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Cluster and storage switches

Migrate from a NetApp CN1610 cluster switch to a Cisco 9336C-FX2 cluster switch

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You can migrate NetApp CN1610 cluster switches for an ONTAP cluster to Cisco 9336C-FX2 cluster switches. This is a nondisruptive procedure.

Review requirements

You must be aware of certain configuration information, port connections and cabling requirements when you are replacing NetApp CN1610 cluster switches with Cisco 9336C-FX2 cluster switches. Also, verify the switch serial number to ensure that the correct switch is migrated.

Supported switches

The following cluster switches are supported:

  • NetApp CN1610

  • Cisco 9336C-FX2

For details of supported ports and their configurations, see the Hardware Universe.

What you'll need

Verify that your configuration meets the following requirements:

  • The existing cluster is correctly set up and functioning.

  • All cluster ports are in the up state to ensure nondisruptive operations.

  • The Cisco 9336C-FX2 cluster switches are configured and operating under the correct version of NX-OS installed with the reference configuration file (RCF) applied.

  • The existing cluster network configuration has the following:

    • A redundant and fully functional NetApp cluster using NetApp CN1610 switches.

    • Management connectivity and console access to both the NetApp CN1610 switches and the new switches.

    • All cluster LIFs in the up state with the cluster LIFs are on their home ports.

  • Some of the ports are configured on Cisco 9336C-FX2 switches to run at 40GbE or 100GbE.

  • You have planned, migrated, and documented 40GbE and 100GbE connectivity from nodes to Cisco 9336C-FX2 cluster switches.

Migrate the switches

About the examples

The examples in this procedure use the following switch and node nomenclature:

  • The existing CN1610 cluster switches are C1 and C2.

  • The new 9336C-FX2 cluster switches are cs1 and cs2.

  • The nodes are node1 and node2.

  • The cluster LIFs are node1_clus1 and node1_clus2 on node 1, and node2_clus1 and node2_clus2 on node 2 respectively.

  • The cluster1::*> prompt indicates the name of the cluster.

  • The cluster ports used in this procedure are e3a and e3b.

About this task

This procedure covers the following scenario:

  • Switch C2 is replaced by switch cs2 first.

    • Shut down the ports to the cluster nodes. All ports must be shut down simultaneously to avoid cluster instability.

      • All cluster LIFs fail over to the new switch cs2.

    • The cabling between the nodes and C2 is then disconnected from C2 and reconnected to cs2.

  • Switch C1 is replaced by switch cs1.

    • Shut down the ports to the cluster nodes. All ports must be shut down simultaneously to avoid cluster instability.

      • All cluster LIFs fail over to the new switch cs1.

    • The cabling between the nodes and C1 is then disconnected from C1 and reconnected to cs1.

Note No operational inter-switch link (ISL) is needed during this procedure. This is by design because RCF version changes can affect ISL connectivity temporarily. To ensure non-disruptive cluster operations, the following procedure fails over all of the cluster LIFs to the operational partner switch while performing the steps on the target switch.

Step 1: Prepare for migration

  1. If AutoSupport is enabled on this cluster, suppress automatic case creation by invoking an AutoSupport message:

    system node autosupport invoke -node * -type all -message MAINT=xh

    where x is the duration of the maintenance window in hours.

  2. Change the privilege level to advanced, entering y when prompted to continue:

    set -privilege advanced

    The advanced prompt (*>) appears.

  3. Disable auto-revert on the cluster LIFs.

    By disabling auto-revert for this procedure, the cluster LIFs will not automatically move back to their home port. They remain on the current port while it continues to be up and operational.

    network interface modify -vserver Cluster -lif * -auto-revert false

Step 2: Configure ports and cabling

  1. Determine the administrative or operational status for each cluster interface.

    Each port should display up for Link and healthy for Health Status.

    1. Display the network port attributes:

      network port show -ipspace Cluster

      Show example 
      cluster1::*> network port show -ipspace Cluster

Node: node1
                                                                       Ignore
                                                 Speed(Mbps)  Health   Health
Port      IPspace    Broadcast Domain Link MTU   Admin/Oper   Status   Status
--------- ---------- ---------------- ---- ----- ------------ -------- ------
e3a       Cluster    Cluster          up   9000  auto/100000  healthy  false
e3b       Cluster    Cluster          up   9000  auto/100000  healthy  false

Node: node2
                                                                       Ignore
                                                 Speed(Mbps)  Health   Health
Port      IPspace    Broadcast Domain Link MTU   Admin/Oper   Status   Status
--------- ---------- ---------------- ---- ----- ------------ -------- ------
e3a       Cluster    Cluster          up   9000  auto/100000  healthy  false
e3b       Cluster    Cluster          up   9000  auto/100000  healthy  false

    2. Display information about the LIFs and their designated home nodes:

      network interface show -vserver Cluster

      Each LIF should display up/up for Status Admin/Oper and true for Is Home.

