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Cluster and storage switches

Replace CN1610 switch CL2 with 3232C switch C2

Contributors netapp-yvonneo
PDFs

Follow these steps to replace your CN1610 (CL2) switch with a Nexus 3232C (C2) switch.

Steps

  1. Shut down the cluster interconnect ports that are physically connected to switch CL2:

    network port modify -node node-name -port port-name -up-admin false

    Show example

    The following example shows the four cluster interconnect ports being shut down for node n1 and node n2:

    cluster::*> network port modify -node n1 -port e0b -up-admin false
cluster::*> network port modify -node n1 -port e0c -up-admin false
cluster::*> network port modify -node n2 -port e0b -up-admin false
cluster::*> network port modify -node n2 -port e0c -up-admin false

  2. 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
------ -------------------------- ---------------- ---------------- -----------
n1
       3/5/2022 19:21:18 -06:00   n1_clus2         n2-clus1         none
       3/5/2022 19:21:20 -06:00   n1_clus2         n2_clus2         none

n2
       3/5/2022 19:21:18 -06:00   n2_clus2         n1_clus1         none
       3/5/2022 19:21:20 -06:00   n2_clus2         n1_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 n1
Getting addresses from network interface table...
Cluster n1_clus1 n1       e0a    10.10.0.1
Cluster n1_clus2 n1       e0b    10.10.0.2
Cluster n1_clus3 n1       e0c    10.10.0.3
Cluster n1_clus4 n1       e0d    10.10.0.4
Cluster n2_clus1 n2       e0a    10.10.0.5
Cluster n2_clus2 n2       e0b    10.10.0.6
Cluster n2_clus3 n2       e0c    10.10.0.7
Cluster n2_clus4 n2       e0d    10.10.0.8
Local = 10.10.0.1 10.10.0.2 10.10.0.3 10.10.0.4
Remote = 10.10.0.5 10.10.0.6 10.10.0.7 10.10.0.8
Cluster Vserver Id = 4294967293 Ping status:
....
Basic connectivity succeeds on 16 path(s)
Basic connectivity fails on 0 path(s)
................
Detected 9000 byte MTU on 16 path(s):
    Local 10.10.0.1 to Remote 10.10.0.5
    Local 10.10.0.1 to Remote 10.10.0.6
    Local 10.10.0.1 to Remote 10.10.0.7
    Local 10.10.0.1 to Remote 10.10.0.8
    Local 10.10.0.2 to Remote 10.10.0.5
    Local 10.10.0.2 to Remote 10.10.0.6
    Local 10.10.0.2 to Remote 10.10.0.7
    Local 10.10.0.2 to Remote 10.10.0.8
    Local 10.10.0.3 to Remote 10.10.0.5
    Local 10.10.0.3 to Remote 10.10.0.6
    Local 10.10.0.3 to Remote 10.10.0.7
    Local 10.10.0.3 to Remote 10.10.0.8
    Local 10.10.0.4 to Remote 10.10.0.5
    Local 10.10.0.4 to Remote 10.10.0.6
    Local 10.10.0.4 to Remote 10.10.0.7
    Local 10.10.0.4 to Remote 10.10.0.8

Larger than PMTU communication succeeds on 16 path(s)
RPC status:
4 paths up, 0 paths down (tcp check)
4 paths up, 0 paths down (udp check)

  1. Shut down the ISL ports 13 through 16 on the active CN1610 switch CL1 using the appropriate command.

    For more information on Cisco commands, see the guides listed in the Cisco Nexus 3000 Series NX-OS Command References.

    Show example

    The following example shows ISL ports 13 through 16 being shut down on the CN1610 switch CL1:

    (CL1)# configure
(CL1)(Config)# interface 0/13-0/16
(CL1)(Interface 0/13-0/16)# shutdown
(CL1)(Interface 0/13-0/16)# exit
(CL1)(Config)# exit
(CL1)#

  2. Build a temporary ISL between CL1 and C2:

    For more information on Cisco commands, see the guides listed in the Cisco Nexus 3000 Series NX-OS Command References.

