Enabling ECN marking on Cisco nexus 3064

Hi,
I have a requirement to enable ECN marking on CIsco nexus 3064 switch. ECT(0) traffic is being switched.
Tried the below configs, But not quite helping.
==================================
n# sh policy-map type network-qos nq_pm_1
Type network-qos policy-maps
===============================
policy-map type network-qos nq_pm_1
    class type network-qos nq_cm_1
      mtu 1500
      congestion-control random-detect ecn
    class type network-qos class-default
      mtu 1500
     congestion-control random-detect ecn
n# sh run | beg "system qos"
system qos
service-policy type qos input iscsi
service-policy type network-qos nq_pm_1
n# sh policy-map type queuing pqu
Type queuing policy-maps
========================
policy-map type queuing pqu
    class type queuing cqu
      random-detect minimum-threshold 10 packets maximum-threshold 350 packets
      bandwidth percent 50
    class type queuing class-default
      bandwidth percent 50
      random-detect minimum-threshold 5 packets maximum-threshold 5 packets
n# sh run int e1/21
!Command: show running-config interface Ethernet1/21
!Time: Tue Apr 29 09:04:35 2014
version 5.0(3)U5(1b)
interface Ethernet1/21
no switchport
service-policy type queuing output pqu
ip address 15.0.20.1/24
what could possibly be missing?
Thanks
Jose.

Duplicate post.
Go here: http://supportforums.cisco.com/discussion/12190426/ecn-marking-cisco-nexus-3064

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Ask the Expert: Different Flavors and Design with vPC on Cisco Nexus 5000 Series Switches

Welcome to the Cisco® Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about Cisco® NX-OS.
The biggest limitation to a classic port channel communication is that the port channel operates only between two devices. To overcome this limitation, Cisco NX-OS has a technology called virtual port channel (vPC). A pair of switches acting as a vPC peer endpoint looks like a single logical entity to port channel attached devices. The two devices that act as the logical port channel endpoint are actually two separate devices. This setup has the benefits of hardware redundancy combined with the benefits offered by a port channel, for example, loop management.
vPC technology is the main factor for success of Cisco Nexus® data center switches such as the Cisco Nexus 5000 Series, Nexus 7000 Series, and Nexus 2000 Series Switches.
This event is focused on discussing all possible types of vPC along-with best practices, failure scenarios, Cisco Technical Assistance Center (TAC) recommendations and troubleshooting
Vishal Mehta is a customer support engineer for the Cisco Data Center Server Virtualization Technical Assistance Center (TAC) team based in San Jose, California. He has been working in TAC for the past 3 years with a primary focus on data center technologies, such as the Cisco Nexus 5000 Series Switches, Cisco Unified Computing System™ (Cisco UCS®), Cisco Nexus 1000V Switch, and virtualization. He presented at Cisco Live in Orlando 2013 and will present at Cisco Live Milan 2014 (BRKCOM-3003, BRKDCT-3444, and LABDCT-2333). He holds a master’s degree from Rutgers University in electrical and computer engineering and has CCIE® certification (number 37139) in routing and switching, and service provider.
Nimit Pathak is a customer support engineer for the Cisco Data Center Server Virtualization TAC team based in San Jose, California, with primary focus on data center technologies, such as Cisco UCS, the Cisco Nexus 1000v Switch, and virtualization. Nimit holds a master's degree in electrical engineering from Bridgeport University, has CCNA® and CCNP® Nimit is also working on a Cisco data center CCIE® certification While also pursuing an MBA degree from Santa Clara University.
Remember to use the rating system to let Vishal and Nimit know if you have received an adequate response.
Because of the volume expected during this event, Vishal and Nimit might not be able to answer every question. Remember that you can continue the conversation in the Network Infrastructure Community, under the subcommunity LAN, Switching & Routing, shortly after the event. This event lasts through August 29, 2014. Visit this forum often to view responses to your questions and the questions of other Cisco Support Community members.

