Added lab "Left weight" from the exam on 2025-10-14

exam-labs/2025-10-14-left-weight/lab/lab/lab.conf

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+LAB_DESCRIPTION="A network's template"
+LAB_VERSION=6.9
+LAB_AUTHOR="S. Falcioli, A. Del Prete, G. Casteltrione, C. Adduce, R. Tiani, G. Sturm, J. H. F. Barroga"
+LAB_EMAIL=contact@kathara.org
+LAB_WEB=http://www.kathara.org/
+
+
+ra1[0]="A1"
+ra1[1]="B1"
+ra1[2]="M"
+ra1[image]="kathara/frr"
+
+rb1[0]="B1"
+rb1[1]="C1"
+rb1[2]="O"
+rb1[image]="kathara/frr"
+
+rc1[0]="C1"
+rc1[1]="D1"
+rc1[image]="kathara/frr"
+
+ra2[0]="A2"
+ra2[1]="B2"
+ra2[2]="M"
+ra2[3]="N"
+ra2[image]="kathara/frr"
+
+rb2[0]="B2"
+rb2[1]="C2"
+rb2[2]="O"
+rb2[image]="kathara/frr"
+
+ra3[0]="A3"
+ra3[1]="B3"
+ra3[2]="N"
+ra3[image]="kathara/frr"
+
+rb3[0]="B3"
+rb3[1]="C3"
+rb3[image]="kathara/frr"

exam-labs/2025-10-14-left-weight/lab/lab/ra1.startup

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+ip address add 1.1.0.1/16 dev eth0
+ip address add 1.2.0.2/16 dev eth1
+ip address add 12.0.0.1/30 dev eth2
+
+systemctl start frr

exam-labs/2025-10-14-left-weight/lab/lab/ra1/etc/frr/daemons

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+# This file tells the frr package which daemons to start.
+#
+# Sample configurations for these daemons can be found in
+# /usr/share/doc/frr/examples/.
+#
+# ATTENTION:
+#
+# When activating a daemon for the first time, a config file, even if it is
+# empty, has to be present *and* be owned by the user and group "frr", else
+# the daemon will not be started by /etc/init.d/frr. The permissions should
+# be u=rw,g=r,o=.
+# When using "vtysh" such a config file is also needed. It should be owned by
+# group "frrvty" and set to ug=rw,o= though. Check /etc/pam.d/frr, too.
+#
+# The watchfrr, zebra and staticd daemons are always started.
+#
+bgpd=no
+ospfd=yes
+ospf6d=no
+ripd=no
+ripngd=no
+isisd=no
+pimd=no
+pim6d=no
+ldpd=no
+nhrpd=no
+eigrpd=no
+babeld=no
+sharpd=no
+pbrd=no
+bfdd=no
+fabricd=no
+vrrpd=no
+pathd=no
+
+#
+# If this option is set the /etc/init.d/frr script automatically loads
+# the config via "vtysh -b" when the servers are started.
+# Check /etc/pam.d/frr if you intend to use "vtysh"!
+#
+vtysh_enable=yes
+zebra_options="  -A 127.0.0.1 -s 90000000"
+mgmtd_options="  -A 127.0.0.1"
+bgpd_options="   -A 127.0.0.1"
+ospfd_options="  -A 127.0.0.1"
+ospf6d_options=" -A ::1"
+ripd_options="   -A 127.0.0.1"
+ripngd_options=" -A ::1"
+isisd_options="  -A 127.0.0.1"
+pimd_options="   -A 127.0.0.1"
+pim6d_options="  -A ::1"
+ldpd_options="   -A 127.0.0.1"
+nhrpd_options="  -A 127.0.0.1"
+eigrpd_options=" -A 127.0.0.1"
+babeld_options=" -A 127.0.0.1"
+sharpd_options=" -A 127.0.0.1"
+pbrd_options="   -A 127.0.0.1"
+staticd_options="-A 127.0.0.1"
+bfdd_options="   -A 127.0.0.1"
+fabricd_options="-A 127.0.0.1"
+vrrpd_options="  -A 127.0.0.1"
+pathd_options="  -A 127.0.0.1"
+
+
+# If you want to pass a common option to all daemons, you can use the
+# "frr_global_options" variable.
+#
+#frr_global_options=""
+
+
+# The list of daemons to watch is automatically generated by the init script.
+# This variable can be used to pass options to watchfrr that will be passed
+# prior to the daemon list.
+#
+# To make watchfrr create/join the specified netns, add the the "--netns"
+# option here. It will only have an effect in /etc/frr/<somename>/daemons, and
+# you need to start FRR with "/usr/lib/frr/frrinit.sh start <somename>".
+#
+#watchfrr_options=""
+
+
+# configuration profile
+#
+#frr_profile="traditional"
+#frr_profile="datacenter"
+
+
+# This is the maximum number of FD's that will be available.  Upon startup this
+# is read by the control files and ulimit is called.  Uncomment and use a
+# reasonable value for your setup if you are expecting a large number of peers
+# in say BGP.
+#
+#MAX_FDS=1024
+
+# Uncomment this option if you want to run FRR as a non-root user. Note that
+# you should know what you are doing since most of the daemons need root
+# to work. This could be useful if you want to run FRR in a container
+# for instance.
+# FRR_NO_ROOT="yes"
+
+# For any daemon, you can specify a "wrap" command to start instead of starting
+# the daemon directly. This will simply be prepended to the daemon invocation.
+# These variables have the form daemon_wrap, where 'daemon' is the name of the
+# daemon (the same pattern as the daemon_options variables).
+#
+# Note that when daemons are started, they are told to daemonize with the `-d`
+# option. This has several implications. For one, the init script expects that
+# when it invokes a daemon, the invocation returns immediately. If you add a
+# wrap command here, it must comply with this expectation and daemonize as
+# well, or the init script will never return. Furthermore, because daemons are
+# themselves daemonized with -d, you must ensure that your wrapper command is
+# capable of following child processes after a fork() if you need it to do so.
+#
+# If your desired wrapper does not support daemonization, you can wrap it with
+# a utility program that daemonizes programs, such as 'daemonize'. An example
+# of this might look like:
+#
+# bgpd_wrap="/usr/bin/daemonize /usr/bin/mywrapper"
+#
+# This is particularly useful for programs which record processes but lack
+# daemonization options, such as perf and rr.
+#
+# If you wish to wrap all daemons in the same way, you may set the "all_wrap"
+# variable.
+#
+#all_wrap=""

