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<TITLE>RE: [j-nsp] ppp lcp mru problem</TITLE>
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<P><FONT SIZE=2>JUNOS doesn't send an MRU. According to the PPP RFC if a host doesn't receive an MRU from their peer they should fall back to the minimum MTU for the link, IOS doesn't which is why you'll be able to 'negotiate' 4470 across POS. I've heard this is going to be fixed in a future JUNOS release.</FONT></P>
<P><FONT SIZE=2>b</FONT>
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<P><FONT SIZE=2>-----Original Message-----</FONT>
<BR><FONT SIZE=2>From: David Liang [<A HREF="mailto:davidliang02@hotmail.com">mailto:davidliang02@hotmail.com</A>]</FONT>
<BR><FONT SIZE=2>Sent: February 4, 2003 8:55 PM</FONT>
<BR><FONT SIZE=2>To: juniper-nsp@puck.nether.net</FONT>
<BR><FONT SIZE=2>Subject: [j-nsp] ppp lcp mru problem</FONT>
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<P><FONT SIZE=2>Hi, All</FONT>
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<P><FONT SIZE=2>>From the debugging info for ppp negotiation between Juniper/IOS, I didn't </FONT>
<BR><FONT SIZE=2>see the MRU info from Juniper side. Just wondering if it's a problem?</FONT>
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<P><FONT SIZE=2>Thks!</FONT>
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<P><FONT SIZE=2>Juniper <----------------------------> IOS</FONT>
<BR><FONT SIZE=2>so-0/2/0:172.16.0.1 Pos2/0:172.16.0.2</FONT>
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<P><FONT SIZE=2>*Feb 3 08:13:38.038 UTC: PO2/0 LCP: O CONFREQ [REQsent] id 14 len 14</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:38.038 UTC: PO2/0 LCP: MRU 4470 (0x01041176)</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:38.038 UTC: PO2/0 LCP: MagicNumber 0xEF59EB40 </FONT>
<BR><FONT SIZE=2>(0x0506EF59EB40)</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.002 UTC: PO2/0 LCP: I CONFREQ [REQsent] id 1 len 10</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.002 UTC: PO2/0 LCP: MagicNumber 0x3E3E5C82 </FONT>
<BR><FONT SIZE=2>(0x05063E3E5C82) <============== MRU missing here?</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.002 UTC: PO2/0 LCP: O CONFACK [REQsent] id 1 len 10</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.002 UTC: PO2/0 LCP: MagicNumber 0x3E3E5C82 </FONT>
<BR><FONT SIZE=2>(0x05063E3E5C82)</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.038 UTC: PO2/0 LCP: TIMEout: State ACKsent</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.038 UTC: PO2/0 LCP: O CONFREQ [ACKsent] id 15 len 14</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.038 UTC: PO2/0 LCP: MRU 4470 (0x01041176)</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.038 UTC: PO2/0 LCP: MagicNumber 0xEF59EB40 </FONT>
<BR><FONT SIZE=2>(0x0506EF59EB40)</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.038 UTC: PO2/0 LCP: I CONFACK [ACKsent] id 15 len 14</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.038 UTC: PO2/0 LCP: MRU 4470 (0x01041176)</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.038 UTC: PO2/0 LCP: MagicNumber 0xEF59EB40 </FONT>
<BR><FONT SIZE=2>(0x0506EF59EB40)</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.038 UTC: PO2/0 LCP: State is Open</FONT>
<BR><FONT SIZE=2>*Feb 3 08:13:40.038 UTC: PO2/0 PPP: Phase is UP</FONT>
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<P><FONT SIZE=2>_______________________________________________</FONT>
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