Re: ARP Table size
"Tom Collins tom-lnEA/wrDJtNWk0Htik3J/[email protected] [rabbit-semi]" <[email protected]> Mon, 25 Mar 2019 15:59:40 -0700
| Newsgroups | gmane.comp.hardware.rabbit-semiconductor |
|---|---|
| Message-ID | <[email protected]> |
--Apple-Mail=_CA20EFC1-CDC3-450E-BD40-34A3386DE341 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Steve, You might also want to take a look at this commit that I never merged into = master: https://github.com/digidotcom/DCRabbit_10/commit/2fc3a5268ee8d8656694367b66= a78463e6f1855d <https://github.com/digidotcom/DCRabbit_10/commit/2fc3a5268e= e8d8656694367b66a78463e6f1855d> I believe it addresses the issue you=E2=80=99re talking about, that the Rab= bit adds ARP entries from broadcast traffic for device that it=E2=80=99s ne= ver going to communicate with. It was a significant change that I can=E2= =80=99t thoroughly test, so it never made it into a release. You could test it on the RCM6750, and if it works well, back port it to Dyn= amic C 9 for your R3k modules. -Tom > On Mar 20, 2019, at 7:46 AM, seecwriter-/[email protected] [rabbit-semi] <rabbit-s= [email protected]> wrote: >=20 > The reason I increased the ARP table is because of the way the R3k module= s work. Every device on the network that they see, they add to the ARP tabl= e, printers, computers, oscilloscopes, mobile phones, etc. Even though the = module will never communicate with any of them. So what happens is, when th= e table is full, the next addition bumps the oldest one off the table. Even= tually, the device the module is communicating with get pushed off the ARP = table. The TCP connection is lost and the host has to reconnect to re-estab= lish communication. Many a customer has complained about this, so I increas= ed the ARP table to 20, then 64, and now to 128. I've had no complaints ab= out this with the R6k modules, but then there are many many more R3k module= s fielded than R6k. But just in case, I increased the table to 128 on the R= k6 module. >=20 >=20 --Apple-Mail=_CA20EFC1-CDC3-450E-BD40-34A3386DE341 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/htm= l4/strict.dtd"> <html> <head> </head> =20 <body style=3D"background-color: #fff;"> <span style=3D"display:none"> </span> <!--~-|**|PrettyHtmlStartT|**|-~--> <div id=3D"ygrp-mlmsg" style=3D"position:relative;"> <div id=3D"ygrp-msg" style=3D"z-index: 1;"> <!--~-|**|PrettyHtmlEndT|**|-~--> <div id=3D"ygrp-text" > =20=20=20=20=20=20 =20=20=20=20=20=20 <p>Steve,<div class><br class></div><div class>You might also want to= take a look at this commit that I never merged into master:</div><div clas= s><br class></div><div class><a href=3D"https://github.com/digidotcom/DCRab= bit_10/commit/2fc3a5268ee8d8656694367b66a78463e6f1855d" class>https://githu= b.com/digidotcom/DCRabbit_10/commit/2fc3a5268ee8d8656694367b66a78463e6f1855= d</a></div><div class><br class></div><div class>I believe it addresses the= issue you=E2=80=99re talking about, that the Rabbit adds ARP entries from = broadcast traffic for device that it=E2=80=99s never going to communicate w= ith. It was a significant change that I can=E2=80=99t thoroughly test= , so it never made it into a release.</div><div class><br class></div><div = class>You could test it on the RCM6750, and if it works well, back port it = to Dynamic C 9 for your R3k modules.</div><div class><br class><div class> <span class=3D"Apple-style-span" style=3D"border-collapse: separate;"><div = class>-Tom</div><br class=3D"Apple-interchange-newline"></span> </div> <div><br class><blockquote type=3D"cite" class><div class>On Mar 20, 2019, = at 7:46 AM, <a href=3D"mailto:seecwriter-/[email protected]" class>seecwriter@yahoo.