Questions tagged [cisco-nexus]

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Is the Cisco Nexus 3132C-Z switch capable of handling HPC?

We are looking into network switches able to support an HPC Cluster of up to 32 nodes, but probably closer to 10/15. There will be one login and storage node, and the rest will be computing nodes. We ...
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37 views

Is it possible to decapsulate ERSPAN and forward on RSPAN?

I am currently running into an issue where we are trying to send our network traffic from our physical infrastructure into a virtual Alienvualt appliance, but our switches are unable to send RSPAN ...
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1answer
36 views

I want to display UPDOWN message of interface on Nexus

The unit exam of Nexus is underway. Like Catalyst or IOS "* Oct 6 08:29:28:% LINK-3-UPDOWN: Interface GigabitEthernet 1/2, changed state to up" I thought I would get an UPDOWN message for an ...
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1answer
80 views

Cisco Catalyst “Traffic Spanning” not working, multiple methods attempted, not sure what to try next

So we have an odd setup here. Where I work, we have two Nexus 9k switches running our core network - A and B named respectively, and they have span ports which send traffic to a Catalyst 2960-X which ...
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24 views

Cisco HW-VTEP and routing protocols

I'm planning on using a Nexus 9300 switch as a HW-VTEP in an NSX environment. I understand the switch can be the gateway for VNIs with binding to an external VLAN. My question is, is that gateway ...
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3answers
1k views

About 4x10G SFP+ <--> QSFP breakout cable

I have my very first Nexus switch to install in our new datacenter. It's a 3172TQ that comes with 4 QSFP+ ports. All my other devices have SFP+ modules. I did a little research and i found about the ...
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1answer
361 views

LACP bond work intermittently on Cisco N5000

Our clients are using Centos 7.1 and 7.3. They are two 10GB card bonded to make a 20GB link. Each of the network card is connected to a pair of Cisco N5000 switch. While running cp or iperf, I can see ...
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1answer
1k views

SSH Error from Nexus 5K to Linux

I built a CLI shortcut to ssh the config over to an Ubuntu box (with an SMB share mounted to the user home directory). cli alias name archive copy startup-config scp://sw-backup@1.1.1.3//home/sw-...
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1answer
3k views

Rate Limit VLAN interface | Cisco Nexus

How to do QoS in cisco nexus for Rate limit. In cisco Routers , we will be creating a policy map and calling it in service_policy in VLAN Interface Ex: Policy-map Policy_2Mbps class class-default ...
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1answer
713 views

High availability links on VMware ESXi

I have a cluster of 3 VMware ESXi6.0 hosts which are not licensed for VMware Distributed Switch. Currently, these hosts are configured with a static LAG between 2 ports on the server and a port each ...
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1answer
31 views

Is information transmitted over Cisco routers saved anywhere on the router itself?

Everything is in the title: Is information transmitted over Cisco routers saved anywhere on the router itself?
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1answer
88 views

Nexus 1000v Port Channel to Virtual Machine

Is it possible to setup a Port-Channel between a Nexus 1000v Switch and a ESX Virtual Machine? Context: I am running a Checkpoint Firewall cluster as Virtual Machines on an ESX server. I want to ...
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1answer
245 views

Is it possible to run the Cisco NX-OS 6.x copy command without the prompt to select a VRF?

I am currently working with a network scanning tool that logs into Cisco routers and runs commands on those routers. The problem I'm encountering has to do with what the copy command expects. The copy ...
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1answer
1k views

Cisco Nexus 7000 Multicast IGMP Snooping enabled - packets got to all interfaces

I have connected three servers to Cisco Nexus 7000 switch. Server1 send multicast packets, server2 subscribes to multicast packets and server3 is for the tests. No matter if I subscribe to multicast ...
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2answers
1k views

What do I need to do to enable sFlow on my Cisco Nexus 9372PX?

I have a pair of Cisco Nexus 9372PX switches running NXOS version 7.0(3)I1(3). According to the link at http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/system_management/...
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2answers
2k views

cisco 5548 - version 5.2 equivalent command to “service unsupported-transceiver”

In my new cisco switch version, kickstart: version 5.2(1)N1(7) system: version 5.2(1)N1(7) In this latest IOS , it doesnt have service command. Could any one help , the equivalent command for "...
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0answers
33 views

Long Response Times for Reads via FCoE

We're getting some intriguing performance with our new FCoE environment, and I was hoping that people could let me know if what we're seeing is expected behaviour. Our switching environment consists ...
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1answer
2k views

LACP - Up Sngl-port-Bndl Mstr Not-in-Bndl

I setup a port channel between two Cisco switches, a 6509 running ios 12.2(17r)S4 and a 5596 running nx-os 5.2(1)N1(4). Several issues arose including bad patches and broken cables, but I currently ...
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1answer
6k views

Windows 2012 R2 NTP server Unable to sync with Cisco Nexus

I am the PDC Admin, The Windows NTP server is set correctly, we have 5 different time sources set. We are able to sync with 2 of those time sources and other external time sources such as ntp.org (...
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1answer
77 views

Cisco Nexus 1000v %IPQOSMGR-4-QOSMGR_WARNING_MSG

I have a Nexus 1000v installation running for well over a year now without any problems. Recently I noticed that I keep getting a warning every few minutes on CLI. 2015 Sep 7 15:13:53 n1kv ipqosmgr[...
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1answer
538 views

