Nexus 1000v - port-channel "refresh"

Hi All,
My question is, does anyone have any information on this 1000v command:
Nexus-1000v(config)# port-channel internal device-id table refresh
I am looking for a way for the port-channel interface to be automatically removed from the 1000v once the VEM has been deleted, currently the port-channel interface does not disappear when the VEM has been removed. This seems to be causing problems once the same VEM is re-added later on. Ports are getting sent into quarantine states and ending up in invalid states (eg. NoPortProfile state when there is actually a port-profile attached).
Anyway, if anyone can explain the above command or tell me how to find out more, it would be great, I can't find it documented anywhere and the context-sensitive help in the NXOS is vague at best.

Brendan,
I don't have much information on that command, but I do know it wont remove any unused port channels.  They have to be manually deleted if they're no longer needed.
The port Channel ID will remain even after a VEM is removed in case the assigned VEM comes back.  When a VEM is decommisioned permanently, I'll do a "no vem x" to also remove the Host entry for that VEM from the VSM.  This way the module slot # can be re-assigned to the next new VEM inserted.  After adding/removing VEMs just do a "show port-channel summary" to see any unused Port Channel IDs, and delete them.  It's a quick & painless task.
I would hope this wouldn't be a common issue - how often are you deleting/removing VEMs?
Regards,
Robert

Similar Messages

  • Nexus 1000v port-channels questions

    Hi,
    I’m running vCenter 4.1 and Nexus 1000v and about 30 ESX Hosts.
    I’m using one system uplink port profile for all 30 ESX Host; On each of the ESX host I have 2 NICs going to a Catalyst 3750 switch stack (Switch A), and another 2 NICs going to another Catalyst 3750 switch stack (Switch B).
    The Nexus is configured with the “sub-group CDP” command on the system uplink port profile like the following:
    port-profile type ethernet uplink
    vmware port-group
    switchport mode trunk
    switchport trunk allowed vlan 1,800,802,900,988-991,996-997,999
    switchport trunk native vlan 500
    mtu 1500
    channel-group auto mode on sub-group cdp
    no shutdown
    system vlan 988-989
    description System-Uplink
    state enabled
    And the port channel on the Catalyst 3750 are configured like the following:
    interface Port-channel11
    description ESX-10(Virtual Machine)
    switchport trunk encapsulation dot1q
    switchport trunk native vlan 500
    switchport trunk allowed vlan 800,802,900,988-991
    switchport mode trunk
    switchport nonegotiate
    spanning-tree portfast trunk
    end
    interface GigabitEthernet1/0/18
    description ESX-10(Virtual Machine)
    switchport trunk encapsulation dot1q
    switchport trunk native vlan 500
    switchport trunk allowed vlan 800,802,900,988-991
    switchport mode trunk
    switchport nonegotiate
    channel-group 11 mode on
    spanning-tree portfast trunk
    spanning-tree guard root
    end
    interface GigabitEthernet1/0/1
    description ESX-10(Virtual Machine)
    switchport trunk encapsulation dot1q
    switchport trunk native vlan 500
    switchport trunk allowed vlan 800,802,900,988-991
    switchport mode trunk
    switchport nonegotiate
    channel-group 11 mode on
    spanning-tree portfast trunk
    spanning-tree guard root
    end
    Now Cisco is telling me that I should be using MAC pinning when doing a trunk to two different stacks , and that each interface on 3750 should not be configured in a port-channel like above,  but should be configured as individual trunks.
    First question: Is the above statement correct, are my uplinks configured wrong?  Should they be configured individually in trunks instead of a port-channel?
    Second questions: If I need to add the MAC pinning configuration on my system uplink port-profile can I create a new system uplink port profile with the MAC pinning configuration and then move one ESX host (with no VM on them) one at a time to that new system uplink port profile? This way, I could migrate one ESX host at a time without outages to my VMs. Or is there an easier way to move 30 ESX hosts to a new system uplink profile with the MAC Pinning configuration.
    Thanks.

