diff --git a/nexus/src/db/datastore.rs b/nexus/src/db/datastore.rs
index 38c6b43d14f..3313598aeb2 100644
--- a/nexus/src/db/datastore.rs
+++ b/nexus/src/db/datastore.rs
@@ -239,7 +239,7 @@ impl DataStore {
                 .do_update()
                 .set((
                     dsl::time_modified.eq(Utc::now()),
-                    dsl::pool_id.eq(excluded(dsl::id)),
+                    dsl::pool_id.eq(excluded(dsl::pool_id)),
                     dsl::ip.eq(excluded(dsl::ip)),
                     dsl::port.eq(excluded(dsl::port)),
                     dsl::kind.eq(excluded(dsl::kind)),
diff --git a/nexus/src/nexus.rs b/nexus/src/nexus.rs
index ff352301657..0de77a45af8 100644
--- a/nexus/src/nexus.rs
+++ b/nexus/src/nexus.rs
@@ -286,7 +286,7 @@ impl Nexus {
         address: SocketAddr,
         kind: DatasetKind,
     ) -> Result<(), Error> {
-        info!(self.log, "upserting dataset"; "zpool_id" => zpool_id.to_string(), "dataset_id" => id.to_string());
+        info!(self.log, "upserting dataset"; "zpool_id" => zpool_id.to_string(), "dataset_id" => id.to_string(), "address" => address.to_string());
         let dataset = db::model::Dataset::new(id, zpool_id, address, kind);
         self.db_datastore.dataset_upsert(dataset).await?;
         Ok(())
diff --git a/nexus/test-utils/src/lib.rs b/nexus/test-utils/src/lib.rs
index dba247c3250..6be1f1e2c36 100644
--- a/nexus/test-utils/src/lib.rs
+++ b/nexus/test-utils/src/lib.rs
@@ -17,7 +17,7 @@ use oximeter_collector::Oximeter;
 use oximeter_producer::Server as ProducerServer;
 use slog::o;
 use slog::Logger;
-use std::net::SocketAddr;
+use std::net::{IpAddr, Ipv4Addr, SocketAddr};
 use std::path::Path;
 use std::time::Duration;
 use uuid::Uuid;
@@ -183,7 +183,10 @@ pub async fn start_sled_agent(
         },
         /* TODO-cleanup this is unused */
         log: ConfigLogging::StderrTerminal { level: ConfigLoggingLevel::Debug },
-        storage: sim::ConfigStorage::default(),
+        storage: sim::ConfigStorage {
+            zpools: vec![],
+            ip: IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)),
+        },
     };
 
     sim::Server::start(&config, &log).await
diff --git a/sled-agent/src/bin/sled-agent-sim.rs b/sled-agent/src/bin/sled-agent-sim.rs
index 286f27681ee..3cd7a84384f 100644
--- a/sled-agent/src/bin/sled-agent-sim.rs
+++ b/sled-agent/src/bin/sled-agent-sim.rs
@@ -78,6 +78,7 @@ async fn do_run() -> Result<(), CmdError> {
         storage: ConfigStorage {
             // Create 10 "virtual" U.2s, with 1 TB of storage.
             zpools: vec![ConfigZpool { size: 1 << 40 }; 10],
+            ip: args.sled_agent_addr.ip(),
         },
     };
 
diff --git a/sled-agent/src/sim/config.rs b/sled-agent/src/sim/config.rs
index 5926791793c..7c3f24266f8 100644
--- a/sled-agent/src/sim/config.rs
+++ b/sled-agent/src/sim/config.rs
@@ -10,7 +10,7 @@ use dropshot::ConfigDropshot;
 use dropshot::ConfigLogging;
 use serde::Deserialize;
 use serde::Serialize;
-use std::net::SocketAddr;
+use std::net::{IpAddr, SocketAddr};
 use uuid::Uuid;
 
 /**
@@ -43,9 +43,10 @@ pub struct ConfigZpool {
 }
 
 /// Configuration describing simulated storage.
-#[derive(Clone, Default, Debug, PartialEq, Deserialize, Serialize)]
+#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
 pub struct ConfigStorage {
     pub zpools: Vec<ConfigZpool>,
+    pub ip: IpAddr,
 }
 