= com</a> [rabbit-semi] <<a href=3D"mailto:[email protected]" cl= ass>[email protected]</a>> wrote:</div><br class=3D"Apple-inte= rchange-newline"><div class><p style=3D"margin: 0px 0px 1em;font-family: Ge= orgia;font-size: 13px;font-style: normal;font-weight: normal;letter-spacing= : normal;text-align: start;text-indent: 0px;text-transform: none;white-spac= e: normal;" class><span class>The reason I increased the ARP table is becau= se of the way the R3k modules work. Every device on the network that they s= ee, they add to the ARP table, printers, computers, oscilloscopes, mobile p= hones, etc. Even though the module will never communicate with any of = them. So what happens is, when the table is full, the next addition bumps t= he oldest one off the table. Eventually, the device the module is communica= ting with get pushed off the ARP table. The TCP connection is lost and the = host has to reconnect to re-establish communication. Many a customer has co= mplained about this, so I increased the ARP table to 20, then 64, and now t= o 128. I've had no complaints about this with the R6k modules, but th= en there are many many more R3k modules fielded than R6k. But just in case,= I increased the table to 128 on the Rk6 module.</span></p><= br class=3D"Apple-interchange-newline"></div></blockquote></div><br class><= /div></p> </div> =20=20=20=20=20 <!--~-|**|PrettyHtmlStart|**|-~--> <div style=3D"color: #fff; height: 0;">__._,_.___</div> =20=20=20=20=20=20=20=20=20=20 =20=20 =20 =20=20=20=20 <div style=3D"clear:both"> </div> <div id=3D"fromDMARC" style=3D"margin-top: 10px;"> <hr style=3D"height:2px ; border-width:0; color:#E3E3E3; background= -color:#E3E3E3;"> Posted by: Tom Collins <tom-lnEA/wrDJtNWk0Htik3J/[email protected]> <hr style=3D= "height:2px ; border-width:0; color:#E3E3E3; background-color:#E3E3E3;"> </div> <div style=3D"clear:both"> </div> <table cellspacing=3D4px style=3D"margin-top: 10px; margin-bottom: 10px= ; color: #2D50FD;"> <tbody> <tr> <td style=3D"font-size: 12px; font-family: arial; font-weight: bo= ld; padding: 7px 5px 5px;" > <a style=3D"text-decoration: none; color: #2D50FD= " href=3D"https://groups.yahoo.com/neo/groups/rabbit-semi/conversations/mes= sages/42520;_ylc=3DX3oDMTJxZzdvaHFnBF9TAzk3MzU5NzE0BGdycElkAzIzMDczMTYEZ3Jw= c3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzQyNTIwBHNlYwNmdHIEc2xrA3JwbHkEc3RpbWUDMTU1MzU= 1NDc5Mg--?act=3Dreply&messageNum=3D42520">Reply via web post</a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;" > <a href=3D"mailto:tom-lnEA/wrDJtNWk0Htik3J/[email protected]?subject=3DRe%3A%20%5Brabbit-= semi%5D%20ARP%20Table%20size" style=3D"text-decoration: none; color: #2D50F= D;"> Reply to sender </a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;"> <a href=3D"mailto:[email protected]?subject=3DRe%3A%2= 0%5Brabbit-semi%5D%20ARP%20Table%20size" style=3D"text-decoration: none; co= lor: #2D50FD"> Reply to group </a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;" > <a href=3D"https://groups.yahoo.com/neo/groups/rabbit-semi/conv= ersations/newtopic;_ylc=3DX3oDMTJlM2w1NmNwBF9TAzk3MzU5NzE0BGdycElkAzIzMDczM= TYEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA250cGMEc3RpbWUDMTU1MzU1NDc5Mg--= " style=3D"text-decoration: none; color: #2D50FD">Start a New Topic</a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;color: #2D50FD;" > <a href=3D"https://groups.yahoo.com/neo/groups/= rabbit-semi/conversations/topics/42515;_ylc=3DX3oDMTM2djJjZ2wyBF9TAzk3MzU5N= zE0BGdycElkAzIzMDczMTYEZ3Jwc3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzQyNTIwBHNlYwNmdHIE= c2xrA3Z0cGMEc3RpbWUDMTU1MzU1NDc5MgR0cGNJZAM0MjUxNQ--" style=3D"text-decorat= ion: none; color: #2D50FD;">Messages in this topic</a> (6) </td> </tr> </tbody> </table> =20=20=20=20=20=20=20=20 <div id=3D"megaphoneModule"> <hr style=3D"height:2px ; border-width:0; color:#E3E3E3; backgr= ound-color:#E3E3E3;"> <div> <div class=3D"stream" style=3D"margin-bottom:10px;"> <div style=3D"background-color:white;"> <div class=3D"sn-img" style=3D"display:inline;"><img name=3D"tn= _file" style=3D"padding:0px 10px;vertical-align:top;margin-top:5px;" src=3D= "https://s.yimg.com/ru/static/images/yg/img/megaphone/1464031581_phpFA8bON"= height=3D"82" width=3D"82"></div> <div class=3D"mod-txt" style=3D"display:inline-block;"> <a rel=3D"nofollow" name=3D"sub_url" target=3D"_blank" href= =3D"https://yho.com/1wwmgg" style=3D"color:#0000FF;display:block;margin-lef= t:5px;text-decoration:none;"><span style=3D"font-size:15px;">Have you tried= the highest rated email app?</span></a> <div style=3D"max-width:530px;padding:2px 5px;">With 4.5 st= ars in iTunes, the Yahoo Mail app is the highest rated email app on the mar= ket. 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