Re: Doubt on 802.1w (max age)
"Mick Seaman" <[email protected]> Fri, 19 Jan 2007 09:14:56 -0800
| Newsgroups | gmane.ietf.bridge |
|---|---|
| Message-ID | <00b901c73bed$58526030$6401a8c0@MICKHPDESK> |
This is a multi-part message in MIME format. --===============1912512471== Content-Type: multipart/alternative; boundary="----=_NextPart_000_00B6_01C73BAA.495D5140" This is a multi-part message in MIME format. ------=_NextPart_000_00B6_01C73BAA.495D5140 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable What I think about it is that you have Max Age set too low - I would = suggest at least 8 in this scenario. The disputed procedure (I hope the = code is to 1D-2004 with the two late editorial errors fixed as per the = Vision sim release notes, alternately see 1Q-2005MSTP code which has = these fixes) will stop there being a loop. Mick ----- Original Message -----=20 From: [email protected]=20 To: [email protected] ; [email protected] ; = [email protected] ; [email protected]=20 Sent: Friday, January 19, 2007 1:10 AM Subject: Doubt on 802.1w (max age) Hi, Setup: 6 manageable switches are connected in linear fashion with root = brdige at top . In the root bridge ,max-age ,hellotime and forward-delay is configured as 6 ,1 and 4 . Issue : In the sixth bridge ,learned value of max-age,hello time and = forward delay is found as 6 ,1 and 4.But the role of the port connected to switch 6 alone is switching between F/R (Root) and F/D (Designated ) We r using the source forge rstp source code for all 6 switches From 802.1w standard,I calculated the rcvdinfowhile timer value = for the port connected to sixth switch as 1 (Calculation done from updtRcvdInfoWhile()) .When port of switch 6 recieves BPDU for every hello time (1 sec) port role switches to F/R and on expiry of rcvdInfoWhile timer expiry ( 1 sec ) port role switches to F/D . What do you think about it ? ------=_NextPart_000_00B6_01C73BAA.495D5140 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.5730.11" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>What I think about it is that you have = Max Age set=20 too low - I would suggest at least 8 in this scenario. The disputed = procedure (I=20 hope the code is to 1D-2004 with the two late editorial errors fixed as = per the=20 Vision sim release notes, alternately see 1Q-2005MSTP code which has = these=20 fixes) will stop there being a loop.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Mick</FONT></DIV> <BLOCKQUOTE=20 style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV> <DIV=20 style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B>=20 <A [email protected]=20 href=3D"mailto:[email protected]">[email protected]</A> </DIV> <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A = [email protected]=20 href=3D"mailto:[email protected]">[email protected]</A> ; <A=20 [email protected]=20 href=3D"mailto:[email protected]">[email protected]</A> ; <A=20 [email protected]=20 = href=3D"mailto:[email protected]">[email protected]= ourceforge.net</A>=20 ; <A [email protected]=20 href=3D"mailto:[email protected]">[email protected]</A> </DIV> <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Friday, January 19, 2007 = 1:10=20 AM</DIV> <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Doubt on 802.1w (max = age)</DIV> <DIV><BR></DIV><BR>Hi,<BR><BR>Setup:<BR> 6 = manageable=20 switches are connected in linear fashion with root brdige<BR>at top . = In the=20 root bridge ,max-age ,hellotime and forward-delay = is<BR>configured as 6=20 ,1 and 4 .<BR><BR><BR>Issue :<BR> In the sixth = bridge=20 ,learned value of max-age,hello time and forward<BR>delay is found as = 6 ,1 and=20 4.But the role of the port connected to<BR>switch 6 alone is switching = between=20 F/R (Root) and F/D (Designated )<BR><BR><BR><BR> We = r using=20 the source forge rstp source code for all 6 = switches<BR> =20 From 802.1w standard,I calculated the rcvdinfowhile timer value=20 for<BR>the port connected to sixth switch as 1 (Calculation done=20 from<BR>updtRcvdInfoWhile()) .When port of switch 6 recieves = BPDU for=20 every<BR>hello time (1 sec) port role switches to F/R and on expiry=20 of<BR>rcvdInfoWhile timer expiry ( 1 sec ) port role switches to F/D=20 .<BR><BR> What do you think about it=20 ?<BR><BR><BR></BLOCKQUOTE></BODY></HTML> ------=_NextPart_000_00B6_01C73BAA.495D5140-- --===============1912512471== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Bridge-mib mailing list [email protected] https://www1.ietf.org/mailman/listinfo/bridge-mib --===============1912512471==--