    Show example

    The following example shows a temporary ISL being built between CL1 (ports 13-16) and C2 (ports e1/24/1-4) using the Cisco switchport mode trunk command:

    C2# configure
C2(config)# interface port-channel 2
C2(config-if)# switchport mode trunk
C2(config-if)# spanning-tree port type network
C2(config-if)# mtu 9216
C2(config-if)# interface breakout module 1 port 24 map 10g-4x
C2(config)# interface e1/24/1-4
C2(config-if-range)# switchport mode trunk
C2(config-if-range)# mtu 9216
C2(config-if-range)# channel-group 2 mode active
C2(config-if-range)# exit
C2(config-if)# exit

  3. Remove the cables that are attached to the CN1610 switch CL2 on all the nodes.

    Using supported cabling, you must reconnect the disconnected ports on all the nodes to the Nexus 3232C switch C2.

  4. Remove four ISL cables from ports 13 to 16 on the CN1610 switch CL1.

    You must attach the appropriate Cisco QSFP28 to SFP+ breakout cables connecting port 1/24 on the new Cisco 3232C switch C2 to ports 13 to 16 on the existing CN1610 switch CL1.

    Note

    When reconnecting any cables to the new Cisco 3232C switch, the cables used must be either optical fiber or Cisco twinax cables.

  5. Make the ISL dynamic by configuring the ISL interface 3/1 on the active CN1610 switch to disable the static mode.

    This configuration matches with the ISL configuration on the 3232C switch C2 when the ISLs are brought up on both switches.

    For more information on Cisco commands, see the guides listed in the Cisco Nexus 3000 Series NX-OS Command References.

    Show example

    The following example shows the ISL interface 3/1 being configured to make the ISL dynamic:

    (CL1)# configure
(CL1)(Config)# interface 3/1
(CL1)(Interface 3/1)# no port-channel static
(CL1)(Interface 3/1)# exit
(CL1)(Config)# exit
(CL1)#

  6. Bring up ISLs 13 through 16 on the active CN1610 switch CL1.

    For more information on Cisco commands, see the guides listed in the Cisco Nexus 3000 Series NX-OS Command References.

    Show example

    The following example shows ISL ports 13 through 16 being brought up on the port-channel interface 3/1:

    (CL1)# configure
(CL1)(Config)# interface 0/13-0/16,3/1
(CL1)(Interface 0/13-0/16,3/1)# no shutdown
(CL1)(Interface 0/13-0/16,3/1)# exit
(CL1)(Config)# exit
(CL1)#

  7. Verify that the ISLs are up on the CN1610 switch CL1.

    The "Link State" should be Up, "Type" should be Dynamic, and the "Port Active" column should be True for ports 0/13 to 0/16.

    Show example

    The following example shows the ISLs being verified as up on the CN1610 switch CL1:

    (CL1)# show port-channel 3/1
Local Interface................................ 3/1
Channel Name................................... ISL-LAG
Link State..................................... Up
Admin Mode..................................... Enabled
Type........................................... Dynamic
Load Balance Option............................ 7
(Enhanced hashing mode)

Mbr    Device/       Port        Port
Ports  Timeout       Speed       Active
------ ------------- ----------  -------
0/13   actor/long    10 Gb Full  True
       partner/long
0/14   actor/long    10 Gb Full  True
       partner/long
0/15   actor/long    10 Gb Full  True
       partner/long
0/16   actor/long    10 Gb Full  True
       partner/long

  8. Verify that the ISLs are up on the 3232C switch C2:

    show port-channel summary

    For more information on Cisco commands, see the guides listed in the Cisco Nexus 3000 Series NX-OS Command References.

