diff --git a/netstack/src/scheme/netcfg/mod.rs b/netstack/src/scheme/netcfg/mod.rs
index a29721b3fc..08235b81e2 100644
--- a/netstack/src/scheme/netcfg/mod.rs
+++ b/netstack/src/scheme/netcfg/mod.rs
@@ -2,6 +2,11 @@
 mod nodes;
 mod notifier;
 
+/// Default interface name served at the `/ifaces/<name>` scheme path.
+/// Centralizes the historical `eth0` choice so future schema refactors
+/// can change it in one place. Follow-up work: runtime-keyed routing map.
+const DEFAULT_IFACE: &str = "eth0";
+
 use redox_scheme::{
     scheme::{register_scheme_inner, SchemeState, SchemeSync},
     CallerCtx, OpenResult, RequestKind, SignalBehavior, Socket,
@@ -513,11 +518,11 @@ fn mk_root_node(
             }
         },
         "ifaces" => {
-            "eth0" => {
+            DEFAULT_IFACE => {
                 "mac" => {
                     rw [iface, notifier, devices] (Option<EthernetAddress>, None)
                     || {
-                        match devices.borrow().get("eth0") {
+                        match devices.borrow().get(DEFAULT_IFACE) {
                             Some(dev) => {
                                 match dev.mac_address() {
                                     Some(addr) => format!("{addr}\n"),
@@ -542,7 +547,7 @@ fn mk_root_node(
                     }
                     |cur_value| {
                         if let Some(mac) = *cur_value {
-                            if let Some(dev) = devices.borrow_mut().get_mut("eth0") {
+                            if let Some(dev) = devices.borrow_mut().get_mut(DEFAULT_IFACE) {
                                 dev.set_mac_address(mac);
                                 notifier.borrow_mut().schedule_notify("ifaces/eth0/mac");
                             }
@@ -554,7 +559,7 @@ fn mk_root_node(
                     "list" => {
                         ro [devices]
                         || {
-                            let res = match devices.borrow().get("eth0") {
+                            let res = match devices.borrow().get(DEFAULT_IFACE) {
                                 Some(dev) => {
                                     match dev.ip_address() {
                                         Some(addr) => format!("{addr}\n"),
@@ -584,7 +589,7 @@ fn mk_root_node(
                         |cur_value| {
                             // TODO: Multiple IPs
                             if let Some(cidr) = cur_value.take() {
-                                if let Some(dev) = devices.borrow_mut().get_mut("eth0") {
+                                if let Some(dev) = devices.borrow_mut().get_mut(DEFAULT_IFACE) {
 
                                     let mut route_table = route_table.borrow_mut();
                                     if let Some(old_addr) = dev.ip_address() {
@@ -628,7 +633,7 @@ fn mk_root_node(
                 "arp" => {
                     "list" => {
                         ro [devices] || {
-                            match devices.borrow().get("eth0") {
+                            match devices.borrow().get(DEFAULT_IFACE) {
                                 Some(dev) => dev.arp_table(),
                                 None => "Device not found\n".into(),
                             }
@@ -636,7 +641,7 @@ fn mk_root_node(
                     },
                     "stats" => {
                         ro [devices] || {
-                            match devices.borrow().get("eth0") {
+                            match devices.borrow().get(DEFAULT_IFACE) {
                                 Some(dev) => dev.arp_stats(),
                                 None => "Device not found\n".into(),
                             }
@@ -654,7 +659,7 @@ fn mk_root_node(
                         }
                         |cur_value| {
                             *cur_value = None;
-                            if let Some(dev) = devices.borrow_mut().get_mut("eth0") {
+                            if let Some(dev) = devices.borrow_mut().get_mut(DEFAULT_IFACE) {
                                 dev.flush_arp();
                             }
                             Ok(())
@@ -683,7 +688,7 @@ fn mk_root_node(
                             if idx != 6 {
                                 return Err(SyscallError::new(syscall::EINVAL));
                             }
-                            if let Some(dev) = devices.borrow_mut().get_mut("eth0") {
+                            if let Some(dev) = devices.borrow_mut().get_mut(DEFAULT_IFACE) {
                                 dev.add_static_neighbor(ip, mac).map_err(|_| {
                                     SyscallError::new(syscall::EINVAL)
                                 })?;
@@ -699,7 +704,7 @@ fn mk_root_node(
                         |_cur_value, line| {
                             let ip: IpAddress = line.trim().parse()
                                 .map_err(|_| SyscallError::new(syscall::EINVAL))?;
-                            if let Some(dev) = devices.borrow_mut().get_mut("eth0") {
+                            if let Some(dev) = devices.borrow_mut().get_mut(DEFAULT_IFACE) {
                                 if !dev.remove_neighbor(ip) {
                                     return Err(SyscallError::new(syscall::ENOENT));
                                 }
@@ -713,7 +718,7 @@ fn mk_root_node(
                 },