exam-labs/2025-10-14-left-weight/lab/lab/ra1/etc/frr/frr.conf

@@ -0,0 +1,19 @@
+!
+! FRRouting configuration file
+!
+!
+!    OSPF CONFIGURATION
+!
+
+router ospf
+! Speak OSPF on all interfaces falling in the listed subnets
+
+network 1.1.0.0/16 area 1.1.1.1
+network 1.2.0.0/16 area 1.1.1.1
+network 12.0.0.0/30 area 0.0.0.0
+
+area 1.1.1.1 stub
+
+redistribute connected
+!
+log file /var/log/frr/frr.log

exam-labs/2025-10-14-left-weight/lab/lab/ra1/etc/frr/vtysh.conf

@@ -0,0 +1 @@
+service integrated-vtysh-config

exam-labs/2025-10-14-left-weight/lab/lab/ra2.startup

@@ -0,0 +1,7 @@
+ip address add 2.1.0.1/16 dev eth0
+ip address add 2.2.0.2/16 dev eth1
+ip address add 12.0.0.2/30 dev eth2
+ip address add 23.0.0.1/30 dev eth3
+ip route add default via 23.0.0.2 dev eth3
+
+systemctl start frr

exam-labs/2025-10-14-left-weight/lab/lab/ra2/etc/frr/daemons

@@ -0,0 +1,125 @@
+# This file tells the frr package which daemons to start.
+#
+# Sample configurations for these daemons can be found in
+# /usr/share/doc/frr/examples/.
+#
+# ATTENTION:
+#
+# When activating a daemon for the first time, a config file, even if it is
+# empty, has to be present *and* be owned by the user and group "frr", else
+# the daemon will not be started by /etc/init.d/frr. The permissions should
+# be u=rw,g=r,o=.
+# When using "vtysh" such a config file is also needed. It should be owned by
+# group "frrvty" and set to ug=rw,o= though. Check /etc/pam.d/frr, too.
+#
+# The watchfrr, zebra and staticd daemons are always started.
+#
+bgpd=no
+ospfd=yes
+ospf6d=no
+ripd=no
+ripngd=no
+isisd=no
+pimd=no
+pim6d=no
+ldpd=no
+nhrpd=no
+eigrpd=no
+babeld=no
+sharpd=no
+pbrd=no
+bfdd=no
+fabricd=no
+vrrpd=no
+pathd=no
+#
+# If this option is set the /etc/init.d/frr script automatically loads
+# the config via "vtysh -b" when the servers are started.
+# Check /etc/pam.d/frr if you intend to use "vtysh"!
+#
+vtysh_enable=yes
+zebra_options="  -A 127.0.0.1 -s 90000000"
+mgmtd_options="  -A 127.0.0.1"
+bgpd_options="   -A 127.0.0.1"
+ospfd_options="  -A 127.0.0.1"
+ospf6d_options=" -A ::1"
+ripd_options="   -A 127.0.0.1"
+ripngd_options=" -A ::1"
+isisd_options="  -A 127.0.0.1"
+pimd_options="   -A 127.0.0.1"
+pim6d_options="  -A ::1"
+ldpd_options="   -A 127.0.0.1"
+nhrpd_options="  -A 127.0.0.1"
+eigrpd_options=" -A 127.0.0.1"
+babeld_options=" -A 127.0.0.1"
+sharpd_options=" -A 127.0.0.1"
+pbrd_options="   -A 127.0.0.1"
+staticd_options="-A 127.0.0.1"
+bfdd_options="   -A 127.0.0.1"
+fabricd_options="-A 127.0.0.1"
+vrrpd_options="  -A 127.0.0.1"
+pathd_options="  -A 127.0.0.1"
+
+
+# If you want to pass a common option to all daemons, you can use the
+# "frr_global_options" variable.
+#
+#frr_global_options=""
+
+
+# The list of daemons to watch is automatically generated by the init script.
+# This variable can be used to pass options to watchfrr that will be passed
+# prior to the daemon list.
+#
+# To make watchfrr create/join the specified netns, add the the "--netns"