    Hello,
    From what I understood, you have the following setup:
         - Each ESX host has 4 NICS
         - 2 of them go to a 3750 stack and the other 2 go to a different 3750 stack
         - all 4 vmnics on the ESX host use the same Ethernet port-profile
              - this has 'channel-group auto mode on sub-group cdp'
         - The 2 interfaces on each 3750 stack are in a port-channel (just 'mode on')
    If yes, then this sort of a setup is correct. The only problem with this is the dependance on CDP. With CDP loss, the port-channels would go down.
    'mac-pinning' is the recommended option for this sort of a setup. You don't have to bundle the interfaces on the 3750 for this and these can be just regular trunk ports. If all your ports are on the same stack, then you can look at LACP. The CDP option would not be supported in the future releases. In fact, it is supposed to be removed from 4.2(1)SV1(2.1) but I still see the command available (ignore 4.2(1)SV1(4) next to it) - I'll follow up on this internally:
    http://www.cisco.com/en/US/docs/switches/datacenter/nexus1000/sw/4_2_1_s_v_2_1_1/interface/configuration/guide/b_Cisco_Nexus_1000V_Interface_Configuration_Guide_Release_4_2_1_SV_2_1_1_chapter_01.html
    For migrating, the best option would be as you suggested. Create a new port-profile with mac-pinning and move one host at a time. You can migrate VMs off the host before you change the port-profile and can remove the upstream port-channel config as well.
    Thanks,
    Shankar

  • Nexus 6K: Port-Channel Load-Balance

    Hi all,
    I configured "port-channel load-balance ethernet source-dest-mac" on Nexus 6001. But when I use "show run all | in load-balance", it displays module 1 and module 2 are still using source-dest-ip for port-channel load-balance. And for command "show port-channel load-balance" and "show port-channel load-balance forwarding-path interface", it still shows switch using MAC for hash algorithm. The NXOS is 6.0(2)N1(2a).
    Does anybody know:
    -  What is the function of "port-channel load-balance ethernet source-dest-ip module" and in which situation this command will be effective?
    -  It shows "port-channel load-balance ethernet source-dest-ip module" command for both module 1 and 2. Module 1 is N6K Supervisor and module 2 is 4xQSFP Ethernet Module. Is it possible to set different load-balance algorithm  to these 2 modules?   
    # show run all | in load-balance
    port-channel load-balance ethernet source-dest-mac
    port-channel load-balance ethernet source-dest-ip module 1
    port-channel load-balance ethernet source-dest-ip module 2
    # show port-channel load-balance
    Port Channel Load-Balancing Configuration:
    System: source-dest-mac
    Port Channel Load-Balancing Addresses Used Per-Protocol:
    Non-IP: source-dest-mac
    IP: source-dest-mac
    # show port-channel load-balance forwarding-path interface port-channel 30 vlan 150 src-ip 172.25.228.6 dst-ip 172.25.226.97
    Missing params will be substituted by 0's.
    Load-balance Algorithm on switch: source-dest-mac
    crc_hash: 977 Polynomial: CRC10b        Outgoing port id  Ethernet1/2
    Param(s) used to calculate load-balance:
            seed: 0x701
            dst-mac:  0000.0000.0000
            src-mac:  0000.0000.0000
    # show module
    Mod Ports Module-Type                         Model                  Status
    1   48    Norcal 64 Supervisor                N6K-C6001-64P-SUP      active *
    2   10    Nexus 4xQSFP Ethernet Module        N6K-C6001-M4Q          ok
    Mod  Sw              Hw      World-Wide-Name(s) (WWN)
    1    6.0(2)N2(3)     1.0     --
    2    6.0(2)N2(3)     1.0     --