Hello Gustavo
Please see my responses to your questions:
Yes almost all routing protocols use Multicast to establish adjacencies. We are dealing with two different type of traffic –Control Plane and Data Plane.
Control Plane: To establish Routing adjacency, the first packet (hello) is punted to CPU. So in the case of triangle routed VPC topology as specified on the Operations Guide Link, multicast for routing adjacencies will work. The hellos packets will be exchanged across all 3 routers and adjacency will be formed over VPC links
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/operations/n5k_L3_w_vpc_5500platform.html#wp999181
Now for Data Plane we have two types of traffic – Unicast and Multicast.
The Unicast traffic will not have any forwarding issues, but because the Layer 3 ECMP and port channel run independent hash calculations there is a possibility that when the Layer 3 ECMP chooses N5k-1 as the Layer 3 next hop for a destination address while the port channel hashing chooses the physical link toward N5k-2. In this scenario,N5k-2 receives packets from R with the N5k-1 MAC as the destination MAC.
Sending traffic over the peer-link to the correct gateway is acceptable for data forwarding, but it is suboptimal because it makes traffic cross the peer link when the traffic could be routed directly.
For that topology, Multicast Traffic might have complete traffic loss due to the fact that when a PIM router is connected to Cisco Nexus 5500 Platform switches in a vPC topology, the PIM join messages are received only by one switch. The multicast data might be received by the other switch.
The Loop avoidance works little different across Nexus 5000 and Nexus 7000.
Similarity: For both products, loop avoidance is possible due to VSL bit
The VSL bit is set in the DBUS header internal to the Nexus.
It is not something that is set in the ethernet packet that can be identified. The VSL bit is set on the port asic for the port used for the vPC peer link, so if you have Nexus A and Nexus B configured for vPC and a packet leaves Nexus A towards Nexus B, Nexus B will set the VSL bit on the ingress port ASIC. This is not something that would traverse the peer link.
This mechanism is used for loop prevention within the chassis.
The idea being that if the port came in the peer link from the vPC peer, the system makes the assumption that the vPC peer would have forwarded this packet out the vPC-enabled port-channels towards the end device, so the egress vpc interface's port-asic will filter the packet on egress.
Differences: In Nexus 5000 when it has to do L3-to-L2 lookup for forwarding traffic, the VSL bit is cleared and so the traffic is not dropped as compared to Nexus 7000 and Nexus 3000.
It still does loop prevention but the L3-to-L2 lookup is different in Nexus 5000 and Nexus 7000.
For more details please see below presentation:
https://supportforums.cisco.com/sites/default/files/session_14-_nexus.pdf
DCI Scenario: If 2 pairs are of Nexus 5000 then separation of L3/L2 links is not needed.
But in most scenarios I have seen pair of Nexus 5000 with pair of Nexus 7000 over DCI or 2 pairs of Nexus 7000 over DCI. If Nexus 7000 are used then L3 and L2 links are required for sure as mentioned on above presentation link.
Let us know if you have further questions.
Thanks,
Vishal

Cisco Nexus 5K + Micrososft Radius for Admin Authentication

Hi,
I have cisco 3750 switches configured to use MS radius for administrator authention. however, now I would like to add our cisco nexus switches to MS radius as well so that administrators are authenticated against the Microsoft radius for admin authention.
I tried it earlier but it won't accept 3750 commands.. Can you please help with me with a configuration example please that I can follow?
the commands I have used on 3750 are as follows:
aaa new-model
aaa authentication login vtylogin group radius local
aaa authentication login conlogin group radius local
aaa authentication enable default group radius enable
aaa authorization console
aaa authorization exec vtylogin group radius local
aaa authorization exec conlogin group radius local
radius-server host x.x.x.x key SECRETE
line con 0
exec-timeout 5 0
authorization exec conlogin
logging synchronous
login authentication conlogin
line vty 0 4
exec-timeout 0 0
authorization exec vtylogin
login authentication vtylogin
transport input ssh
line vty 5 15
exec-timeout 0 0
authorization exec vtylogin
login authentication vtylogin
transport input ssh

I have never done this before with ACS but not with NPS. However, you are in the right path. Nexus uses NX-OS which is different in some regards to regular IOS. One of those differences is the AAA setup. In NX-OS you assign users to roles. So for full access you will need to return the following attributes from your Radius server:
Attribute: cisco-av-pair
Requirement: Mandatory
Value: shell:roles*"network-admin vdc-admin"
For more information take a look at this link:
http://www.cisco.com/c/en/us/support/docs/security/secure-access-control-system/115925-nexus-integration-acs-00.html
Hope this helps
Thank you for rating helpful posts!