 /**
diff --git a/sled-agent/src/sim/server.rs b/sled-agent/src/sim/server.rs
index c741cb1f4f3..6187f1ed50e 100644
--- a/sled-agent/src/sim/server.rs
+++ b/sled-agent/src/sim/server.rs
@@ -50,8 +50,7 @@ impl Server {
             "server" => config.id.clone().to_string()
         ));
         let sled_agent = Arc::new(SledAgent::new_simulated_with_id(
-            &config.id,
-            config.sim_mode,
+            &config,
             sa_log,
             Arc::clone(&nexus_client),
         ));
diff --git a/sled-agent/src/sim/sled_agent.rs b/sled-agent/src/sim/sled_agent.rs
index 71e0c692152..400df346ecd 100644
--- a/sled-agent/src/sim/sled_agent.rs
+++ b/sled-agent/src/sim/sled_agent.rs
@@ -19,7 +19,7 @@ use std::sync::Arc;
 use uuid::Uuid;
 
 use super::collection::SimCollection;
-use super::config::SimMode;
+use super::config::Config;
 use super::disk::SimDisk;
 use super::instance::SimInstance;
 use super::storage::{CrucibleData, Storage};
@@ -48,11 +48,12 @@ impl SledAgent {
      */
     /** Constructs a simulated SledAgent with the given uuid. */
     pub fn new_simulated_with_id(
-        id: &Uuid,
-        sim_mode: SimMode,
+        config: &Config,
         log: Logger,
         nexus_client: Arc<NexusClient>,
     ) -> SledAgent {
+        let id = config.id;
+        let sim_mode = config.sim_mode;
         info!(&log, "created simulated sled agent"; "sim_mode" => ?sim_mode);
 
         let instance_log = log.new(o!("kind" => "instances"));
@@ -71,8 +72,9 @@ impl SledAgent {
                 sim_mode,
             )),
             storage: Mutex::new(Storage::new(
-                *id,
+                id,
                 Arc::clone(&nexus_client),
+                config.storage.ip,
                 storage_log,
             )),
         }
diff --git a/sled-agent/src/sim/storage.rs b/sled-agent/src/sim/storage.rs
index 8e3bfbd5b6b..31f8b84293e 100644
--- a/sled-agent/src/sim/storage.rs
+++ b/sled-agent/src/sim/storage.rs
@@ -16,7 +16,7 @@ use nexus_client::types::{
 use nexus_client::Client as NexusClient;
 use slog::Logger;
 use std::collections::HashMap;
-use std::net::SocketAddr;
+use std::net::{IpAddr, SocketAddr};
 use std::str::FromStr;
 use std::sync::Arc;
 use uuid::Uuid;
@@ -137,10 +137,10 @@ pub struct CrucibleServer {
 }
 
 impl CrucibleServer {
-    fn new(log: &Logger) -> Self {
+    fn new(log: &Logger, crucible_ip: IpAddr) -> Self {
         let data = Arc::new(CrucibleData::new());
         let config = dropshot::ConfigDropshot {
-            bind_address: SocketAddr::new("127.0.0.1".parse().unwrap(), 0),
+            bind_address: SocketAddr::new(crucible_ip, 0),
             ..Default::default()
         };
         let dropshot_log = log
@@ -163,21 +163,22 @@ impl CrucibleServer {
     }
 }
 
-pub struct Zpool {
+struct Zpool {
     datasets: HashMap<Uuid, CrucibleServer>,
 }
 
 impl Zpool {
-    pub fn new() -> Self {
+    fn new() -> Self {
         Zpool { datasets: HashMap::new() }
     }
 
-    pub fn insert_dataset(
+    fn insert_dataset(
         &mut self,
         log: &Logger,
         id: Uuid,
+        crucible_ip: IpAddr,
     ) -> &CrucibleServer {
-        self.datasets.insert(id, CrucibleServer::new(log));
+        self.datasets.insert(id, CrucibleServer::new(log, crucible_ip));
         self.datasets
             .get(&id)
             .expect("Failed to get the dataset we just inserted")
@@ -190,15 +191,17 @@ pub struct Storage {
     nexus_client: Arc<NexusClient>,
     log: Logger,
     zpools: HashMap<Uuid, Zpool>,
+    crucible_ip: IpAddr,
 }
 
 impl Storage {
     pub fn new(
         sled_id: Uuid,
         nexus_client: Arc<NexusClient>,
+        crucible_ip: IpAddr,
         log: Logger,
     ) -> Self {
-        Self { sled_id, nexus_client, log, zpools: HashMap::new() }
+        Self { sled_id, nexus_client, log, zpools: HashMap::new(), crucible_ip }
     }
 
     /// Adds a Zpool to the sled's simulated storage and notifies Nexus.
@@ -221,7 +224,7 @@ impl Storage {
             .zpools
             .get_mut(&zpool_id)
             .expect("Zpool does not exist")
-            .insert_dataset(&self.log, dataset_id);
+            .insert_dataset(&self.log, dataset_id, self.crucible_ip);
 
         // Notify Nexus
         let request = DatasetPutRequest {