      Show example 
      cluster1::*> network interface show -vserver Cluster

            Logical      Status     Network            Current     Current Is
Vserver     Interface    Admin/Oper Address/Mask       Node        Port    Home
----------- -----------  ---------- ------------------ ----------- ------- ----
Cluster
            node1_clus1  up/up      169.254.209.69/16  node1       e3a     true
            node1_clus2  up/up      169.254.49.125/16  node1       e3b     true
            node2_clus1  up/up      169.254.47.194/16  node2       e3a     true
            node2_clus2  up/up      169.254.19.183/16  node2       e3b     true

  2. The cluster ports on each node are connected to existing cluster switches in the following way (from the nodes' perspective) using the command:

    network device-discovery show -protocol

    Show example 
    cluster1::*> network device-discovery show -protocol cdp
Node/       Local  Discovered
Protocol    Port   Device (LLDP: ChassisID)  Interface         Platform
----------- ------ ------------------------- ----------------  ----------------
node1      /cdp
            e3a    C1 (6a:ad:4f:98:3b:3f)    0/1               -
            e3b    C2 (6a:ad:4f:98:4c:a4)    0/1               -
node2      /cdp
            e3a    C1 (6a:ad:4f:98:3b:3f)    0/2               -
            e3b    C2 (6a:ad:4f:98:4c:a4)    0/2               -

  3. The cluster ports and switches are connected in the following way (from the switches' perspective) using the command:

    show cdp neighbors

    Show example 
    C1# show cdp neighbors

Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater,
                  V - VoIP-Phone, D - Remotely-Managed-Device,
                  s - Supports-STP-Dispute

Device-ID             Local Intrfce Hldtme Capability  Platform         Port ID
node1                 Eth1/1        124    H           AFF-A400         e3a
node2                 Eth1/2        124    H           AFF-A400         e3a
C2                    0/13          179    S I s       CN1610           0/13
C2                    0/14          175    S I s       CN1610           0/14
C2                    0/15          179    S I s       CN1610           0/15
C2                    0/16          175    S I s       CN1610           0/16

C2# show cdp neighbors

Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater,
                  V - VoIP-Phone, D - Remotely-Managed-Device,
                  s - Supports-STP-Dispute


Device-ID             Local Intrfce Hldtme Capability  Platform         Port ID
node1                 Eth1/1        124    H           AFF-A400         e3b
node2                 Eth1/2        124    H           AFF-A400         e3b
C1                    0/13          175    S I s       CN1610           0/13
C1                    0/14          175    S I s       CN1610           0/14
C1                    0/15          175    S I s       CN1610           0/15
C1                    0/16          175    S I s       CN1610           0/16

  4. Verify the connectivity of the remote cluster interfaces:

ONTAP 9.9.1 and later

You can use the network interface check cluster-connectivity command to start an accessibility check for cluster connectivity and then display the details:

network interface check cluster-connectivity start and network interface check cluster-connectivity show

cluster1::*> network interface check cluster-connectivity start

NOTE: Wait for a number of seconds before running the show command to display the details.

cluster1::*> network interface check cluster-connectivity show
                                  Source           Destination      Packet
Node   Date                       LIF              LIF              Loss
------ -------------------------- ---------------- ---------------- -----------
node1
       3/5/2022 19:21:18 -06:00   node1_clus2      node2-clus1      none
       3/5/2022 19:21:20 -06:00   node1_clus2      node2_clus2      none
node2
       3/5/2022 19:21:18 -06:00   node2_clus2      node1_clus1      none
       3/5/2022 19:21:20 -06:00   node2_clus2      node1_clus2      none
All ONTAP releases