Nexus 3064 at the aggregation layer - thoughts?

Folks,
About to start a new project and looking at 10G ToR and considering options for aggregation. Initially will have 10 racks but should be able to scale up to 4x/5x.
Am thinking 3750E-48TD as ToR (dual member stack with 10G uplink from each member to dual agg switches). Racks will be densely packed with 1U servers - guessing 38 servers per rack - dual NIC - so run NIC teaming up to ToR stack.
I'm trying to decide on agg switch - this will be collapsed agg/core until scaling is needed when core layer will likely be deployed. Was considering 4900M and running 12 x 10G (10 to ToR) and having 1G Copper module for connection to edge/border network. This doesnt scale well when moving to 4 or 5x current requirements as new pair of 4900Ms needed for each additional 10 racks.
My question is has anyone used the Nexus 3064 for aggregating 10G ToRs? I know its costly but leaving that aside anyone see any reason not to? Planning on running L3 at ToR and having all uplinks as routed.
Or does anyone have any suggestions for the agg platform? Space is key here so I'm looking to avoid chassis solutions (45xx, 65xx, 70xx etc).
Cheers
-C

Ah... just found https://supportforums.cisco.com/thread/2101381 which covers this.
Any other feedback very welcome though...

Cisco Nexus 7010

Hi,
Can any one please let me know how to enable http/https access on cisco nexus 7010
Regards
Asif Naveed

Following objects from conventional CISCO-PROCESS-MIB provides you details on CPU on devices:
cpmCPUTotal5secRev     1.3.6.1.4.1.9.9.109.1.1.1.1.6
cpmCPUTotal1minRev     1.3.6.1.4.1.9.9.109.1.1.1.1.7
cpmCPUTotal5minRev      1.3.6.1.4.1.9.9.109.1.1.1.1.8
Following document will be helpful as well:
http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094a94.shtml
As many MIBs are not completely implemented on NX-OS so there is one more MIB which can help, i.e CISCO-SYSTEM-EXT-MIB :
cseSysCPUUtilization(1.3.6.1.4.1.9.9.305.1.1.1)
Unlike the averaged values from CISCO-PROCESS-MIB, cseSysCPUUtilization returns an un-smoothed value and typically shows more erratic results. It only shares the the average utilization of CPU on the active supervisor. So usually it is recommended to use the CISCO-PROCESS-MIB, ie. cpmCPUTotal5secRev instead.
-Thanks
Vinod
**Rating Encourages contributors, and its really free. **

Cisco Nexus 1000V InterCloud

Need download link for Cisco Nexus 1000V InterCloud

We had a simliar issue with 5.2(1)SV3(1.3) and found this in the release notes:
ERSPAN
If the ERSPAN source and destination are in different subnets, and if the ERSPAN source is an L3 control VM kernel NIC attached to a Cisco Nexus 1000V VEM, you must enable proxy-ARP on the upstream switch.
If you do not enable proxy-ARP on the upstream switch (or router, if there is no default gateway), ERSPAN packets are not sent to the destination.
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/5_x/release_notes/b_Cisco_N1KV_VMware_521SV313_ReleaseNotes.html#concept_652D9BADC4B04C0997E7F6C29A2C8B1F
After enabling 'ip proxy-arp' on the upstream SVI it started working properly.

