From b5b2358bdf6f83f2c5690050f7b50ba454e0ceba Mon Sep 17 00:00:00 2001
From: Bilal Ismail <110652537+bilal-ismail@users.noreply.github.com>
Date: Wed, 24 Apr 2024 16:06:54 +0000
Subject: [PATCH] network interface state to UP on system boot for kdump

---
 build_debian.sh                                     |  4 ++++
 .../initramfs-tools/network-interface-preboot-init  | 13 +++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 files/initramfs-tools/network-interface-preboot-init

diff --git a/build_debian.sh b/build_debian.sh
index 8e6d799e8157..d1aada0aa911 100755
--- a/build_debian.sh
+++ b/build_debian.sh
@@ -210,6 +210,10 @@ sudo chmod +x $FILESYSTEM_ROOT/etc/initramfs-tools/hooks/setfacl
 sudo cp files/initramfs-tools/arista-net $FILESYSTEM_ROOT/etc/initramfs-tools/scripts/init-premount/arista-net
 sudo chmod +x $FILESYSTEM_ROOT/etc/initramfs-tools/scripts/init-premount/arista-net
 
+# Hook into initramfs: Initialize network interfaces on boot, useful for kdump kernel image
+sudo cp files/initramfs-tools/network-interface-preboot-init $FILESYSTEM_ROOT/etc/initramfs-tools/scripts/init-premount/network-interface-preboot-init
+sudo chmod +x $FILESYSTEM_ROOT/etc/initramfs-tools/scripts/init-premount/network-interface-preboot-init
+
 # Hook into initramfs: resize root partition after migration from another NOS to SONiC on Dell switches
 sudo cp files/initramfs-tools/resize-rootfs $FILESYSTEM_ROOT/etc/initramfs-tools/scripts/init-premount/resize-rootfs
 sudo chmod +x $FILESYSTEM_ROOT/etc/initramfs-tools/scripts/init-premount/resize-rootfs
diff --git a/files/initramfs-tools/network-interface-preboot-init b/files/initramfs-tools/network-interface-preboot-init
new file mode 100644
index 000000000000..15f9718aa1d4
--- /dev/null
+++ b/files/initramfs-tools/network-interface-preboot-init
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# Iterate over all detected network interfaces and configure them to use DHCP   
+interfaces=$(ip -o link show | awk -F': ' '{print $2}' | grep -E '^e')
+
+# Bring up each Ethernet interface
+for interface in $interfaces; do
+    ip link set dev $interface up
+    dhclient $interface
+done
+
+echo("Maigc for kdump: All interfaces have been intialized and DHCP is enabled. Can be verified by command,  \"ip addr\"")
+ip addr