    Hi all,
    I configured "port-channel load-balance ethernet source-dest-mac" on Nexus 6001. But when I use "show run all | in load-balance", it displays module 1 and module 2 are still using source-dest-ip for port-channel load-balance. And for command "show port-channel load-balance" and "show port-channel load-balance forwarding-path interface", it still shows switch using MAC for hash algorithm. The NXOS is 6.0(2)N1(2a).
    Does anybody know:
    -  What is the function of "port-channel load-balance ethernet source-dest-ip module" and in which situation this command will be effective?
    -  It shows "port-channel load-balance ethernet source-dest-ip module" command for both module 1 and 2. Module 1 is N6K Supervisor and module 2 is 4xQSFP Ethernet Module. Is it possible to set different load-balance algorithm  to these 2 modules?   
    # show run all | in load-balance
    port-channel load-balance ethernet source-dest-mac
    port-channel load-balance ethernet source-dest-ip module 1
    port-channel load-balance ethernet source-dest-ip module 2
    # show port-channel load-balance
    Port Channel Load-Balancing Configuration:
    System: source-dest-mac
    Port Channel Load-Balancing Addresses Used Per-Protocol:
    Non-IP: source-dest-mac
    IP: source-dest-mac
    # show port-channel load-balance forwarding-path interface port-channel 30 vlan 150 src-ip 172.25.228.6 dst-ip 172.25.226.97
    Missing params will be substituted by 0's.
    Load-balance Algorithm on switch: source-dest-mac
    crc_hash: 977 Polynomial: CRC10b        Outgoing port id  Ethernet1/2
    Param(s) used to calculate load-balance:
            seed: 0x701
            dst-mac:  0000.0000.0000
            src-mac:  0000.0000.0000
    # show module
    Mod Ports Module-Type                         Model                  Status
    1   48    Norcal 64 Supervisor                N6K-C6001-64P-SUP      active *
    2   10    Nexus 4xQSFP Ethernet Module        N6K-C6001-M4Q          ok
    Mod  Sw              Hw      World-Wide-Name(s) (WWN)
    1    6.0(2)N2(3)     1.0     --
    2    6.0(2)N2(3)     1.0     --

  • Nexus 5k port channel

    I want to create a port channel on my nexus switch which will be connected to my server.
    will someone please share with me the configuration for the same ?

    Hi,
    From server side create LACP port-channel and same from switch end.
    Nexus-SW
    =======
    interface Ethernet1/1-2
      description [connection to SRV-01]
      switchport
      switchport access vlan 10
      channel-group 20 mode active
      no shutdown
    interface port-channel20
      description [connection to SRV-01]
      switchport
      vpc 20
      switchport access vlan 10

  • Cisco Nexus 7010 Port-Channel

    Hi all,
    Hi have install a cisco nexus 7010 with the following modules :
    Mod  Ports  Module-Type                         Model              Status
    1    48     1000 Mbps Optical Ethernet XL Modul N7K-M148GS-11L     ok
    2    48     10/100/1000 Mbps Ethernet XL Module N7K-M148GT-11L     ok
    5    0      Supervisor Module-2                 N7K-SUP2           active *
    6    0      Supervisor Module-2                 N7K-SUP2           ha-standby
    9    48     10/100/1000 Mbps Ethernet XL Module N7K-M148GT-11L     ok
    10   48     1/10 Gbps Ethernet Module           N7K-F248XP-25E     ok
    After trying to build a port-channel with a 1G port on slot 1 and a 1G port on slot 10 i get a messague with incompatible port.
    Can any one tell me if its supported a port-channel with ports on the following modules :
    N7K-M148GS-11L
    N7K-F248XP-25E
    Thanks
    Patrício

    Hi Particio,
    The port-channel/vPC features require that all uplinks are connected to the same type of
    module. You can refer to the following document.
    http://www.cisco.com/en/US/partner/docs/switches/datacenter/sw/6_x/nx-os/interfaces/configuration/guide/if_portchannel.html#wp1888267
    HTH
    Regards
    Inayath
    *Plz rate if this is helpfull and mark as Answerd if this answerd your query.