Nexus 3064 switch: Can't get MAC addresses through SNMP

Hello Everyone!
I'm seeing an issue in our Nexus 3064 switch where we can't get the MAC address table using SNMP. At the same time, I can see MAC addresses of all the ports from the switch command line (show mac address-table). I've verified that SNMP is enabled and I can fetch other switch information (such as VLANs) using SNMP.
I did an SNMP walk to get the mac (
snmpwalk -v2c -c <communityString>@<VlanID> <ManagementIP> 1.3.6.1.2.1.17.4.3.1), and it didnt return anything.
Could any of you please let me know what can be potentially wrong here? Really appreciate your help.
Thanks for your time!

Greetings Vipins,
This could be caused by CSCto56055 "not getting any value for dot1dtpFdbTable objects", resolved in 5.0(3)U1(2) and later releases.
Kind Regards,
/Phil

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.

Cisco Nexus 5548UP

Hi
I need a switch that supports FC, FCoE and iSCSI traffic. The switch that has been suggested to us is Cisco Nexus 5548UP.
I have the following queries regarding this switch:
1)       At our end, I have AMS 2100 Hitachi Storage which has iSCSI & FC Ports. I also have Qlogic CNA card at the server end which supports both ISCSI & FCOE. For FCoE protocol based traffic, the storage to switch connection will have to be FC and the switch to server connection will be FCoE. Can you please confirm whether, if this will be possible through the proposed Cisco Nexus 5548UP switch?
2)       The specification for the Nexus 5548UP switch claims that it supports 10 Gigabit Ethernet. Can you please confirm if this relates to iSCSI support that the switch provides?
3)       We are going to use -SFP-FC4G-SW & SFP-10G-SR SFP for fiber connectivity. Can you please let us know the what these SFP are used for and whether they assist in FC and FCoE traffic forwarding?
4)       We are also going to use Nexus 5500 Storage License, 8 Ports. Does this indicate that only 8 ports of the switch can be connected to the storage? Among these ports, can we configure 4 ports for FC and 4 ports for iSCSI (keeping in mind that our storage has both FC and iSCSI ports)?
5)       Is there any License required for enable FC, FCoE and iSCSI protocols?
An early resolution of these queries will enable us to make a decision regarding the switch.
Thanks
Bhanudas Mali

The specification for the Nexus 5548UP switch claims that it supports 10 Gigabit Ethernet. Can you please confirm if this relates to iSCSI support that the switch provides?
The "UP" in the Nexus 5548 stands for Universal Port. This means that each port can support FC, FCoE and Ethernet. So, a 5548 has 32 ports of SFP/SFP+. Each port can support and push 10 Gbps at a 1:1 oversubscription rate.
There is an optional 16-port SFP/SFP+ module, N55-M16UP, which will add an additional 16 Universal Ports.
Because they are "universal" they can support 1/10 Gbps FCoE and Ethernet as well as 1, 2, 4 and 8 Gbps FC.

Broadcom LiveLink : Receiving MAC flaps with Cisco Nexus 7000

We are migrating from using two Nortel 8600's running VRRP at the distribution to Cisco Nexus 7K's using HSRP. So we have a server connected to two 3750G switches which then connect to the Nexi (previously the 8600's). As soon as we connected the 3750's to the Nexus and moved the gateway to Nexus, LiveLink forces all the servers to alternate traffic between NIC1 and NIC2.
Since LiveLink is a teaming application, it uses virtual mac for nic1 and nic2, but the virtual mac associated with the IP address moves to the active link.
LiveLink is used to check the availability of the gateway by polling the gateway out of each interface using an ARP request.
The problem does not exhibit itself in our Cisco VSS environment, and with Nortel's VRRP. I tried running VRRP on the Nexus but no joy.
Anyone know of a bug that could cause this issue?

Unfortunately we have LiveLink enabled on most of our Windows servers in our data centers. One of my colleagues sent me this bug issue. I'm not sure if this is the cause, but it's worth trying. We will update the NxOs (currently on 5.1.1) next week and see if that fixes the problem.
•CSCtl85080
Symptom: Incomplete Address Resolution Protocol (ARP) entries are observed on a Cisco Nexus 7000 Series switch, along with partial packet loss and a memory leak.
Conditions: This symptom might be seen when ARP packets have a nonstandard size (that is, greater than 64 bytes).
Workaround: This issue is resolved in 5.1.3.

