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chassis-packet: Update arp_update script for FAILED and STALE check (#16311) (#16423)

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mssonicbld 2023-09-03 21:24:17 +08:00 committed by GitHub
parent 5e4cda9c1c
commit d62ae374a9
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1 changed files with 12 additions and 6 deletions
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files/scripts/arp_update
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@ -25,29 +25,35 @@ while /bin/true; do
for i in ${!STATIC_ROUTE_NEXTHOPS[@]}; do for i in ${!STATIC_ROUTE_NEXTHOPS[@]}; do
nexthop="${STATIC_ROUTE_NEXTHOPS[i]}" nexthop="${STATIC_ROUTE_NEXTHOPS[i]}"
if [[ $nexthop == *"."* ]]; then if [[ $nexthop == *"."* ]]; then
neigh_state=( $(ip -4 neigh show | grep -w $nexthop | tr -s ' ' | cut -d ' ' -f 3,4) ) neigh_state=$(ip -4 neigh show | grep -w $nexthop | tr -s ' ')
ping_prefix=ping ping_prefix=ping
elif [[ $nexthop == *":"* ]] ; then elif [[ $nexthop == *":"* ]] ; then
neigh_state=( $(ip -6 neigh show | grep -w $nexthop | tr -s ' ' | cut -d ' ' -f 3,4) ) neigh_state=$(ip -6 neigh show | grep -w $nexthop | tr -s ' ')
ping_prefix=ping6 ping_prefix=ping6
fi fi
if [[ -z "${neigh_state}" ]] || [[ "${neigh_state[1]}" == "INCOMPLETE" ]] || [[ "${neigh_state[1]}" == "FAILED" ]]; then # Check if there is an INCOMPLETE, FAILED, or STALE entry and try to resolve it again.
# STALE entries may be present if there is no traffic on a path. A far-end down event may not
# clear the STALE entry. Refresh the STALE entry to clear the table.
if [[ -z "${neigh_state}" ]] || [[ -n $(echo ${neigh_state} | grep 'INCOMPLETE\|FAILED\|STALE') ]]; then
interface="${STATIC_ROUTE_IFNAMES[i]}" interface="${STATIC_ROUTE_IFNAMES[i]}"
if [[ -z "$interface" ]]; then if [[ -z "$interface" ]]; then
# should never be here, handling just in case # should never be here, handling just in case
logger "ERR: arp_update: missing interface entry for static route $nexthop" logger "ERR: arp_update: missing interface entry for static route $nexthop"
interface=${neigh_state[0]} continue
fi fi
intf_up=$(ip link show $interface | grep "state UP") intf_up=$(ip link show $interface | grep "state UP")
if [[ -n "$intf_up" ]]; then if [[ -n "$intf_up" ]]; then
pingcmd="timeout 0.2 $ping_prefix -I ${interface} -n -q -i 0 -c 1 -W 1 $nexthop >/dev/null" pingcmd="timeout 0.2 $ping_prefix -I ${interface} -n -q -i 0 -c 1 -W 1 $nexthop >/dev/null"
eval $pingcmd eval $pingcmd
logger "arp_update: static route nexthop not resolved, pinging $nexthop on ${neigh_state[0]}" # STALE entries may appear more often, not logging to prevent periodic syslogs
if [[ -z $(echo ${neigh_state} | grep 'STALE') ]]; then
logger "arp_update: static route nexthop not resolved ($neigh_state), pinging $nexthop on $interface"
fi
fi fi
fi fi
done done
sleep 300 sleep 150
continue continue
fi fi
# find L3 interfaces which are UP, send ipv6 multicast pings # find L3 interfaces which are UP, send ipv6 multicast pings