Cisco CME and C7200 Router Testing and Learning Environment on Ubuntu 20+ Setup Tutorial Guide
Since newer versions of Ubuntu like 20, you will find there is no longer dynagen and that the dynamips provided is faulty and will segfault each time:
Cisco Router Simulation Platform (version 0.2.14-amd64/Linux stable)
Copyright (c) 2005-2011 Christophe Fillot.
Build date: Apr 3 2018 12:20:29
Local UUID: 3c1c0b7f-2fab-4fda-b40b-74841d1bcfe0
Instance ID set to 1.
netio_tap_create: unable to open TAP device tap1 (No such file or directory)
C7200 'default': unable to create NETIO descriptor for slot 0
IOS image file: c7200-adventerprisek9-mz.151-4.M.bin
ILT: loaded table "mips64j" from cache.
ILT: loaded table "mips64e" from cache.
ILT: loaded table "ppc32j" from cache.
ILT: loaded table "ppc32e" from cache.
CPU0: carved JIT exec zone of 64 Mb into 2048 pages of 32 Kb.
C7200 instance 'default' (id 1):
VM Status : 0
RAM size : 256 Mb
IOMEM size : 0 Mb
NVRAM size : 128 Kb
NPE model : npe-400
Midplane : vxr
IOS image : c7200-adventerprisek9-mz.151-4.M.bin
Loading ELF file 'c7200-adventerprisek9-mz.151-4.M.bin'...
ELF entry point: 0x80008000
C7200 'default': starting simulation (CPU0 PC=0xffffffffbfc00000), JIT enabled.
Segmentation fault (core dumped)
Solution - Compile The Newer Version of dynamips
As you can see from the output, the newest version in the repo is 0.2.14 which was built in 2018. The versioning numbers themselves, without being a whole number, are understandly "alpha" sounding versions.
Clearly, something has to be fixed and there is no newer version in the repos, so we'll have to compile our own.
Fortunately the project was picked up and lives on here: https://github.com/GNS3/dynamips
Step 1 - Get Required Packages
apt install git libpcap0.8-dev libelf-dev cmake
Step 2 - Get Source Code:
git clone https://github.com/GNS3/dynamips
Cloning into 'dynamips'...
remote: Enumerating objects: 4195, done.
remote: Counting objects: 100% (775/775), done.
remote: Compressing objects: 100% (134/134), done.
remote: Total 4195 (delta 694), reused 641 (delta 641), pack-reused 3420 (from 1)
Receiving objects: 100% (4195/4195), 2.63 MiB | 20.39 MiB/s, done.
Resolving deltas: 100% (3019/3019), done.
Step 3 - Prepare Environment and Compile
cd dynamips
mkdir build
cd build
cmake .. -DDYNAMIPS_CODE=stable
You should see this at the end of successful compilation:
-- DYNAMIPS_FLAGS=-m64;-Wall;-O2;-fomit-frame-pointer
-- DYNAMIPS_DEFINITIONS=-DHAS_POSIX_MEMALIGN=1;-DDYNAMIPS_VERSION="0.2.23";-DJIT_ARCH="amd64";-DJIT_CPU=CPU_amd64;-DMIPS64_ARCH_INC_FILE="mips64_amd64_trans.h";-DPPC32_ARCH_INC_FILE="ppc32_amd64_trans.h";-D_FILE_OFFSET_BITS=64;-D_LARGEFILE_SOURCE;-D_LARGEFILE64_SOURCE;-DLINUX_ETH;-DGEN_ETH;-DHAS_RFC2553=1;-DOSNAME=Linux
-- DYNAMIPS_INCLUDES=/usr/include
-- DYNAMIPS_LIBRARIES=dl;rt;nsl;/usr/lib/x86_64-linux-gnu/libelf.so;-lpthread;/usr/lib/x86_64-linux-gnu/libpcap.so
-- configure - END
Summary:
CMAKE_INSTALL_PREFIX : /usr/local
DYNAMIPS_ARCH : amd64
DYNAMIPS_CODE : stable
DYNAMIPS_RENAME : dynamips_amd64_stable -> dynamips (auto)
BUILD_NVRAM_EXPORT : ON
BUILD_UDP_SEND : OFF
BUILD_UDP_RECV : OFF
Large File support : ENABLE_LARGEFILE=ON
Linux Ethernet (RAW sockets) : ENABLE_LINUX_ETH=ON (linux_eth)
Generic Ethernet (libpcap/WinPcap) : ENABLE_GEN_ETH=ON (gen_eth)
IPv6 support (RFC 2553) : ENABLE_IPV6=ON
-- Configuring done
-- Generating done
-- Build files have been written to: /root/dynamips/build
root@d038b4fbf6e1:~/dynamips/build#
Now make and install
make
make install
ln -s /usr/local/bin/dynamips /bin
Confirm it is the right version:
You should as below that it is version 0.2.23 and the compilation date should be the date and time you did this.
dynamips|head
Please specify an IOS image filename
Cisco Router Simulation Platform (version 0.2.23-amd64/Linux stable)
Copyright (c) 2005-2011 Christophe Fillot.
Build date: Sep 16 2024 21:09:39
Tags:
cisco, cme, router, ubuntu, tutorial, guidesince, newer, versions, dynagen, dynamips, provided, faulty, segfault, simulation, platform, amd, linux, copyright, christophe, fillot, apr, uuid, fab, fda, bcfe, netio_tap_create, unable, directory, default, netio, descriptor, slot, ios, adventerprisek, mz, bin, ilt, quot, mips, cache, ppc, cpu, carved, jit, exec, mb, kb, vm, ram, iomem, nvram, npe, midplane, vxr, loading, elf, entry, pc, xffffffffbfc, enabled, segmentation, compile, output, newest, repo, versioning, understandly, alpha, sounding, repos, ll, fortunately, https, github, gns, packages, apt, install, git, libpcap, dev, libelf, cmake, clone, cloning, enumerating, objects, compressing, delta, reused, receiving, mib, resolving, deltas, mkdir, ddynamips_code, compilation, dynamips_flags, fomit, pointer, dynamips_definitions, dhas_posix_memalign, ddynamips_version, djit_arch, djit_cpu, cpu_amd, dmips, _arch_inc_file, _amd, _trans, dppc, d_file_offset_bits, d_largefile_source, d_largefile, _source, dlinux_eth, dgen_eth, dhas_rfc, dosname, dynamips_includes, usr, dynamips_libraries, dl, rt, nsl, lib, _, gnu, lpthread, configure, summary, cmake_install_prefix, dynamips_arch, dynamips_code, dynamips_rename, dynamips_amd, _stable, auto, build_nvram_export, build_udp_send, build_udp_recv, enable_largefile, ethernet, sockets, enable_linux_eth, linux_eth, generic, winpcap, enable_gen_eth, gen_eth, ipv, rfc, enable_ipv, configuring, generating, fbf, ln, specify, filename, sep,