Cisco Nexus 1000v stops inheriting

Guys,
I have an issue with the Nexus 1000v, basically the trunk ports on the ESXi hosts stop inheriting from the main DATA-UP link port profile, which means that not all VLANS get presented down that given trunk port, its like it gets completey out of sync somehow. An example is below,
THIS IS A PC CONFIG THAT'S NOT WOKRING CORRECTLY
show int trunk
Po9        100,400-401,405-406,412,430,434,438-439,446,449-450,591,850
sh run int po9
interface port-channel9
inherit port-profile DATA-UP
switchport trunk allowed vlan add 438-439,446,449-450,591,850 (the system as added this not user)
THIS IS A PC CONFIG THAT IS WORKING CORRECTLY
show int trunk
Po2        100,292,300,313,400-401,405-406,412,429-430,434,438-439,446,449-450,582,591,850
sh run int po2
interface port-channel2
    inherit port-profile DATA-UP
I have no idea why this keeps happening, when i remove the manual static trunk configuration on po9, everything is fine, few days later, it happens again, its not just po9, there is at least 3 port-channel that it affects.
My DATA-UP link port-profile configuration looks like this and all port channels should reflect the VLANs allowed but some are way out.
port-profile type ethernet DATA-UP
vmware port-group
switchport mode trunk
switchport trunk allowed vlan 100,292,300,313,400-401,405-406,412,429-430,434,438-439,446,449-450,5
82,591,850
channel-group auto mode on sub-group cdp
no shutdown
state enabled
The upstream switches match the same VLANs allowed and the VLAN database is a mirror image between Nexus and Upstream switches.
The Cisco Nexus version is 4.2.1
Anyone seen this problem?
Cheers

Using vMotion you can perform the entire upgrade with no disruption to your virtual infrastructure.
If this is your first upgrade, I highly recommend you go through the upgrade guides in detail.
There are two main guides. One details the VSM and overall process, the other covers the VEM (ESX) side of the upgrade. They're not very long guides, and should be easy to follow.
1000v Upgrade Guide:
http://www.cisco.com/en/US/docs/switches/datacenter/nexus1000/sw/4_2_1_s_v_1_4_a/upgrade/software/guide/n1000v_upgrade_software.html
VEM Upgrade Guides:
http://www.cisco.com/en/US/docs/switches/datacenter/nexus1000/sw/4_2_1_s_v_1_4_a/install/vem/guide/n1000v_vem_install.html
In a nutshell the procedure looks like this:
-Backup of VSM Config
-Run pre-upgrade check script (which will identify any config issues & ensures validation of new version with old config)
-Upgrade standby VSM
-Perform switchover
-Upgrade image on old active (current standby)
-Upgrade VEM modules
One decision you'll need to make is whether to use Update Manager or not for the VEM upgrades. If you don't have many hosts, the manual method is a nice way to maintain control on exactly what's being upgrade & when. It will allow you to migrate VMs off the host, upgrade it, and then continue in this manner for all remaining hosts. The alternate is Update Manager, which can be a little sticky if it runs into issues. This method will automatically put hosts in Maintenance Mode, migrate VMs off, and then upgrade each VEM one by one. This is a non-stop process so there's a little less control from that perspective.   My own preference is any environment with 10 or less hosts, I use manual, for more than that let VUM do the work.
Let me know if you have any other questions.
Regards,
Robert

Cisco Nexus 5010 FCOE Interconnection

Hi, i would really apreciate your help on this doubt.
Is it possible to create a link between two cisco nexus 5010
using CNA interfaces ?
I've already configured the ethernet interfaces(where the cna is plugged in),
i've binded the E1/2, mapped the vsan, created specific traffic vlan, and so on ...
I have tried everything what's written in the manual but the vcf interface won't set up, keeps telling me "vcf is down" .
What am i doing wrong ? or this connection is imposible ...
Thanks in advance.

