[SmartSwitch] DPU Management Traffic Forwarding script #19431
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,79 @@ | ||
| #!/bin/bash | ||
| #Script to control the DPU management traffic forwarding through the SmartSwitch | ||
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| command_name=$0 | ||
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| usage(){ | ||
| echo "Syntax: $command_name -e|--enable -d|--disable" | ||
| echo "Arguments:" | ||
| echo "-e Enable dpu management traffic forwarding" | ||
| echo "-d Disable dpu management traffic forwarding" | ||
| } | ||
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| add_rem_valid_iptable(){ | ||
| local op=$1 | ||
| local table=$2 | ||
| local chain=$3 | ||
| shift 3 | ||
| local rule="$@" | ||
| iptables -t $table -C $chain $rule &>/dev/null | ||
| local exit_status=$? | ||
| local exec_cond=0 | ||
| if [ "$op" = "enable" ]; then | ||
| exec_command="iptables -t $table -A $chain $rule" | ||
| [ "$exit_status" -eq 0 ] || exec_cond=1 # Execute if rule is currently not present | ||
| else | ||
| exec_command="iptables -t $table -D $chain $rule" | ||
| [ "$exit_status" -ne 0 ] || exec_cond=1 # Execute if rule is currently present | ||
| fi | ||
| if [ "$exec_cond" -eq 1 ]; then | ||
| eval "$exec_command" | ||
| else | ||
| echo "$exec_command not requried, will not be executed" | ||
| fi | ||
| } | ||
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| control_forwarding(){ | ||
| local op=$1 | ||
| local value=0 | ||
| if [ "$op" = "enable" ]; then | ||
| value=1 | ||
| fi | ||
| echo $value > /proc/sys/net/ipv4/ip_forward | ||
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| echo $value > /proc/sys/net/ipv4/conf/eth0/forwarding | ||
| } | ||
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| ctrl_dpu_forwarding(){ | ||
| local op=$1 | ||
| control_forwarding $op | ||
| add_rem_valid_iptable $op nat POSTROUTING -o ${mgmt_iface} -j MASQUERADE | ||
| add_rem_valid_iptable $op filter FORWARD -i ${mgmt_iface} -o ${midplane_iface} -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT | ||
| add_rem_valid_iptable $op filter FORWARD -i ${midplane_iface} -o ${mgmt_iface} -j ACCEPT | ||
| if [ "$op" = "enable" ]; then | ||
| echo "Enabled DPU management traffic Forwarding" | ||
| else | ||
| echo "Disabled DPU management traffic Forwarding" | ||
| fi | ||
| } | ||
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| mgmt_iface=eth0 | ||
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There was a problem hiding this comment. Is mgmt_iface eth0 common for all vendor SKUs? There was a problem hiding this comment. Yes in SONiC all vendors use |
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| midplane_iface=bridge-midplane | ||
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| if ! ifconfig "$midplane_iface" > /dev/null 2>&1; then | ||
| echo "$midplane_iface doesn't exist! Please run on smart switch system" | ||
| exit 1 | ||
| fi | ||
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| case $1 in | ||
| -e|--enable) | ||
| ctrl_dpu_forwarding enable | ||
| ;; | ||
| -d|--disable) | ||
| ctrl_dpu_forwarding disable | ||
| ;; | ||
| *) | ||
| echo "Incorrect Usage!" | ||
| usage | ||
| exit 1 | ||
| ;; | ||
| esac | ||
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Where is the trigger to execute this script with enable/disable option? Is this part of pmon?
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There is no trigger for this script, this is just a utility script which would be helpful for enabling DPU traffic to reach the internet in cases where connectivity is required, Example Usage:
SONiC to SONiC upgrade on the dpu can be performed easily if we enable DPU management traffic forwarding using this script, as the DPU can download the image directly, instead of first transferring the image to switch and then to DPU