Sorry! Long post... Есть cs5350 (Se0/1 ip 172.16.4.62/30), на другой стороне ppp - riverstone 8000 (ip 172.16.4.61/30)
проблема: недооткрывается нормально ipcp, то есть все стопорится на стадии   ipcp Reqsent, либо (при ipcp open) не идет передача.  (На девайсе cs1605 с абсолютно такой же конфигурацией сериального интерфейса - канал встает нормально)
как забороть эту беду, подскажите плиз!

sho version:

IOS (tm) 5350 Software (C5350-IK9S-M), Version 12.3(12a), RELEASE SOFTWARE (fc2)
...
ROM: System Bootstrap, Version 12.2(1r)1, RELEASE SOFTWARE (fc1)
...
System image file is "flash:c5350-ik9s-mz.123-12a.bin"
...
cisco AS5350 (R7K) processor (revision T) with 262144K/131072K bytes of memory.
Processor board ID JAE0825M5Z4
R7000 CPU at 250MHz, Implementation 39, Rev 1.0, 256KB L2, 2048KB L3 Cache

sho run
...
interface Serial0/1
ip address 172.16.4.62 255.255.255.252
encapsulation ppp
no ip route-cache same-interface
...

deb ppp negotiation

Se0/1 PPP: Using default call direction
Se0/1 PPP: Treating connection as a dedicated line
Se0/1 PPP: Phase is ESTABLISHING, Active Open
Se0/1 LCP: O CONFREQ [Closed] id 104 len 10
Se0/1 LCP:    MagicNumber 0x334ABEEA (0x0506334ABEEA)
Se0/1 LCP: TIMEout: State REQsent
Se0/1 LCP: O CONFREQ [REQsent] id 109 len 10
Se0/1 LCP:    MagicNumber 0x334ABEEA (0x0506334ABEEA)
Se0/1 LCP: I CONFREQ [REQsent] id 23 len 14
Se0/1 LCP:    MRU 1524 (0x010405F4)
Se0/1 LCP:    MagicNumber 0xECA83705 (0x0506ECA83705)
Se0/1 LCP: O CONFACK [REQsent] id 23 len 14
Se0/1 LCP:    MRU 1524 (0x010405F4)
Se0/1 LCP:    MagicNumber 0xECA83705 (0x0506ECA83705)
Se0/1 LCP: I CONFACK [ACKsent] id 109 len 10
Se0/1 LCP:    MagicNumber 0x334ABEEA (0x0506334ABEEA)
Se0/1 LCP: State is Open
Se0/1 PPP: Phase is FORWARDING, Attempting Forward
Se0/1 PPP: Phase is ESTABLISHING, Finish LCP
Se0/1 PPP: Phase is UP
Se0/1 IPCP: O CONFREQ [Closed] id 1 len 10
Se0/1 IPCP:    Address 172.16.4.62 (0x0306AC10043E)
Se0/1 CDPCP: O CONFREQ [Closed] id 1 len 4
Se0/1 PPP: Process pending ncp packets
Se0/1 BNCP: I CONFREQ [Not negotiated] id 1 len 10
Se0/1 BNCP:    MACSupport IEEE 802.3/Ethernet (0x030301)
Se0/1 BNCP:    LANIdentification enabled (0x050301)
Se0/1 LCP: O PROTREJ [Open] id 110 len 16 protocol BNCP (0x80310101000A030301050301)
Se0/1 IPXCP: I CONFREQ [Not negotiated] id 1 len 22
Se0/1 IPXCP:    Network 0x00000000 (0x010600000000)
Se0/1 IPXCP:    Node 0000.0000.0000 (0x0208000000000000)
Se0/1 IPXCP:    Routing 2 (0x04040002)
Se0/1 LCP: O PROTREJ [Open] id 111 len 28 protocol IPXCP
Se0/1 LCP:  (0x802B0101001601060000000002080000)
Se0/1 LCP:  (0x0000000004040002)
Se0/1 OSICP: I CONFREQ [Not negotiated] id 1 len 4
Se0/1 LCP: O PROTREJ [Open] id 112 len 10 protocol OSICP (0x802301010004)
Se0/1 IPCP: I TERMACK [REQsent] id 1 len 4
Se0/1 LCP: I PROTREJ [Open] id 4 len 10 protocol CDPCP (0x820701010004)
Se0/1 CDPCP: State is Closed
Se0/1 CDPCP: State is Listen
Se0/1 PPP: Outbound cdp packet dropped
Se0/1 PPP: Outbound cdp packet dropped
Se0/1 PPP: Outbound cdp packet dropped
Se0/1 IPCP: TIMEout: State REQsent
Se0/1 IPCP: O CONFREQ [REQsent] id 2 len 10
Se0/1 IPCP:    Address 172.16.4.62 (0x0306AC10043E)
Se0/1 IPCP: I TERMACK [REQsent] id 2 len 4
Se0/1 IPCP: TIMEout: State REQsent
Se0/1 IPCP: O CONFREQ [REQsent] id 3 len 10
Se0/1 IPCP:    Address 172.16.4.62 (0x0306AC10043E)
Se0/1 IPCP: I TERMACK [REQsent] id 3 len 4
Se0/1 IPCP: TIMEout: State REQsent
Se0/1 IPCP: O CONFREQ [REQsent] id 4 len 10
Se0/1 IPCP:    Address 172.16.4.62 (0x0306AC10043E)