    Ports Eth1/24/1 through Eth1/24/4 should indicate (P), meaning that all four ISL ports are up in the port channel. Eth1/31 and Eth1/32 should indicate (D) as they are not connected.

    Show example

    The following example shows the ISLs being verified as up on the 3232C switch C2:

    C2# show port-channel summary

Flags:  D - Down        P - Up in port-channel (members)
        I - Individual  H - Hot-standby (LACP only)
        s - Suspended   r - Module-removed
        S - Switched    R - Routed
        U - Up (port-channel)
        M - Not in use. Min-links not met
------------------------------------------------------------------------------
Group Port-       Type     Protocol  Member Ports
      Channel
------------------------------------------------------------------------------
1	    Po1(SU)     Eth      LACP      Eth1/31(D)   Eth1/32(D)
2	    Po2(SU)     Eth      LACP      Eth1/24/1(P) Eth1/24/2(P) Eth1/24/3(P)
                                     Eth1/24/4(P)

  9. Bring up all of the cluster interconnect ports that are connected to the 3232C switch C2 on all of the nodes:

    network port modify -node node-name -port port-name -up-admin true

    Show example

    The following example shows how to bring up the cluster interconnect ports connected to the 3232C switch C2:

    cluster::*> network port modify -node n1 -port e0b -up-admin true
cluster::*> network port modify -node n1 -port e0c -up-admin true
cluster::*> network port modify -node n2 -port e0b -up-admin true
cluster::*> network port modify -node n2 -port e0c -up-admin true

  10. Revert all of the migrated cluster interconnect LIFs that are connected to C2 on all of the nodes:

    network interface revert -vserver cluster -lif lif-name

    Show example 
    cluster::*> network interface revert -vserver cluster -lif n1_clus2
cluster::*> network interface revert -vserver cluster -lif n1_clus3
cluster::*> network interface revert -vserver cluster -lif n2_clus2
cluster::*> network interface revert -vserver cluster -lif n2_clus3

  11. Verify that all of the cluster interconnect ports are reverted to their home ports:

    network interface show -role cluster

    Show example

    The following example shows that the LIFs on clus2 are reverted to their home ports; the LIFs are successfully reverted if the ports in the "Current Port" column have a status of true in the "Is Home" column. If the "Is Home" value is false, then the LIF is not reverted.

    cluster::*> network interface show -role cluster
(network interface show)
         Logical    Status      Network        Current  Current  Is
Vserver  Interface  Admin/Oper  Address/Mask   Node     Port     Home
-------- ---------- ----------- -------------- -------- -------- -----
Cluster
         n1_clus1   up/up       10.10.0.1/24   n1       e0a      true
         n1_clus2   up/up       10.10.0.2/24   n1       e0b      true
         n1_clus3   up/up       10.10.0.3/24   n1       e0c      true
         n1_clus4   up/up       10.10.0.4/24   n1       e0d      true
         n2_clus1   up/up       10.10.0.5/24   n2       e0a      true
         n2_clus2   up/up       10.10.0.6/24   n2       e0b      true
         n2_clus3   up/up       10.10.0.7/24   n2       e0c      true
         n2_clus4   up/up       10.10.0.8/24   n2       e0d      true

8 entries were displayed.

  12. Verify that all of the cluster ports are connected:

    network port show -role cluster

    Show example

    The following example shows the output verifying all of the cluster interconnects are up:

    cluster::*> network port show -role cluster
       (network port show)

Node: n1
                Broadcast               Speed (Mbps) Health   Ignore
Port  IPspace   Domain      Link  MTU   Admin/Open   Status   Health Status
----- --------- ----------- ----- ----- ------------ -------- -------------
e0a   cluster   cluster     up    9000  auto/10000     -
e0b   cluster   cluster     up    9000  auto/10000     -
e0c   cluster   cluster     up    9000  auto/10000     -        -
e0d   cluster   cluster     up    9000  auto/10000     -        -
Node: n2

                Broadcast               Speed (Mbps) Health   Ignore
Port  IPspace   Domain      Link  MTU   Admin/Open   Status   Health Status
----- --------- ----------- ----- ----- ------------ -------- -------------
e0a   cluster   cluster     up    9000  auto/10000     -
e0b   cluster   cluster     up    9000  auto/10000     -
e0c   cluster   cluster     up    9000  auto/10000     -
e0d   cluster   cluster     up    9000  auto/10000     -

8 entries were displayed.