5020A.1# show vlan fcoe
Original VLAN ID        Translated VSAN ID      Association State
      100                       100              Operational
5020A.1# sho feature | grep np
npiv                  1         disabled
npv                   1         enabled
5020A.1# sho interface brief | grep -i fc
fc2/3      100    NP     off     up               swl    NP      4    --
fc2/4      100    NP     off     up               swl    NP      4    --
vfc15      100    F      on      trunking         --     TF      auto --
!!!here's vfc15 and it's associated interface
5020A.1# sho run int vf15
!Command: show running-config interface vfc15
!Time: Thu Feb 17 12:45:29 2011
version 5.0(2)N2(1)
interface vfc15
bind interface Ethernet1/15
no shutdown
5020A.1# show inter e1/15 status
Port          Name               Status    Vlan      Duplex Speed   Type
Eth1/15       FCoE ports connected trunk     full    10G     1/10g
5020A.1# sho run int e1/15
!Command: show running-config interface Ethernet1/15
!Time: Thu Feb 17 12:45:33 2011
version 5.0(2)N2(1)
interface Ethernet1/15
description FCoE ports
switchport mode trunk
switchport trunk allowed vlan 1,10,30,100
spanning-tree port type edge trunk
load-interval counter 2 30
load-interval counter 3 30
5020A.1#
5020A.1#
5020A.1#
I'd use this to get a look at FIP
ethanalyzer local sniff-interface inbound-hi detailed-dissection display-filter vlan.etype==0x8914 limit-captured 200 write bootflash:fipcap1.pcap
This is assuming that your eth1/2 is working and up.
reply w/your associated show commands
show fcoe vlan
show feature | grep np
show interface brief | grep -i fc
show vsan
sho run inter vfc x
show run inter eth x/y
show inter eth x/y status
other questions
1. what OS?
2. what vendor of CNA card?
Joe

Routing issue between Cisco Nexus and Cisco 4510 R+E Chassis

We have configured Cisco Nexus 7K9 as core and Cisco 4510 R+E as access switches for Server connectivity.
We are experiencing problem in terms of ARP learning and Ping issues between Cisco Nexus and end hosts.

Hi,
So you have N7k acting as L3 with servers connected to 4510?.
Do you see the MAC associated with failing ARP in 4510?. Is it happening with all or few servers?. Just to verify if it is connectivity issue between N7k and 4510, you can configure an SVI on 4510 and assign address from same raneg (server/core range) and perform a ping.
This will help narrow down if issue is between server to 4510 or 4510 to N7k.
Thanks,
Nagendra

How to enable GUI for a Cisco 1841?

How to enable GUI for a Cisco 1841?

Hi,
install SDM or CCP on your PC then on the router :
en
conf t
ip dhcp excluded-address 192.168.1.254
ip dhcp pool MYPOOL
network 192.168.1.0 255.255.255.0
default-router 192.168.1.254
ip http server
ip http authentication local
username xxx privilege 15 secret xxxx
int f0/0
ip address 192.168.1.254 255.255.255.0
no shutdown
Regards.
Alain.

FCoE with Cisco Nexus 5548 switches and VMware ESXi 4.1

Can someone share with me what needs to be setup on the Cisco Nexus side to work with VMware in the following scenario?
Two servers with two cards dual port FCoE cards with two ports connected to two Nexus 5548 switches that are clusterd together. We want to team the ports together on the VMware side using IP Hash so what should be done on the cisco side for this to work?
Thanks...

Andres,
The Cisco Road Map for the 5010 and 5020 doesn't include extending the current total (12) FEX capabities. The 5548 and 5596 will support more (16) per 55xxk, and with the 7K will support upto 32 FEX's.
Documentation has been spotty on this subject, because the term 5k indicates that all 5000 series switches will support extended FEX's which is not the case only the 55xx will support more than 12 FEX. Maybe in the future the terminology for the 5k series should be term 5000 series and 5500 series Nexus, there are several differences and advancements between the two series.

Enabling ECN marking on Cisco nexus 3064

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