For all ONTAP releases, you can also use the cluster ping-cluster -node <name> command to check the connectivity:

cluster ping-cluster -node <name>

cluster1::*> cluster ping-cluster -node local
Host is node2
Getting addresses from network interface table...
Cluster node1_clus1 169.254.209.69 node1     e3a
Cluster node1_clus2 169.254.49.125 node1     e3b
Cluster node2_clus1 169.254.47.194 node2     e3a
Cluster node2_clus2 169.254.19.183 node2     e3b
Local = 169.254.47.194 169.254.19.183
Remote = 169.254.209.69 169.254.49.125
Cluster Vserver Id = 4294967293
Ping status:
....
Basic connectivity succeeds on 4 path(s)
Basic connectivity fails on 0 path(s)
................
Detected 9000 byte MTU on 4 path(s):
    Local 169.254.19.183 to Remote 169.254.209.69
    Local 169.254.19.183 to Remote 169.254.49.125
    Local 169.254.47.194 to Remote 169.254.209.69
    Local 169.254.47.194 to Remote 169.254.49.125
Larger than PMTU communication succeeds on 4 path(s)
RPC status:
2 paths up, 0 paths down (tcp check)
2 paths up, 0 paths down (udp check)

  1. On switch C2, shut down the ports connected to the cluster ports of the nodes in order to fail over the cluster LIFs.

    (C2)# configure
(C2)(Config)# interface 0/1-0/12
(C2)(Interface 0/1-0/12)# shutdown
(C2)(Interface 0/1-0/12)# exit
(C2)(Config)# exit

  2. Move the node cluster ports from the old switch C2 to the new switch cs2, using appropriate cabling supported by Cisco 9336C-FX2.

  3. Display the network port attributes:

    network port show -ipspace Cluster

    Show example 
    cluster1::*> network port show -ipspace Cluster

Node: node1
                                                                       Ignore
                                                 Speed(Mbps)  Health   Health
Port      IPspace    Broadcast Domain Link MTU   Admin/Oper   Status   Status
--------- ---------- ---------------- ---- ----- ------------ -------- ------
e3a       Cluster    Cluster          up   9000  auto/100000  healthy  false
e3b       Cluster    Cluster          up   9000  auto/100000  healthy  false

Node: node2
                                                                       Ignore
                                                 Speed(Mbps)  Health   Health
Port      IPspace    Broadcast Domain Link MTU   Admin/Oper   Status   Status
--------- ---------- ---------------- ---- ----- ------------ -------- ------
e3a       Cluster    Cluster          up   9000  auto/100000  healthy  false
e3b       Cluster    Cluster          up   9000  auto/100000  healthy  false

  4. The cluster ports on each node are now connected to cluster switches in the following way, from the nodes' perspective:

    network device-discovery show -protocol

    Show example 
    cluster1::*> network device-discovery show -protocol cdp

Node/       Local  Discovered
Protocol    Port   Device (LLDP: ChassisID)  Interface         Platform
----------- ------ ------------------------- ----------------  ----------------
node1      /cdp
            e3a    C1  (6a:ad:4f:98:3b:3f)   0/1               CN1610
            e3b    cs2 (b8:ce:f6:19:1a:7e)   Ethernet1/1/1     N9K-C9336C-FX2
node2      /cdp
            e3a    C1  (6a:ad:4f:98:3b:3f)   0/2               CN1610
            e3b    cs2 (b8:ce:f6:19:1b:96)   Ethernet1/1/2     N9K-C9336C-FX2

  5. On switch cs2, verify that all node cluster ports are up:

    network interface show -vserver Cluster

    Show example 
    cluster1::*> network interface show -vserver Cluster
            Logical      Status     Network            Current     Current Is
Vserver     Interfac     Admin/Oper Address/Mask       Node        Port    Home
----------- ------------ ---------- ------------------ ----------- ------- ----
Cluster
            node1_clus1  up/up      169.254.3.4/16     node1       e0b     false
            node1_clus2  up/up      169.254.3.5/16     node1       e0b     true
            node2_clus1  up/up      169.254.3.8/16     node2       e0b     false
            node2_clus2  up/up      169.254.3.9/16     node2       e0b     true

  6. On switch C1, shut down the ports connected to the cluster ports of the nodes in order to fail over the cluster LIFs.

    (C1)# configure
(C1)(Config)# interface 0/1-0/12
(C1)(Interface 0/1-0/12)# shutdown
(C1)(Interface 0/1-0/12)# exit
(C1)(Config)# exit

  7. Move the node cluster ports from the old switch C1 to the new switch cs1, using appropriate cabling supported by Cisco 9336C-FX2.

  8. Verify the final configuration of the cluster:

    network port show -ipspace Cluster

    Each port should display up for Link and healthy for Health Status.

