ip-stats: add page (#18796)

Co-authored-by: Managor <42655600+Managor@users.noreply.github.com>

pages/linux/ip-stats.md

@@ -0,0 +1,36 @@
+# ip stats
+
+> Manage and show interface statistics.
+> More information: <https://manned.org/ip-stats>.
+
+- Show all interface statistics across all network devices:
+
+`ip {{[st|stats]}}`
+
+- Show statistics for a specific network interface:
+
+`ip {{[st|stats]}} show dev {{network_interface}}`
+
+- Show link-layer statistics (same as `ip -statistics link show`):
+
+`ip {{[st|stats]}} show group link`
+
+- Show hardware offload statistics for all devices:
+
+`ip {{[st|stats]}} show group offload`
+
+- Show offload statistics for a specific interface:
+
+`ip {{[st|stats]}} show dev {{network_interface}} group offload`
+
+- Show a specific offload subgroup:
+
+`ip {{[st|stats]}} show dev {{network_interface}} group offload subgroup {{l3_stats|cpu_hit|hw_stats_info}}`
+
+- Show address-family specific statistics (e.g. MPLS):
+
+`ip {{[st|stats]}} show group afstats subgroup {{mpls}}`
+
+- Enable Layer 3 hardware statistics collection on a device:
+
+`ip {{[st|stats]}} set dev {{network_interface}} l3_stats on`