                 "stats" => {
                     ro [devices] || {
-                        match devices.borrow().get("eth0") {
+                        match devices.borrow().get(DEFAULT_IFACE) {
                             Some(dev) => {
                                 let s = dev.statistics();
                                 format!("rx_bytes={} rx_packets={} tx_bytes={} tx_packets={} rx_errors={} tx_errors={} rx_dropped={} tx_dropped={} mtu={} link={}\n",
@@ -727,7 +732,7 @@ fn mk_root_node(
                 },
                 "link" => {
                     ro [devices] || {
-                        match devices.borrow().get("eth0") {
+                        match devices.borrow().get(DEFAULT_IFACE) {
                             Some(dev) => format!("{}\n", dev.link_state()),
                             None => "Device not found\n".into(),
                         }
@@ -736,7 +741,7 @@ fn mk_root_node(
                 "mtu" => {
                     rw [devices] (Option<usize>, None)
                     || {
-                        match devices.borrow().get("eth0") {
+                        match devices.borrow().get(DEFAULT_IFACE) {
                             Some(dev) => format!("{}\n", dev.mtu()),
                             None => "Device not found\n".into(),
                         }
@@ -744,7 +749,7 @@ fn mk_root_node(
                     |cur_value, line| {
                         let mtu = line.trim().parse::<usize>()
                             .map_err(|_| SyscallError::new(syscall::EINVAL))?;
-                        if let Some(dev) = devices.borrow_mut().get_mut("eth0") {
+                        if let Some(dev) = devices.borrow_mut().get_mut(DEFAULT_IFACE) {
                             dev.set_mtu(mtu);
                             *cur_value = Some(mtu);
                             Ok(())
@@ -757,14 +762,14 @@ fn mk_root_node(
                 "qdisc" => {
                     rw [devices] (Option<String>, None)
                     || {
-                        match devices.borrow().get("eth0") {
+                        match devices.borrow().get(DEFAULT_IFACE) {
                             Some(dev) => dev.qdisc_info(),
                             None => "Device not found\n".into(),
                         }
                     }
                     |cur_value, line| {
                         let kind = line.trim().to_string();
-                        if let Some(dev) = devices.borrow_mut().get_mut("eth0") {
+                        if let Some(dev) = devices.borrow_mut().get_mut(DEFAULT_IFACE) {
                             dev.set_qdisc(&kind).map_err(|e| {
                                 SyscallError::new(syscall::EINVAL)
                             })?;
@@ -779,7 +784,7 @@ fn mk_root_node(
                 "enabled" => {
                     rw [devices] (Option<bool>, None)
                     || {
-                        match devices.borrow().get("eth0") {
+                        match devices.borrow().get(DEFAULT_IFACE) {
                             Some(dev) => if dev.is_enabled() { "up\n".to_string() } else { "down\n".to_string() },
                             None => "Device not found\n".into(),
                         }
@@ -788,7 +793,7 @@ fn mk_root_node(
                         let s = line.trim();
                         match s {
                             "up" | "1" | "true" | "yes" | "on" => {
-                                if let Some(dev) = devices.borrow_mut().get_mut("eth0") {
+                                if let Some(dev) = devices.borrow_mut().get_mut(DEFAULT_IFACE) {
                                     dev.set_enabled(true);
                                     *cur_value = Some(true);
                                     Ok(())
@@ -797,7 +802,7 @@ fn mk_root_node(
                                 }
                             }
                             "down" | "0" | "false" | "no" | "off" => {
-                                if let Some(dev) = devices.borrow_mut().get_mut("eth0") {
+                                if let Some(dev) = devices.borrow_mut().get_mut(DEFAULT_IFACE) {
                                     dev.set_enabled(false);
                                     *cur_value = Some(false);
                                     Ok(())
@@ -813,7 +818,7 @@ fn mk_root_node(
                 "promiscuous" => {
                     rw [devices] (Option<bool>, None)
                     || {
-                        match devices.borrow().get("eth0") {
+                        match devices.borrow().get(DEFAULT_IFACE) {
                             Some(dev) => if dev.is_promiscuous() { "on\n".to_string() } else { "off\n".to_string() },
                             None => "Device not found\n".into(),
                         }
@@ -825,7 +830,7 @@ fn mk_root_node(
                             "off" | "0" | "false" | "no" => false,
                             _ => return Err(SyscallError::new(syscall::EINVAL)),
                         };
-                        if let Some(dev) = devices.borrow_mut().get_mut("eth0") {
+                        if let Some(dev) = devices.borrow_mut().get_mut(DEFAULT_IFACE) {
                             dev.set_promiscuous(enabled);
                             *cur_value = Some(enabled);
                             Ok(())