    Show example 
    cluster1::*> network port show -ipspace Cluster

Node: node1
                                                                       Ignore
                                                 Speed(Mbps)  Health   Health
Port      IPspace    Broadcast Domain Link MTU   Admin/Oper   Status   Status
--------- ---------- ---------------- ---- ----- ------------ -------- ------
e3a       Cluster    Cluster          up   9000  auto/100000  healthy  false
e3b       Cluster    Cluster          up   9000  auto/100000  healthy  false

Node: node2
                                                                       Ignore
                                                 Speed(Mbps)  Health   Health
Port      IPspace    Broadcast Domain Link MTU   Admin/Oper   Status   Status
--------- ---------- ---------------- ---- ----- ------------ -------- ------
e3a       Cluster    Cluster          up   9000  auto/100000  healthy  false
e3b       Cluster    Cluster          up   9000  auto/100000  healthy  false

  9. The cluster ports on each node are now connected to cluster switches in the following way, from the nodes' perspective:

    network device-discovery show -protocol

    Show example 
    cluster1::*> network device-discovery show -protocol cdp

Node/       Local  Discovered
Protocol    Port   Device (LLDP: ChassisID)  Interface       Platform
----------- ------ ------------------------- --------------  ----------------
node1      /cdp
            e3a    cs1 (b8:ce:f6:19:1a:7e)   Ethernet1/1/1   N9K-C9336C-FX2
            e3b    cs2 (b8:ce:f6:19:1b:96)   Ethernet1/1/2   N9K-C9336C-FX2
node2      /cdp
            e3a    cs1 (b8:ce:f6:19:1a:7e)   Ethernet1/1/1   N9K-C9336C-FX2
            e3b    cs2 (b8:ce:f6:19:1b:96)   Ethernet1/1/2   N9K-C9336C-FX2

  10. On switches cs1 and cs2, verify that all node cluster ports are up:

    network port show -ipspace Cluster

    Show example 
    cluster1::*> network port show -ipspace Cluster

Node: node1
                                                                       Ignore
                                                  Speed(Mbps) Health   Health
Port      IPspace      Broadcast Domain Link MTU  Admin/Oper  Status   Status
--------- ------------ ---------------- ---- ---- ----------- -------- ------
e0a       Cluster      Cluster          up   9000  auto/10000 healthy  false
e0b       Cluster      Cluster          up   9000  auto/10000 healthy  false

Node: node2
                                                                       Ignore
                                                  Speed(Mbps) Health   Health
Port      IPspace      Broadcast Domain Link MTU  Admin/Oper  Status   Status
--------- ------------ ---------------- ---- ---- ----------- -------- ------
e0a       Cluster      Cluster          up   9000  auto/10000 healthy  false
e0b       Cluster      Cluster          up   9000  auto/10000 healthy  false

  11. Verify that both nodes each have one connection to each switch:

    network device-discovery show -protocol

    Show example

    The following example shows the appropriate results for both switches:

    cluster1::*> network device-discovery show -protocol cdp
Node/       Local  Discovered
Protocol    Port   Device (LLDP: ChassisID)  Interface       Platform
----------- ------ ------------------------- --------------  --------------
node1      /cdp
            e0a    cs1 (b8:ce:f6:19:1b:42)   Ethernet1/1/1   N9K-C9336C-FX2
            e0b    cs2 (b8:ce:f6:19:1b:96)   Ethernet1/1/2   N9K-C9336C-FX2

node2      /cdp
            e0a    cs1 (b8:ce:f6:19:1b:42)   Ethernet1/1/1   N9K-C9336C-FX2
            e0b    cs2 (b8:ce:f6:19:1b:96)   Ethernet1/1/2   N9K-C9336C-FX2

Step 3: Verify the configuration

  1. Enable auto-revert on the cluster LIFs:

    cluster1::*> network interface modify -vserver Cluster -lif * -auto-revert true

  2. Verify that all cluster network LIFs are back on their home ports:

    network interface show

    Show example 
    cluster1::*> network interface show -vserver Cluster

            Logical    Status     Network            Current       Current Is
Vserver     Interface  Admin/Oper Address/Mask       Node          Port    Home
----------- ---------- ---------- ------------------ ------------- ------- ----
Cluster
            node1_clus1  up/up    169.254.209.69/16  node1         e3a     true
            node1_clus2  up/up    169.254.49.125/16  node1         e3b     true
            node2_clus1  up/up    169.254.47.194/16  node2         e3a     true
            node2_clus2  up/up    169.254.19.183/16  node2         e3b     true

  3. Change the privilege level back to admin:

    set -privilege admin

  4. If you suppressed automatic case creation, re-enable it by invoking an AutoSupport message:

    system node autosupport invoke -node * -type all -message MAINT=END

What's next?

Configure switch health monitoring.