value.
> >>
> >> But I check the CD, the range is from 0 to 65535.
> >>
> >> set spantree priority 0 should be the right answer.
> >>
> >> -----Original Message-----
> >> From: Albert Lu [mailto:albert_ccie@yahoo.com]
> >> Sent: Sunday, December 09, 2001 6:46 PM
> >> To: 'Mas Kato'
> >> Cc: ccielab@groupstudy.com
> >> Subject: RE: Root Bridge
> >>
> >> So what does setting the port priority to 8192 do? Isn't that the magic
> >> number?
> >>
> >> -----Original Message-----
> >> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> >> Mas Kato
> >> Sent: Sunday, December 09, 2001 7:11 PM
> >> To: ccielab@groupstudy.com; c_ccie@hotmail.com
> >> Subject: RE: Root Bridge
> >>
> >> [demime could not interpret encoding binary - treating as plain text]
> >> To assure it, use the 'set spantree priority 0' command.
> >>
> >> Regards,
> >>
> >> Mas Kato
> >> https://ecardfile.com.id/mkato
> >>
> >> > "CCIE Cisco" <c_ccie@hotmail.com> ccielab@groupstudy.com Root BridgeDate
:
> >> Sat, 08 Dec 2001 22:00:48 -0500
> >> >Reply-To: "CCIE Cisco" <c_ccie@hotmail.com>
> >> >
> >> >Hi,
> >> >
> >> >what is the command to make Catalyst5000 as root bridge without using
> >> >spantree root command.
> >> >
> >> >Thanks
> >> >
> >> >
> >> >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:32:42 GMT-3