I'm trying to understand frame relay but finding some of the examples hard to replicate in my home lab. None of the examples in any of my boooks (CCNA ICND2 by Wendell Odom / CCNA command quick reference or on the CBT nuggets CD) explain how to set frame relay up in a lab.
I found a document on Cisco's site called Back-to-Back Frame Relay Hybrid Switching which gives the router config command 'frame-relay switching' to turn on frame relay switching, but no other commands in order to set up virtual DLCIs. I have succesfully created a frame relay link between two of my routers (see below screen dump) but the only way it works is with both point-to-point sub-interfaces using the same DLCI number, which is contrary to how all the examples in my book work.
Maybe I'm missing something or maybe I'm trying to create too complex an environment for a basic lab, but it is frustrating none the less. Any ideas?
GROUCHO#show run int s0/0.100 Building configuration...
Current configuration : 122 bytes ! interface Serial0/0.100 point-to-point ip address 192.168.10.1 255.255.255.252 frame-relay interface-dlci 101 end
CHICO#show run int s0.1 Building configuration...
Current configuration: ! interface Serial0.1 point-to-point ip address 192.168.10.2 255.255.255.252 no ip directed-broadcast frame-relay interface-dlci 101 end
Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.10.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 36/39/52 ms CHICO#show fram CHICO#show frame-relay map Serial0 (up): ip 192.168.2.2 dlci 122(0x7A,0x1CA0), static, broadcast, CISCO, status defined, active Serial0.2 (up): point-to-point dlci, dlci 112(0x70,0x1C00), broadcast status defined, active Serial0.1 (up): point-to-point dlci, dlci 101(0x65,0x1850), broadcast status defined, active CHICO#
Show version commands of both routers used:
CHICO#show version Cisco Internetwork Operating System Software IOS (tm) 2500 Software (C2500-D-L), Version 12.0(11), RELEASE SOFTWARE (fc1) Copyright (c) 1986-2000 by cisco Systems, Inc. Compiled Sat 20-May-00 06:39 by htseng Image text-base: 0x030388AC, data-base: 0x00001000
ROM: System Bootstrap, Version 11.0(10c), SOFTWARE BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c), RELEASE SOFTWARE (fc1)
CHICO uptime is 2 hours, 48 minutes System restarted by power-on System image file is "flash:c2500-d-l_120-11.bin"
cisco 2500 (68030) processor (revision L) with 6144K/2048K bytes of memory. Processor board ID 06110204, with hardware revision 00000000 Bridging software. X.25 software, Version 3.0.0. Basic Rate ISDN software, Version 1.1.1 Token Ring/IEEE 802.5 interface(s) 2 Serial network interface(s) 1 ISDN Basic Rate interface(s) 32K bytes of non-volatile configuration memory. 8192K bytes of processor board System flash (Read ONLY)
Configuration register is 0x2102
GROUCHO#show version Cisco Internetwork Operating System Software IOS (tm) C2600 Software (C2600-I-M), Version 12.2(27), RELEASE SOFTWARE (fc3) Copyright (c) 1986-2004 by cisco Systems, Inc. Compiled Tue 02-Nov-04 23:44 by kellmill Image text-base: 0x8000808C, data-base: 0x80A1F47C
ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
GROUCHO uptime is 2 hours, 47 minutes System returned to ROM by power-on System image file is "flash:c2600-i-mz.122-27.bin"
cisco 2611 (MPC860) processor (revision 0x203) with 61440K/4096K bytes of memory. Processor board ID JAD04420E7O (4253923018) M860 processor: part number 0, mask 49 Bridging software. X.25 software, Version 220.127.116.11 Ethernet/IEEE 802.3 interface(s) 1 Serial network interface(s) 32K bytes of non-volatile configuration memory. 8192K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102