(ASCEND) Re: Direct Connection between Channelized E1 interfaces.

["Basil V. Dolmatov" <dol@east.ru>]

On Tue, 6 Jul 1999, jhyang wrote:

> 
>  Thanks for your reponse.
> 
>  No, I don't want frame relay yet..
>  B-STDX 9000 support HDLC encapsulation between F-R clouds.
> 
>  I want to make clear channels between F-R clouds.
> 
>     [R] ---- [F-R Clouds (ascend switches)] ----- [R']
>         ^hdlc                               ^hdlc
> 
>  Ascend switches automatically converse between hdlc and frame relay
>  framing.
1) I do not think that Cisco HDLC and Ascend HDLC will interoperate.
   (That is partially proved by "line protocol down")
2) I doubt that you really want E1 to be splitted in 30 TDM timeslots
and that Ascend is configured in the same manner.
3) If both assumptions are wrong (quite possible ;), then use
"debug serial interface" command on Cisco in order to see keepalive
exchange and to find possible problems.

I would advise to double-check: 1) coincidence of HDLC definitions in
Ascend and Cisco (HDLC - is proprietary standard), 2) that Ascend in 
configured to accept 30 TDM timeslots in this E1 trunk.

> 
>  --Jaeho Yang
>    jhyang@nuri.net
> 
> "Heskett, Tony" wrote:
> > 
> > You've got encaps hdlc on the cisco side;  don't you want fr/ansi ?
> > 
> > > -----Original Message-----
> > > From: jhyang [mailto:jhyang@nuri.net]
> > > Sent: Tuesday, July 06, 1999 8:19 AM
> > > To: cisco@spot.colorado.edu; ascend-users@max.bungi.com;
> > > inet-access@earth.com
> > > Subject: Direct Connection between Channelized E1 interfaces.
> > >
> > >
> > >
> > > Hi.
> > >
> > > I want to connect directly between channelized E1 on cisco and
> > > channelized E1 on FR
> > > switch(Ascend B-STDX 9000).
> > >
> > > I made the cable RX - TX, TX - RX (I'm not sure. I tried 4
> > > combination.
> > > ^_^).
> > >
> > >
> > >   [Cisco 7000 CH E1 port] ---------- [B-STDX 9000 CH E1 port]
> > >                            ^ direct connection without any TELCO
> > > devices.
> > >
> > > After that, E1 connection (physical) is up.
> > >
> > > # sh cont e1
> > > E1 3/0 is up.
> > >   Applique type is Channelized E1 - balanced
> > >   No alarms detected.
> > >   Framing is NO-CRC4, Line Code is HDB3, Clock Source is Internal.
> > >   Data in current interval (765 seconds elapsed):
> > >      0 Line Code Violations, 0 Path Code Violations
> > >      0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
> > >      0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail
> > > Secs
> > >
> > >
> > > # sh conf
> > > :
> > > :
> > > controller E1 3/0
> > >  framing NO-CRC4                  <-- the same as FR switch framing
> > >  clock source line              <-- I'm not sure, it is default.
> > >  channel-group 0 timeslots 1      <-- Configure 30 channel-groups
> > >  channel-group 1 timeslots 2
> > >  channel-group 2 timeslots 3
> > >  channel-group 3 timeslots 4
> > >  channel-group 4 timeslots
> > > 5
> > > :
> > > :
> > > interface Serial3/0:2
> > >  description *** P 02
> > >  ip address 10.0.2.1 255.255.255.0
> > >  no ip mroute-cache
> > >  no fair-queue
> > > !
> > > interface Serial3/0:1
> > >  description *** P 01
> > >  ip address 10.0.1.1 255.255.255.0
> > >  no ip mroute-cache
> > >  no fair-queue
> > > !
> > > interface Serial3/0:0
> > >  description *** P 00
> > >  ip address 10.0.0.1 255.255.255.0
> > >  no ip mroute-cache
> > >  bandwidth 56000
> > > !
> > > :
> > > :
> > > After configuration from Cisco Router, I made "Lport(Logical Port)" on
> > > F-R switch, and
> > > setup PVC(s) with this Lport.
> > >
> > > But "line protocol" on Cisco side never 'up'.. (down)
> > >
> > > #sh int s3/0:0
> > > Serial3/0:0 is up, line protocol is down
> > >   Hardware is cxBus E1
> > >   Description: *** P 00
> > >   Internet address is 10.0.0.1/24
> > >   MTU 1500 bytes, BW 56000 Kbit, DLY 20000 usec, rely 255/255, load
> > > 1/255
> > >   Encapsulation HDLC, loopback not set, keepalive set (10 sec)
> > >   Last input never, output 00:00:02, output hang never
> > >   Last clearing of "show interface" counters never
> > >   Queueing strategy: fifo
> > >   Output queue 0/40, 0 drops; input queue 0/75, 0 drops
> > >   5 minute input rate 0 bits/sec, 0 packets/sec
> > >   5 minute output rate 0 bits/sec, 0 packets/sec
> > >      0 packets input, 0 bytes, 0 no buffer
> > >      Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
> > >      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
> > >      159911 packets output, 3838135 bytes, 0 underruns
> > >      0 output errors, 0 collisions, 3 interface resets
> > >      0 output buffer failures, 0 output buffers swapped out
> > >      5 carrier transitions no alarm present
> > >   Timeslot(s) Used:1, Transmitter delay is 0 flags, transmit queue
> > > length 0
> > >
> > > At Frame Relay switch side, the operation status of Lport is 'up'.
> > >
> > > Is there any missing on building direct connection between each
> > > channelized
> > > interfaces. (without any TELCO devices).
> > >
> > >
> > > Any comments appreicates...
> > >
> > >
> > > Regards,,,
> > >
> > > --Jaeho Yang
> > >   jhyang@nuri.net
> > >
> 

--------------------------------------
Basil (Vasily)  Dolmatov  CCNP-Security, CCDA
East Connection ISP, Moscow, Russia. (http://www.east.ru)

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