diff --git a/config/disk.go b/config/disk.go
index dd3ddf9e..ab54a91e 100644
--- a/config/disk.go
+++ b/config/disk.go
@@ -1,9 +1,7 @@
 package config
 
 import (
-	"encoding/json"
 	"io/ioutil"
-	"net"
 	"os"
 	"path"
 	"path/filepath"
@@ -127,30 +125,6 @@ func SaveInitCmdline(cmdLineArgs string) {
 	}
 }
 
-func SaveCNISubnet(subnet, filename string) {
-	if _, _, err := net.ParseCIDR(subnet); err != nil {
-		log.Errorf("Failed to parse system-docker subnet from cmdline: %v", err)
-	}
-	rBytes, err := ioutil.ReadFile(filename)
-	if err != nil {
-		log.Errorf("Failed to read from %s: %v", filename, err)
-	}
-	var data map[string]interface{}
-	if err = json.Unmarshal(rBytes, &data); err != nil {
-		log.Errorf("Failed to pasre json: %v", err)
-	}
-	ipam := data["ipam"].(map[string]interface{})
-	ipam["subnet"] = subnet
-	wBytes, err := json.MarshalIndent(data, "", "\t")
-	if err != nil {
-		log.Errorf("Failed to convert to bytes: %v", err)
-	}
-	log.Debugf("New cni bridge conf: %s", wBytes)
-	if err = ioutil.WriteFile(filename, wBytes, 0644); err != nil {
-		log.Errorf("Failed to write cni bridge file %s: %v", filename, err)
-	}
-}
-
 func CloudConfigDirFiles(dirPrefix string) []string {
 	cloudConfigDir := path.Join(dirPrefix, CloudConfigDir)
 
diff --git a/config/types.go b/config/types.go
index 3d144264..6ab92c41 100644
--- a/config/types.go
+++ b/config/types.go
@@ -47,9 +47,6 @@ const (
 	MetaDataFile           = "/var/lib/rancher/conf/metadata"
 	CloudConfigFile        = "/var/lib/rancher/conf/cloud-config.yml"
 	EtcResolvConfFile      = "/etc/resolv.conf"
-	CNIBridgeConfigFile    = "/etc/docker/cni/bridge.d/bridge.conf"
-
-	RKPDockerSysBridgeSubnet = "rancher.system_docker.subnet"
 )
 
 var (
diff --git a/init/init.go b/init/init.go
index ac0545c9..0fcf588c 100644
--- a/init/init.go
+++ b/init/init.go
@@ -14,7 +14,6 @@ import (
 
 	"github.com/docker/docker/pkg/mount"
 	"github.com/rancher/os/config"
-	"github.com/rancher/os/config/cmdline"
 	"github.com/rancher/os/dfs"
 	"github.com/rancher/os/log"
 	"github.com/rancher/os/util"
@@ -438,12 +437,6 @@ func RunInit() error {
 			log.FsReady()
 			log.Debugf("WARNING: switchroot and mount OEM2 phases not written to log file")
 
-			// update docker-sys bridge setting
-			if dockerSysSubnet := cmdline.GetCmdline(config.RKPDockerSysBridgeSubnet); dockerSysSubnet != "" {
-				val := dockerSysSubnet.(string)
-				config.SaveCNISubnet(val, config.CNIBridgeConfigFile)
-			}
-
 			return cfg, nil
 		}},
 		config.CfgFuncData{"b2d Env", func(cfg *config.CloudConfig) (*config.CloudConfig, error) {