  • FI 6248 Nexus 5548 Port-channel problem

                       Hi all
    I have a strange behavior between 2 FI and 2 nexus 5k configured as VPC , From a remote location and from my desktop I can ping odd ip and not even , from an other desktop in the same LAN the reverse, for both the tracert are good.
    The only solution is to shutdown  ports 1/1-2 on nexus A or FI A and in that case both desktops can ping both IP.
    All seems OK, no log error , no error on interface , I give below some commands
    What thing to know is that the nexus b has a L3 card , not the Nexus A , In fact I am waiting for a spare L3 daughter card.
    On both NexusI have such configuration and status
    interface port-channel201
      description ucs-Fab-a
      switchport mode trunk
      switchport trunk native vlan 999
      spanning-tree port type edge trunk
      vpc 201
    UCSM-PARIS-A(SSI153000ST)
                           Eth1/1        129    S I s     UCS-FI-6248UP Eth1/11
    UCSM-PARIS-A(SSI153000ST)
                           Eth1/2        174    S I s     UCS-FI-6248UP Eth1/12
    sh port-channel summary
    201   Po201(SU)   Eth      LACP      Eth1/1(P)    Eth1/2(P)
    sh mac address-table dynamic | i 1010
    * 1010     0025.b5c9.481e    dynamic   0          F    F  Po201
    * 1010     0025.b5c9.481f    dynamic   10         F    F  Po201
    sh ip arp
    10.203.136.21   00:01:05  0025.b5c9.481f  Vlan1010
    10.203.136.22   00:12:43  0025.b5c9.481e  Vlan1010
    On both FI A have such configuration and status
    terface port-channel201
      description U: Uplink
      switchport mode trunk
      pinning border
      switchport trunk native vlan 999
      switchport trunk allowed vlan 1,104,999,1010-1013,1020-1021,1500-1502,1510-151
    2,1550-1552,1560-1561,1600-1602,1610-1619
      speed 10000
    sh port-channel summary
    201   Po201(SU)   Eth      LACP      Eth1/9(P)    Eth1/10(P)   Eth1/11(P)
                                         Eth1/12(P)
    sh mac address-table dynamic
    * 1010     0025.b5c9.481e    dynamic   0          F    F  Po201
    * 1010     0025.b5c9.481f    dynamic   0          F    F  Po201
    sh cdp nei
    E2RTR001(SSI1608085E)  Eth1/9          120     S I s       N5K-C5548UP   Eth1/1
    E2RTR001(SSI1608085E)  Eth1/10         120     S I s       N5K-C5548UP   Eth1/2
    E2RTR002(SSI16080F17)  Eth1/11         151     R S I s     N5K-C5548UP   Eth1/1
    E2RTR002(SSI16080F17)  Eth1/12         136     R S I s     N5K-C5548UP   Eth1/2
    Any ideas, A configuration I forgot on FI ?
    Regards .

    In fact in the probem I described the path is Esx -> FAB A - > N5K-A (for layer 2) -> N5K-B (for L3) -> routing to the LAN
    And what you told me is that such configuration is not supported with VPC configuration , so I need to wait to receive the L3 card for the N5k-A. and check later if I have the same problem.
    thanks

  • Nexus 7010 port-channel to ESXi host running on Dell 910 and 810

    Was wondering has anyone had any experience with configuring a port-channel going back to ESXi host. My basic config is below. My issue is with what to put in the spanning-tree port type. Do I use normal, edge, network, or edge trunk?? Yes I have read most of the documentation out there but am just a lil confused. I just wanna be right.
    Also if anyone has any suggestions for the Vswitch config as well that would be much appreciated.
    int PO 201
    desc 01_6-1
    switchport mode trunk
      switchport access vlan 99
      switchport trunk native vlan 777
      switchport trunk allowed vlan 220,300,310,320-321,350,390-391
      switchport trunk allowed vlan add 420,777
      spanning-tree port type normal (what should go here)
      speed auto
      medium p2p
      no shutdown
    int e8/11
    desc 01_6-1
    channel-group 201 force
    int e10/11
    desc 01_6-1
    channel-group 201 force
    Thanks Guys

    Short answer: You could use spanning tree port type edge (trunk; if it's going to be a trunk). The vswitch isn't really a switch, it doesn't participate in spanning tree, so it's fine to make it an edge port.
    In my experience, many VMware guys don't like port channels as much as the other more host-centric NIC teaming methods. I think this has to do with ESX having a less than stellar implementation of etherchannel/LACP early on.

