1.X version in AL2 Ipv 6 rules get deleted for secondary ENI

[joeysk2012]

When using multiple ENI with ipv6, the ipv6 rule gets deleted when using the code in the 1.x branch.
It seems likely this is being deleted by this code and
it would be possible to avoid this by using 2.x like is described here.

Customers are advised to switch to the latest 2.x version.
A workaround for this issue is to copy all of the ip6 rules to a separate table from 10000 + device number with 2000 + device number using a script and save it under /etc/dhcp/dhcpclient.d

PATTERN="/etc/sysconfig/network-scripts/route6-*"
shopt -s nullglob
files=( $PATTERN )

# Replace Table 10000 + device number with 20000 + device number, and turn it into a ip cmd
sed 's/table 1/table 2/g; s/^/ip -6 route replace /g' "${files[@]}" | while IFS= read -r cmd; do
    # Skip Empty Lines
    [[ -z "$cmd" ]] && continue
    eval "$cmd"
done

[joeysk2012]

Update:
Make sure to filter out unnecessary events and the existence of the file before executing this replacement.

  /usr/bin/logger --tag bmge "Starting due to reason ${reason:-<unset>} (iface=${INTERFACE:-<unset>})"

  # Only act on IPv6 lease events
  case "${reason:-}" in
    BOUND6|RENEW6|REBIND6) : ;;
    *) /usr/bin/logger --tag bmge "Skipping due to reason ${reason:-<unset>}"; return 0 ;;
  esac

  # No need to create rules for eth0
  if [[ "${INTERFACE:-}" == "eth0" || -z "${INTERFACE:-}" ]]; then
    /usr/bin/logger --tag bmge "Skipping due to interface ${INTERFACE:-<unset>}"
    return 0
  fi

  local route_file="/etc/sysconfig/network-scripts/route6-${INTERFACE}"
  if [[ ! -s "$route_file" ]]; then
    /usr/bin/logger --tag bmge "No route file: $route_file (nothing to do)"
    return 0
  fi