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Enable ARP Update Script for Packet based chassis. (#11465)

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What I did:

    Following changes done for packet based chassis:-
    1> Run arp_update on LC's to resolve static route nexthops over backend
    port-channel interfaces.
    2> On Supervisor make sure arp_update exit gracefully
This commit is contained in:
abdosi
2022-07-26 16:50:16 -07:00
committed by GitHub
parent 4d48e6063c
commit a380105461
3 changed files with 37 additions and 4 deletions
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28
files/scripts/arp_update
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@@ -12,6 +12,34 @@ ARP_UPDATE_VARS_FILE="/usr/share/sonic/templates/arp_update_vars.j2"
while /bin/true; do
# find L3 interfaces which are UP, send ipv6 multicast pings
ARP_UPDATE_VARS=$(sonic-cfggen -d -t ${ARP_UPDATE_VARS_FILE})
SWITCH_TYPE=$(echo $ARP_UPDATE_VARS | jq -r '.switch_type')
if [[ "$SWITCH_TYPE" == "chassis-packet" ]]; then
STATIC_ROUTE_NEXTHOPS=$(echo $ARP_UPDATE_VARS | jq -r '.static_route_nexthops')
# on supervisor/rp exit the script gracefully
if [[ -z "$STATIC_ROUTE_NEXTHOPS" ]]; then
logger "arp_update: exiting as no static route in packet based chassis"
exit 0
fi
for nexthop in $STATIC_ROUTE_NEXTHOPS; do
if [[ $nexthop == *"."* ]]; then
neigh_state=( $(ip -4 neigh show | grep $nexthop | tr -s ' ' | cut -d ' ' -f 3,4) )
ping_prefix=ping
elif [[ $nexthop == *":"* ]] ; then
neigh_state=( $(ip -6 neigh show | grep $nexthop | tr -s ' ' | cut -d ' ' -f 3,4) )
ping_prefix=ping6
fi
if [[ "${neigh_state[1]}" == "INCOMPLETE" ]] || [[ "${neigh_state[1]}" == "FAILED" ]]; then
pingcmd="timeout 0.2 $ping_prefix -I ${neigh_state[0]} -n -q -i 0 -c 1 -W 1 $nexthop >/dev/null"
eval $pingcmd
logger "arp_update: sttaic route nexthop not resolved, pinging $nexthop on ${neigh_state[0]}"
fi
done
sleep 300
continue
fi
# find L3 interfaces which are UP, send ipv6 multicast pings
INTERFACE=$(echo $ARP_UPDATE_VARS | jq -r '.interface')
PC_INTERFACE=$(echo $ARP_UPDATE_VARS | jq -r '.pc_interface')
VLAN_SUB_INTERFACE=$(echo $ARP_UPDATE_VARS | jq -r '.vlan_sub_interface')