  • Nexus 7010 port-channel failed, not receiving any LACP BPDUs

    Hi every one,
    I'm having issue when trying to form LACP etherchannel links between N7k and server. Here's the setup:
    SERVER eth0-------N7K-1 Eth102/1/9
    SERVER eth1-------N7K-2 Eth102/1/9
    Configuration:
    N7K-1# sh run int eth102/1/9
    interface Ethernet102/1/9
      switchport
      switchport access vlan 204
      channel-group 321
      no shutdown
    N7K-1# sh run int po321
    interface port-channel321
      switchport
      switchport access vlan 204
      flowcontrol send on
      vpc 321
    N7K-2# sh run int eth102/1/9
    interface Ethernet102/1/9
      switchport
      switchport access vlan 204
      channel-group 321
      no shutdown
    N7K-2# sh run int po321
    interface port-channel321
      switchport
      switchport access vlan 204
      flowcontrol send on
      vpc 321
    vPC status
    id   Port   Status Consistency Reason                     Active vlans
    321  Po321  up     success     success                    204            
    Scenario 1-Etherchannel only without protocol
    Both links are up, problem only happened when link to N7K-2 restart. If link to N7K-1 restart no problem.
    Scenario 2-Etherchannel with LACP
    Both physical links NOT up. Logs showing this:
    2013 Aug 20 17:04:31 N7K-1 %ETHPORT-5-IF_DOWN_ADMIN_DOWN: Interface Ethernet102/1/9 is down (Administratively down)
    2013 Aug 20 17:04:32 N7K-1 %ETHPORT-5-IF_ADMIN_UP: Interface Ethernet102/1/9 is admin up .
    2013 Aug 20 17:04:35 N7K-1 %ETHPORT-5-SPEED: Interface Ethernet102/1/9, operational speed changed to 1 Gbps
    2013 Aug 20 17:04:35 N7K-1 %ETHPORT-5-IF_DUPLEX: Interface Ethernet102/1/9, operational duplex mode changed to Full
    2013 Aug 20 17:04:35 N7K-1 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet102/1/9, operational Receive Flow Control state changed to off
    2013 Aug 20 17:04:35 N7K-1 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet102/1/9, operational Transmit Flow Control state changed to on
    2013 Aug 20 17:04:35 N7K-1 %ETHPORT-5-SPEED: Interface port-channel321, operational speed changed to 1 Gbps
    2013 Aug 20 17:04:35 N7K-1 %ETHPORT-5-IF_DUPLEX: Interface port-channel321, operational duplex mode changed to Full
    2013 Aug 20 17:04:35 N7K-1 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface port-channel321, operational Receive Flow Control state changed to off
    2013 Aug 20 17:04:35 N7K-1 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface port-channel321, operational Transmit Flow Control state changed to on
    2013 Aug 20 17:04:55 N7K-1 %ETH_PORT_CHANNEL-5-PORT_SUSPENDED: Ethernet102/1/9: Ethernet102/1/9 is suspended
    2013 Aug 20 17:05:13 N7K-1 %LACP-FEX102-5-LACP_SUSPEND_INDIVIDUAL: LACP port Ethernet102/1/9(0x1f650200) of port-channel port-channel321(0x16000140) not receiving any LACP BPDUs  suspending (individual) port
    Scenario 3-Etherchannel with LACP to single 3750 switch
    All working fine, fail over success as expected.
    N7k is using NX-OS 6.0(4)
    Anyone facing this issue?

    Hi,
    I had had this problem before.
    Please, put the following command, if in your server side is using LACP:
    interface Ethernet102/1/9
      switchport
      switchport access vlan 204
      channel-group 321 mode active
      no shutdown
    N7K-1# sh run int po321
    interface port-channel321
      switchport
      switchport access vlan 204
      flowcontrol send on
      vpc 321
    N7K-2# sh run int eth102/1/9
    interface Ethernet102/1/9
      switchport
      switchport access vlan 204
      channel-group 321 mode active
      no shutdown
    N7K-2# sh run int po321
    interface port-channel321
      switchport
      switchport access vlan 204
      flowcontrol send on
      vpc 321

