Question : Adding a sub-interface for new frame relay service

Hello!  I am in the process of moving a Cisco 1720 router to a new installation. Though I've done a lot with access lists, I've never had to set up an interface from scratch in the past.

Basically, I'm starting with:

interface Serial0/0
ip address 255.255.255.252
no ip directed broadcast
encapsulation ppp
no ip mroute-cache
no fair-queue
service-module t1 timeslots 1-8

I gave that info to our new T1 provider, and they sent me back this snipet:

interface Serial0/1.1 point-to-point
 bandwidth 1536
 ip address 255.255.255.252
 frame-relay interface-dlci 16

My understanding is that I am adding this as a sub-interface and, other than the ip address, leaving the primary intrerface as-is.  Unfortunately, I never got past the "interface" command.

First, it appears that the "/1.1" given was incorrect... the only syntax that I was able to get to work was:
interface serial0.1

Once I got that figured out, I deleted the interface, and tried to re-create it, this time using the "point-to-point" option.  I received:

nfr.nhvt.net#conf term
Enter configuration commands, one per line.  End with CNTL/Z.
nfr.nhvt.net(config)#interface serial0.1 point-to-point
                                         ^     << Note:  marker s/b under first "P" in point-to-point>>
% Invalid input detected at '^' marker.  

Is my serial0.1 still wrong?  Is this not a valid command for my model / version (see below)


Finally, I gave up on the point-to-point option, and tried to enter the rest...

nfr.nhvt.net(config)#interface serial0.1
nfr.nhvt.net(config-subif)#ip address 255.255.255.252
nfr.nhvt.net(config-subif)#frame-relay interface-dlci 16
                           ^      <
% Invalid input detected at '^' marker.

Again, am I keying this incorrectly?

I apologize in advance that my responses will be rather slow... I can only test this between 4 and 5am, as this is a production router and those are about the only hours I can shut our current system down.

Thanks!


============ Version info =======================
nfr.nhvt.net#sho version
Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-Y-M), Version 12.1(3), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2000 by cisco Systems, Inc.
Compiled Wed 05-Jul-00 17:07 by cmong
Image text-base: 0x80008088, data-base: 0x805CDB90

ROM: System Bootstrap, Version 12.0(3)T, RELEASE SOFTWARE (fc1)

nfr.nhvt.net uptime is 5 minutes
System returned to ROM by power-on
System image file is "flash:c1700-y-mz.121-3"

cisco 1720 (MPC860) processor (revision 0x601) with 24576K/8192K bytes of memory
.
Processor board ID JAD051700CP (2520528757), with hardware revision 0000
M860 processor: part number 0, mask 32
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
WIC T1-DSU
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

Answer : Adding a sub-interface for new frame relay service

you put the

encapsulation frame-relay

command on your physical serial interface

interface s0/0

also on this interface you have to put the lmi-type

 frame-relay lmi-type ansi        (check with your carrier what the lmi type should be

and on the sub interface, all you need is the address you are using and teh DLCI

frame-relay interface-dlci 16