add a comment why 28 bytes a substracted

Signed-off-by: Marc Schöchlin <[email protected]>
SovereignCloudStack · Sep 13, 2024 · be2d397 · be2d397
1 parent a0a6e91
commit be2d397
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/...ronments/custom/roles/scs-landscape-nodes/files/scripts/scs_check_network_connectivity.sh b/...ronments/custom/roles/scs-landscape-nodes/files/scripts/scs_check_network_connectivity.sh
@@ -12,6 +12,7 @@ done < <(sudo vtysh -c "show ip bgp summary"|awk '/^enp/{if ($10 !~/[0-9][0-9]*/
 
 while read node
 do
+   # MTU 9100 - (8 bytes for ICMP headers and 20 bytes for Ethernet header)
    ping -M do -c ${1:-2} -s $((9100 - 28)) $node
    if [ "$?" != "0" ];then
       failed="PING:$node $failed"