  • Nexus 1000V - port-profile for VSM and VEM on same host

    Hello,
    I'm trying to run the VSM and VEM on the same host. At first I connected the VSM to the vSwitch. This works fine. Then I tried to move the VSM behind its own VEM.
    I have 3 different VLANs for management, control and packet traffic. Is it possible to connect the three VSM interfaces (management, control and packet) to only one port-profile, in which these three different VLANs are configured in a trunk? Or do I have to configure for each interface a separate port-profile, if I am using three different VLANs?
    Thanks
    Tobias

    Hello,
        The VSM does not emit VLAN-tagged frames. Therefore, its ports need to be configured in access mode. If your Control and Packet VLANs are the same, you could use the same port profile for both.
    Please make sure that the access VLAN is a system VLAN for all three ports.
    On a related note, if the VSM's storage is on NFS or iSCSI, the storage vmknic needs a system port profile as well. More info at:
    http://www.cisco.com/en/US/docs/switches/datacenter/nexus1000/sw/4_0_4_s_v_1_3/getting_started/configuration/guide/n1000v_gsg_5vsm_behind_vem.html

  • Maximum number of interfaces in Port Channel on Nexus 5596

    Let me preface this by saying I am not a network expert....
    I noticed that our customer had configured a port channel on their Nexus 5596 comprised of 16 interfaces. I thought the maximum number of interfaces in a port channel was 8 interfaces? I see in the Nexus 7000 documentation that if you configure 16 interfaces, the remaining 8 will be in "hot standby." Is this the same behavior on the Nexus 5000 series?
    Thank you.

    Same behavior on the 5500 series and other Cisco switches like 3750, 3850 , etc..
    HTH

  • SAN Port-Channel between Nexus 5000 and Brocade 5100

    I have a Nexus 5000 running in NPV mode connected to a Brocade 5100 FC switch using two FC ports on a native FC module in the Nexus 5000. I would like to configure these two physical links as one logical link using a SAN Port-Channel/ISL-Trunk. An ISL trunking license is already installed on the Brocade 5100. The Nexus 5000 is running NX-OS 4.2(1), the Brocade 5100 Fabric OS 6.20. Does anybody know if this is a supported configuration? If so, how can this be configured on the Nexus 5000 and the Brocade 5100? Thank you in advance for any comments.
    Best regards,
    Florian

    I tried that and I could see the status light on the ports come on but it still showed not connected.
    I configured another switch (a 3560) with the same config and the same layout with the fiber and I got the connection up on it. I just cant seem to get it on the 4506, would it be something with the supervisor? Could it be wanting to use the 10gb port instead of the 1gb ports?

  • Firewall ports for Nexus 1000v

    hi all,
    There is firewall between nexus 1000v and vcentre and ESX 4.1i hosts.
    Could u pls advise which TCP/UDP ports to be opened for communication among Nexus1000v, vcentre and ESX hosts?
    Thank you very much!
    Best Regards,

    David,
    Between your VSM & VC you'll need TCP ports 80 & 443 open
    http://www.cisco.com/en/US/docs/switches/datacenter/nexus1000/sw/4_0_4_s_v_1_3/troubleshooting/configuration/guide/n1000v_trouble_5modules.html
    Between your VEM & VSM you'll need port this should be layer 2 so no ports need to be open.
    If you're using Layer 3 mode then enusre you have UDP 4785 open.
    http://www.ciscosystemsverified.biz/en/US/docs/switches/datacenter/nexus1000/sw/4_0_4_s_v_1_3/system_management/configuration/guide/n1000v_system_3domain.pdf
    Regards,
    Robert

  • Nexus port channel load balance

    Hi
    I just want to clarify one setting for the port channel load balance on Nexus 6k switch. If I use the load balance option source-dest-ip-only, will following four converstions be load balanced?
    10.10.10.1 -> 192.168.1.1
    10.10.10.2 -> 192.168.1.1
    10.10.10.1 -> 192.168.1.1
    10.10.10.1 -> 192.168.1.2
    Thanks. Leo

