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#!/bin/bash
# Public domain, not copyrighted..
NUM=5
VTYBASE=2610
ASBASE=64560
BGPD=/path/to/bgpd
PREFIX=192.168.145
CONFBASE=/tmp
PIDBASE=/var/run/quagga
CHOWNSTR=quagga:quagga
for H in `seq 1 ${NUM}` ; do
CONF="${CONFBASE}"/bgpd${H}.conf
ADDR=${PREFIX}.${H}
if [ ! -e "$CONF" ] ; then
# This sets up a ring of bgpd peerings
NEXT=$(( ($H % ${NUM}) + 1 ))
PREV=$(( (($H + 3) % ${NUM}) + 1 ))
NEXTADDR="${PREFIX}.${NEXT}"
NEXTAS=$((${ASBASE} + $NEXT))
PREVADDR="${PREFIX}.${PREV}"
PREVAS=$((${ASBASE} + $PREV))
# Edit config to suit.
cat > "$CONF" <<- EOF
password whatever
service advanced-vty
!
router bgp $((64560+${H}))
bgp router-id ${ADDR}
network 10.${H}.1.0/24 pathlimit 1
network 10.${H}.2.0/24 pathlimit 2
network 10.${H}.3.0/24 pathlimit 3
neighbor default peer-group
neighbor default update-source ${ADDR}
neighbor default capability orf prefix-list both
neighbor default soft-reconfiguration inbound
neighbor ${NEXTADDR} remote-as ${NEXTAS}
neighbor ${NEXTADDR} peer-group default
neighbor ${PREVADDR} remote-as ${PREVAS}
neighbor ${PREVADDR} peer-group default
!
address-family ipv6
network fffe:${H}::/48
network fffe:${H}:1::/48 pathlimit 1
network fffe:${H}:2::/48 pathlimit 3
network fffe:${H}:3::/48 pathlimit 3
neighbor default activate
neighbor default capability orf prefix-list both
neighbor default default-originate
neighbor ${NEXTADDR} peer-group default
neighbor ${PREVADDR} peer-group default
exit-address-family
!
line vty
!
end
EOF
chown ${CHOWNSTR} "$CONF"
fi
# You may want to automatically add configure a local address
# on a loop interface.
#
# Solaris: ifconfig vni${H} plumb ${ADDR}/32 up
# Linux: ip address add ${ADDR}/32 dev lo 2> /dev/null
${BGPD} -i "${PIDBASE}"/bgpd${H}.pid \
-l ${ADDR} \
-f "${CONF}" \
-P $((${VTYBASE}+${H})) \
-d
done
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