Редкое опадание IPCP в стадию open:

Se0/1 PPP: Phase is UP
Se0/1 IPCP: O CONFREQ [Closed] id 1 len 10
Se0/1 IPCP:    Address 172.16.4.62 (0x0306AC10043E)
Se0/1 CDPCP: O CONFREQ [Closed] id 1 len 4
Se0/1 PPP: Process pending ncp packets
Se0/1 IPCP: I CONFREQ [REQsent] id 1 len 10
Se0/1 IPCP:    Address 172.16.4.61 (0x0306AC10043D)
Se0/1 IPCP: Cannot satisfy pool request
Se0/1 IPCP: Neither side knows remote address
Se0/1 IPCP: O CONFREJ [REQsent] id 1 len 10
Se0/1 IPCP:    Address 172.16.4.61 (0x0306AC10043D)
Se0/1 BNCP: I CONFREQ [Not negotiated] id 1 len 10
Se0/1 BNCP:    MACSupport IEEE 802.3/Ethernet (0x030301)
Se0/1 BNCP:    LANIdentification enabled (0x050301)
Se0/1 LCP: O PROTREJ [Open] id 101 len 16 protocol BNCP (0x80310101000A030301050301)
Se0/1 IPXCP: I CONFREQ [Not negotiated] id 1 len 22
Se0/1 IPXCP:    Network 0x00000000 (0x010600000000)
Se0/1 IPXCP:    Node 0000.0000.0000 (0x0208000000000000)
Se0/1 IPXCP:    Routing 2 (0x04040002)
Se0/1 LCP: O PROTREJ [Open] id 102 len 28 protocol IPXCP
Se0/1 LCP:  (0x802B0101001601060000000002080000)
Se0/1 LCP:  (0x802B0101001601060000000002080000)
Se0/1 LCP:  (0x0000000004040002)
Se0/1 OSICP: I CONFREQ [Not negotiated] id 1 len 4
Se0/1 LCP: O PROTREJ [Open] id 103 len 10 protocol OSICP (0x802301010004)
Se0/1 IPCP: I CONFACK [REQsent] id 1 len 10
Se0/1 IPCP:    Address 172.16.4.62 (0x0306AC10043E)
Se0/1 LCP: I PROTREJ [Open] id 3 len 10 protocol CDPCP (0x820701010004)
Se0/1 CDPCP: State is Closed
Se0/1 CDPCP: State is Listen
Se0/1 IPCP: I CONFREQ [ACKrcvd] id 2 len 4
Se0/1 IPCP: O CONFACK [ACKrcvd] id 2 len 4
Se0/1 IPCP: State is Open
(Извините за такое длинное послание)
Спасибо!

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