+# option here. It will only have an effect in /etc/frr/<somename>/daemons, and
+# you need to start FRR with "/usr/lib/frr/frrinit.sh start <somename>".
+#
+#watchfrr_options=""
+
+
+# configuration profile
+#
+#frr_profile="traditional"
+#frr_profile="datacenter"
+
+
+# This is the maximum number of FD's that will be available.  Upon startup this
+# is read by the control files and ulimit is called.  Uncomment and use a
+# reasonable value for your setup if you are expecting a large number of peers
+# in say BGP.
+#
+#MAX_FDS=1024
+
+# Uncomment this option if you want to run FRR as a non-root user. Note that
+# you should know what you are doing since most of the daemons need root
+# to work. This could be useful if you want to run FRR in a container
+# for instance.
+# FRR_NO_ROOT="yes"
+
+# For any daemon, you can specify a "wrap" command to start instead of starting
+# the daemon directly. This will simply be prepended to the daemon invocation.
+# These variables have the form daemon_wrap, where 'daemon' is the name of the
+# daemon (the same pattern as the daemon_options variables).
+#
+# Note that when daemons are started, they are told to daemonize with the `-d`
+# option. This has several implications. For one, the init script expects that
+# when it invokes a daemon, the invocation returns immediately. If you add a
+# wrap command here, it must comply with this expectation and daemonize as
+# well, or the init script will never return. Furthermore, because daemons are
+# themselves daemonized with -d, you must ensure that your wrapper command is
+# capable of following child processes after a fork() if you need it to do so.
+#
+# If your desired wrapper does not support daemonization, you can wrap it with
+# a utility program that daemonizes programs, such as 'daemonize'. An example
+# of this might look like:
+#
+# bgpd_wrap="/usr/bin/daemonize /usr/bin/mywrapper"
+#
+# This is particularly useful for programs which record processes but lack
+# daemonization options, such as perf and rr.
+#
+# If you wish to wrap all daemons in the same way, you may set the "all_wrap"
+# variable.
+#
+#all_wrap=""

exam-labs/2025-10-14-left-weight/lab/lab/ra2/etc/frr/frr.conf

@@ -0,0 +1,18 @@
+!
+! FRRouting configuration file
+!
+!
+!    OSPF CONFIGURATION
+!
+
+router ospf
+! Speak OSPF on all interfaces falling in the listed subnets
+
+network 2.1.0.0/16 area 0.0.0.0
+network 2.2.0.0/16 area 0.0.0.0
+network 12.0.0.0/30 area 0.0.0.0
+
+redistribute connected
+default-information originate always
+!
+log file /var/log/frr/frr.log

exam-labs/2025-10-14-left-weight/lab/lab/ra2/etc/frr/vtysh.conf

@@ -0,0 +1,2 @@
+service integrated-vtysh-config
+default-information originate always

exam-labs/2025-10-14-left-weight/lab/lab/ra3.startup

@@ -0,0 +1,6 @@
+ip address add 200.1.0.1/16 dev eth0
+ip address add 200.2.0.2/16 dev eth1
+ip address add 23.0.0.2/30 dev eth2
+ip route add default via 23.0.0.1 dev eth2
+
+systemctl start frr