  13. 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
------ -------------------------- ---------------- ---------------- -----------
n1
       3/5/2022 19:21:18 -06:00   n1_clus2         n2-clus1         none
       3/5/2022 19:21:20 -06:00   n1_clus2         n2_clus2         none

n2
       3/5/2022 19:21:18 -06:00   n2_clus2         n1_clus1         none
       3/5/2022 19:21:20 -06:00   n2_clus2         n1_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 n1
Getting addresses from network interface table...
Cluster n1_clus1 n1       e0a    10.10.0.1
Cluster n1_clus2 n1       e0b    10.10.0.2
Cluster n1_clus3 n1       e0c    10.10.0.3
Cluster n1_clus4 n1       e0d    10.10.0.4
Cluster n2_clus1 n2       e0a    10.10.0.5
Cluster n2_clus2 n2       e0b    10.10.0.6
Cluster n2_clus3 n2       e0c    10.10.0.7
Cluster n2_clus4 n2       e0d    10.10.0.8
Local = 10.10.0.1 10.10.0.2 10.10.0.3 10.10.0.4
Remote = 10.10.0.5 10.10.0.6 10.10.0.7 10.10.0.8
Cluster Vserver Id = 4294967293 Ping status:
....
Basic connectivity succeeds on 16 path(s)
Basic connectivity fails on 0 path(s)
................
Detected 9000 byte MTU on 16 path(s):
    Local 10.10.0.1 to Remote 10.10.0.5
    Local 10.10.0.1 to Remote 10.10.0.6
    Local 10.10.0.1 to Remote 10.10.0.7
    Local 10.10.0.1 to Remote 10.10.0.8
    Local 10.10.0.2 to Remote 10.10.0.5
    Local 10.10.0.2 to Remote 10.10.0.6
    Local 10.10.0.2 to Remote 10.10.0.7
    Local 10.10.0.2 to Remote 10.10.0.8
    Local 10.10.0.3 to Remote 10.10.0.5
    Local 10.10.0.3 to Remote 10.10.0.6
    Local 10.10.0.3 to Remote 10.10.0.7
    Local 10.10.0.3 to Remote 10.10.0.8
    Local 10.10.0.4 to Remote 10.10.0.5
    Local 10.10.0.4 to Remote 10.10.0.6
    Local 10.10.0.4 to Remote 10.10.0.7
    Local 10.10.0.4 to Remote 10.10.0.8

Larger than PMTU communication succeeds on 16 path(s)
RPC status:
4 paths up, 0 paths down (tcp check)
4 paths up, 0 paths down (udp check)

  1. Migrate the LIFs that are associated with the first CN1610 switch CL1:

    network interface migrate -vserver cluster -lif lif-name -source-node node-name

    Show example

    You must migrate each cluster LIF individually to the appropriate cluster ports hosted on cluster switch C2 as shown in the following example:

    cluster::*> network interface migrate -vserver cluster -lif n1_clus1 -source-node n1
-destination-node n1 -destination-port e0b
cluster::*> network interface migrate -vserver cluster -lif n1_clus4 -source-node n1
-destination-node n1 -destination-port e0c
cluster::*> network interface migrate -vserver cluster -lif n2_clus1 -source-node n2
-destination-node n2 -destination-port e0b
cluster::*> network interface migrate -vserver cluster -lif n2_clus4 -source-node n2
-destination-node n2 -destination-port e0c
What's next?

Replace CN1610 switch CL1 with 3232C switch C1.