no need to set accept_ra systcl for non-primary interfaces (#2708)

cmd/aws-vpc-cni-init/main.go

@@ -117,10 +117,7 @@ func configureIPv6Settings(procSys procsyswrapper.ProcSys, primaryIF string) err
 	// Check if IPv6 egress support is enabled in IPv4 cluster.
 	ipv6EgressEnabled := utils.GetBoolAsStringEnvVar(envEgressV6, defaultEnableIPv6Egress)
 	if enableIPv6 || ipv6EgressEnabled {
-		// For IPv6, the following sysctls are set:
-		// 1. forwarding defaults to 1
-		// 2. accept_ra defaults to 2
-		// 3. accept_redirects defaults to 1
+		// Enable IPv6 forwarding on all interfaces by default
 		entry := "net/ipv6/conf/all/forwarding"
 		err = procSys.Set(entry, "1")
 		if err != nil {
@@ -129,25 +126,6 @@ func configureIPv6Settings(procSys procsyswrapper.ProcSys, primaryIF string) err
 		val, _ := procSys.Get(entry)
 		log.Infof("Updated %s to %s", entry, val)
 
-		// accept_ra must be set to 2 so that RA routes are installed by the kernel on secondary ENIs
-		// For IPv6, this setting must be inherited by the trunk ENI. It must be set here as IPAMD does
-		// not have permission to set sysctl values.
-		entry = "net/ipv6/conf/default/accept_ra"
-		err = procSys.Set(entry, "2")
-		if err != nil {
-			return errors.Wrap(err, "Failed to set IPv6 accept Router Advertisements to 2")
-		}
-		val, _ = procSys.Get(entry)
-		log.Infof("Updated %s to %s", entry, val)
-
-		entry = "net/ipv6/conf/default/accept_redirects"
-		err = procSys.Set(entry, "1")
-		if err != nil {
-			return errors.Wrap(err, "Failed to enable IPv6 accept redirects")
-		}
-		val, _ = procSys.Get(entry)
-		log.Infof("Updated %s to %s", entry, val)
-
 		// For the primary ENI in IPv6, sysctls are set to:
 		// 1. forwarding=1
 		// 2. accept_ra=2

test/framework/resources/agent/traffic_tester.go

@@ -128,7 +128,7 @@ func (t *TrafficTest) TestTraffic() (float64, error) {
 		if err != nil {
 			return 0, fmt.Errorf("pod list %v validation failed %v", podList, err)
 		}
-		fmt.Fprintln(GinkgoWriter, "successfully validated the server pod list")
+		fmt.Fprintln(GinkgoWriter, "successfully validated the client pod list")
 	}
 
 	metricServerIP := metricServerPod.Status.PodIP