[j-nsp] ppp lcp mru problem

[Beatty Lane-Davis]

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.
b

-----Original Message-----
From: David Liang [mailto:davidliang02 at hotmail.com]
Sent: February 4, 2003 8:55 PM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] ppp lcp mru problem


Hi, All

>From the debugging info for ppp negotiation between Juniper/IOS, I didn't 
see the MRU info from Juniper side. Just wondering if it's a problem?

Thks!

Juniper <----------------------------> IOS
so-0/2/0:172.16.0.1           Pos2/0:172.16.0.2

*Feb  3 08:13:38.038 UTC: PO2/0 LCP: O CONFREQ [REQsent] id 14 len 14
*Feb  3 08:13:38.038 UTC: PO2/0 LCP:    MRU 4470 (0x01041176)
*Feb  3 08:13:38.038 UTC: PO2/0 LCP:    MagicNumber 0xEF59EB40 
(0x0506EF59EB40)
*Feb  3 08:13:40.002 UTC: PO2/0 LCP: I CONFREQ [REQsent] id 1 len 10
*Feb  3 08:13:40.002 UTC: PO2/0 LCP:    MagicNumber 0x3E3E5C82 
(0x05063E3E5C82)                  <============== MRU missing here?
*Feb  3 08:13:40.002 UTC: PO2/0 LCP: O CONFACK [REQsent] id 1 len 10
*Feb  3 08:13:40.002 UTC: PO2/0 LCP:    MagicNumber 0x3E3E5C82 
(0x05063E3E5C82)
*Feb  3 08:13:40.038 UTC: PO2/0 LCP: TIMEout: State ACKsent
*Feb  3 08:13:40.038 UTC: PO2/0 LCP: O CONFREQ [ACKsent] id 15 len 14
*Feb  3 08:13:40.038 UTC: PO2/0 LCP:    MRU 4470 (0x01041176)
*Feb  3 08:13:40.038 UTC: PO2/0 LCP:    MagicNumber 0xEF59EB40 
(0x0506EF59EB40)
*Feb  3 08:13:40.038 UTC: PO2/0 LCP: I CONFACK [ACKsent] id 15 len 14
*Feb  3 08:13:40.038 UTC: PO2/0 LCP:    MRU 4470 (0x01041176)
*Feb  3 08:13:40.038 UTC: PO2/0 LCP:    MagicNumber 0xEF59EB40 
(0x0506EF59EB40)
*Feb  3 08:13:40.038 UTC: PO2/0 LCP: State is Open
*Feb  3 08:13:40.038 UTC: PO2/0 PPP: Phase is UP





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