dhuber@aut.autelca.ascom.ch (Daniel Huber) (03/20/91)
Question:
Is this possible:
- HP9000/835 (HP-UX 7.0) with X.25
- Route X.25 packets from HP, not over X.25 interface, but over TCP/IP
to a Cisco router
- The Cisco router routes the X.25 packets from TCP/IP down to native
X.25 and into a public X.25 net...
- The same backwards
- If the scenario above works, is the Cisco router able to have
X.121 subaddresses ?
+---+ +---+
| | HP1 | | HP2
+-+-+ +-+-+
| |
| X.25 over TCP/IP | X.25 over TCP/IP
| |
------+-------+---------------+--------- TCP/IP LAN
|
| X.25 over TCP/IP
|
+-+-+
| | Cisco
+-+-+
| <-- Subadressing for HP1 and HP2 possible?
|
|
| X.25
|
--------------+------------------ X.25 Network
Thanks in advance for any responses... :-)
Daniel
--
Daniel Huber AD-KT2.6 VOICE: +41 31 52 96 64 FAX: +41 31 52 97 51
Ascom Autelca AG Network Engineer, Network,Mail and News Manager
CH-3073 Guemligen EMAIL: dhuber@autelca.ascom.ch
Switzerland UUCP: uunet!chx400!hslrswi!aut!dhuberallan@cheers.cisco.com (Allan Leinwand) (03/22/91)
In article <1637@aut.autelca.ascom.ch>, dhuber@aut.autelca.ascom.ch (Daniel Huber) writes: >Question: > >Is this possible: > >- HP9000/835 (HP-UX 7.0) with X.25 >- Route X.25 packets from HP, not over X.25 interface, but over TCP/IP > to a Cisco router >- The Cisco router routes the X.25 packets from TCP/IP down to native > X.25 and into a public X.25 net... > >- The same backwards > >- If the scenario above works, is the Cisco router able to have > X.121 subaddresses ? > > > +---+ +---+ > | | HP1 | | HP2 > +-+-+ +-+-+ > | | > | X.25 over TCP/IP | X.25 over TCP/IP > | | > ------+-------+---------------+--------- TCP/IP LAN > | > | X.25 over TCP/IP > | > +-+-+ > | | Cisco > +-+-+ > | <-- Subadressing for HP1 and HP2 possible? > | > | > | X.25 > | > --------------+------------------ X.25 Network > > >Thanks in advance for any responses... :-) > >Daniel Hello Daniel, First of all, to my knowledge HP does not allow for you to talk x.25 out of a LAN interface speaking Ethernet/802.3. I do know of a x.25 serial interface for the HP9000 series. If I am wrong, then HP must have devised an encapsulation scheme for wrapping x.25 in a TCP/IP packet. We here at cisco Systems do the same thing. We wrap x.25 packets in IP to provide connectivity through an IP network for x.25 nodes. To do this, we came up with our own undocumented encapsulation scheme. If the HP system used our encapsulation scheme then the cisco in your drawing would think that HP1 and HP2 are other ciscos and route the packet just like you want. Unfortunately, this means you may have to rewrite the applications or the drivers. Not a pretty picture... The other suggestion I have for you to is to see if the applications can use TCP/IP as a transport without x.25. If this is possible, then the cisco Protocol Translator (CPT) may help. This device can translate (not encapsulate) TCP/IP to x.25 and produce the results you desire. Please contact us at cs@cisco.com or 1-800-553-NETS for more details on the CPT. Thanks, Allan Leinwand cisco Systems leinwand@cisco.com
raj@hpindwa.cup.hp.com (Rick Jones) (03/22/91)
>>Is this possible: >> >>- HP9000/835 (HP-UX 7.0) with X.25 >>- Route X.25 packets from HP, not over X.25 interface, but over TCP/IP >> to a Cisco router >>- The Cisco router routes the X.25 packets from TCP/IP down to native >> X.25 and into a public X.25 net... >> >>- The same backwards >> >>- If the scenario above works, is the Cisco router able to have >> X.121 subaddresses ? > ><<picture deleted>> > I'm going to take a wild guess and say that you want to be able to have more than one system share the same subscription to the PDN??? > > First of all, to my knowledge HP does not allow for you to talk x.25 >out of a LAN interface speaking Ethernet/802.3. I do know of a x.25 >serial interface for the HP9000 series. If I am wrong, then HP must >have devised an encapsulation scheme for wrapping x.25 in a TCP/IP >packet. > While this is to my knowledge correct for the 9000's, the 3000/XL's do something like what is requested. The difference being: swap a DTC for the cisco, and a proprietary LAN protocol for the TCP/IP. Presto changeo, you have an X.25 'solution' ;-) where > 1 host can share the X.25 cards in the DTC(s). Everyone can do Level 3 access, and can run TCP/IP on top of it all... Of course, on the 3000/XL's, you can't do what the 9000's can - plug a serial line directly from the host into the net ;-) The current answer is: If you want level 3 from the 9K, you have at least 1 interface per host, and thus one subscription per host (??? X.25 charge policies fry my brain - this could be inaccurate) - ie no line sharing. Of course, you should feel free to submit any enhacement requests through the 'normal' means (you local HP rep types...)