    Hi Leo,
    I think there may be typo in your question as I only see three conversations and not four. That aside I've not seen the Nexus port-channel load balancing sufficiently well documented to be able to give you the exact answer.
    In their configuration guides Cisco only include the following statement:
    Cisco NX-OS load balances traffic across all operational interfaces in a port channel by reducing part of the binary pattern formed from the addresses in the frame to a numerical value that selects one of the links in the channel.
    There is other documentation that states the load balancing algorithm uses a CRC-8 based polynomial, but as we don't know exactly which parts of the frame are used in the calculation, I don't see it's possible to calculate the answer and so derive the link that will be used for a given conversation.
    While I've not seen full documentation regarding the science used in the calculation, what Cisco have done is provide a command on the switch CLI that will allow you to determine which link of a port-channel will be used.
    If you run the command show port-channel load-balance forwarding-path interface port-channel vlan src-ip dst-ip then one of the parts of the output is the member link of the port-channel that will be used for that flow.
    You can find full details of the options for the show port-channel load-balance command in the command reference.
    One other point to remember is that the load balancing across a port-channel is unidirectional, and the hashing might be completely different for the return flow of a conversation. For example it is entirely possible that traffic from A to B could use one link of a port-channel, while the return traffic from B to A for the same conversation could use a different link.
    In general I would use the source-dest-port option for load balancing on the Nexus switches as this will obviously include the Layer-4 port numbers in the calculation, and so give you a better distribution of flows across all member links.
    Regards

  • Nexus - port-channel load balancing

    Port-channel   load balancing is a global command or interface command in Nexus switch?
    Thanks,
    Manu

    Hi,
    It's a global command; port-channel load-balance ethernet.
    You can find details in the Configuring Load Balancing Using Port Channels section of the Nexus 5500 Series NX-OS Interfaces Configuration Guide.
    Regards

  • Cisco Nexus 9300 Virtual Port Channel Support

    Hi,
    As I am new to Nexus 9300 and I was wondering if the switch may support virtual port channel (VPC)? I was wondering if there may be any feature matrix to compare it against the 9500/N7Ks/N5Ks
    Any suggestion is appreciated.
    Thanks.

    Hi Marvin,
    Appreciate for the information. I believe the customer is in the process of moving to ACI gradually however the setup I will be making will be classical ethernet setup which is similar to VSS setup whereby the N9300 would make use of VPC to connect to catalyst 3K/6K switch. I have illustrated it below for reference:
          Catalyst 6500 Non-VSS (Core)
          |----(VPC)---|
    N9300 ----- N9300   (Aggregation/Distribution)
          |----(VPC)---|
     Catalyst 3K switch (Access)
    Appreciate for clarrifiying the support for VPC for Nexus 9300 as I made a search on feature navigator for "Virtual Port Channel" which only listed the N7K platforms.
    Thanks.

Maybe you are looking for

  • Imac slow and Freezes PLEASE HELP!

    PLEASE HELP!!! Hello i have and imac G5 i bought it in about june of 2005... It was running very slow and always freezing and then i upgraded the RAM to 1gb and it started working much better. then i upgraded to OS Leopard andalso pro tools LE 7.4 an

  • Looking for a reveal

    Looking for a step-by-step how-to: I have a wide overhead shot of a brewery bottling line and detail shots of the steps in the bottling process. I'm trying to highlight those steps, with say, an spotlight of some sort that widens to reveal the detail

  • Multimedia Audio Controller, and Video Controller(VGA compatible) are missing on Windows XP(32Bit) SP3

    Hi. My Desktop Computer(Intel P 4, 512MB of RAM, and Graphics Card  with 256MB of RAM) Also, My Desktop Computer with P 4 doesn't have any access internet since there is no network adapter is installed. As a result, I would not be able to run the pc

  • Resolution, audio, alpha channel, and backup questions (newbie)

    Hello! Well, after a few weeks of fidgeting around with FCE, I've come up with quite a few questions: Image/Audio questions A. What is the best still image size for import to a NTSC DV movie? Is it the 720x480 px (3:2 aspect ratio) standard of the DV

  • HT204266 App Store card not working on iPod

    I live in Canada and purchased an App Store card at Walmart...how can I apply it to purchases on my iPod 4th generation?