docs: clarify uses of --direct-routing-device

--direct-routing-device is also used for BPF fast redirect. Clarify this in its usage doc. Signed-off-by: Kornilios Kourtis <kornilios@isovalent.com>
cilium · Oct 19, 2021 · c9d91ff · c9d91ff
1 parent 9b3a2dd
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diff --git a/Documentation/cmdref/cilium-agent.md b/Documentation/cmdref/cilium-agent.md
diff --git a/daemon/cmd/daemon_main.go b/daemon/cmd/daemon_main.go
@@ -275,7 +275,7 @@ func init() {
 	flags.StringSlice(option.Devices, []string{}, "List of devices facing cluster/external network (used for BPF NodePort, BPF masquerading and host firewall); supports '+' as wildcard in device name, e.g. 'eth+'")
 	option.BindEnv(option.Devices)
 
-	flags.String(option.DirectRoutingDevice, "", "Device name used to connect nodes in direct routing mode (required only by BPF NodePort; if empty, automatically set to a device with k8s InternalIP/ExternalIP or with a default route)")
+	flags.String(option.DirectRoutingDevice, "", "Device name used to connect nodes in direct routing mode (used by BPF NodePort, BPF fast redirect; if empty, automatically set to a device with k8s InternalIP/ExternalIP or with a default route)")
 	option.BindEnv(option.DirectRoutingDevice)
 
 	flags.String(option.LBDevInheritIPAddr, "", fmt.Sprintf("Device name which IP addr is inherited by devices running LB BPF program (--%s)", option.Devices))