Migration to Cisco Nexus 3064-T

In my environment I have 9 ESXi servers (ProLiant DL360 G7 & DL360p Gen8) and NetApp FAS2240 that is used for storage (NFS datastores). Currently, we have 1Gbps network with multiple VLANs (...
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276 views

How to terminate any ip/ip tunnel which has this host as destination

I am in a situation where I want to terminate any tunnels at one device. I.e. I want to be able to create a tunnel to this device from any source ip adress. Something which can inspect a packet, see ...
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1answer
2k views

How can I prevent myself from being automatically logged out of a cisco nexus switch because of inactivity

Is there a way where I can prevent myself from being logged out of a cisco nexus switch/router (or any other cisco device) after a period of inactivity? I get this message after being kicked off: ...
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0answers
624 views

Hyper-V VMs keep losing network connection

We had a major power loss in our server room two days ago and several Cisco Nexus 2232PP FEX devices went down. We were able to get everything back online, but since that event we've been experiencing ...
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1answer
803 views

Is there a way to limit the network bandwidth / filesystem use per user over NFS on a Solaris 10 file server?

We have a large file server running on Solaris 10 and about 200 computing nodes running on Ubuntu. The nodes access the file server over NFS. The load gets larger and larger over time. Is there a way ...
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1answer
119 views

Cisco MOTD from external source

Is it possible to have the MOTD Banner set from an external source while maintaining a hard coded value (if present)? Possibly like a TFTP server? Only way I have ever seen this done is via it being ...
2
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2answers
371 views

Isolating Ethernet ports on a Cisco Nexus 5000

We have several machines plugged into various ports on a Cisco Nexus 5000. We want to separate the switch into groups, so a handful of machines can see and talk to each other and no one else. So, to ...
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1answer
184 views

Is Cisco Misquoting the Nexus 7000 specs [closed]

Looking at the following image: http://blogs.cisco.com/wp-content/uploads/7000-family-550x358.png Cisco is quoting the 7009 as having a 10GigE density of 336 and a backplane bandwidth of 550G/slot. ...
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1answer
1k views

Is a Fabric Module required for a Nexus 7009, or is it part of the Chassis?

I noticed that Cisco lists separate fabric modules for the Nexus 7009 switch. If I were to simply buy the Nexus 7009 Chassis (N7K-7009), what would I need at minimum? I just want to confirm, but I ...
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1answer
509 views

Catalyst to Nexus Migration - Can 4948s be used for access switches

We currently have a switching topology in which two 7600 make up the core and there are N many access layer 4948s at the top of every few racks. They are trunked to both 7600s. I would like to ...
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1answer
6k views

Don't show “more” when showing current configuration on Cisco Nexus switch

How do you stop a Cisco Nexus 3000 series switch from paging (i.e. showing "more" and forcing the user to hit space/enter) before doing a show running? On a Cisco ASA, you can do "term pager 0", but ...
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1answer
4k views

Cisco Nexus: list all interfaces with their ips

This is the same as this question, but for Nexus: Junos: find out each interface's ip I need to show all interfaces with their respective IPs. I know that on IOS I can get that with show ip ...
4
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1answer
2k views

Cisco Nexus 5548UP - which side is the 'front'?

The Cisco Nexus 5548UP switch is sold in a both front-to-back and back-to-front cooling options, but which side is considered the front? The side with all the SFP+ ports? The side with the management ...
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1answer
2k views

Cisco Nexus syslog messages format?

I'm trying to normalize Syslog messages generated by a Cisco Nexus box. Problem: Messages have the following format: <189>: yyyy mm dd hh:mm:ss UTC: text This is not a standard Syslog message, no ...
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2answers
11k views

Are you able to save the running-config on Nexus Switches

I have been trolling Cisco sites and have not been able to find an answer to this questions. Are you able to perform a write mem or likewise to save these configs on Nexus 5000 switches?
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1answer
3k views

Why is my Nexus 5548UP not adding ARP entries for the trunk to a 2960S?

I have a Nexus 5548UP trunked to a Catalyst 2960S. I have verified that spanning tree is working. I explicitly made the 2960S the root bridge for all VLANs as a temporary measure since it is trunked ...
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1answer
17k views

How do I get past “SFP Validation Failed” on a FET-10G transceiver on a Nexus 5548UP?

I inserted a FET-10G (Fabric Extender Transceiver) SFP transceiver in my Nexus 5548UP and I got "access down" "SFP Validation Failed" in show interface. FET-10Gs came with my 2232's so I figured they'...
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1answer
31k views

How do I get past “SFP Validation Failed” on a SFP-GE-T transceiver on a Nexus 5548UP?

I inserted a SFP-GE-T (Gigabit RJ-45) transceiver in my Nexus 5548UP and I got "access down" "SFP Validation Failed" in show interface. According to the Cisco Gigabit Ethernet Transceivers ...
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1answer
318 views

Will an iSCSI SAN perform well when connected to a 2232PP fabric extender? [closed]

I intend to rack up servers and iSCSI SANs and connect them to 2232PPs that are fabric extenders uplinked to 5548UPs on a distribution rack. Will an iSCSI SAN perform well when connected to a 2232PP ...
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2answers
2k views

How do I connect 100BASE-T (iDRAC6) hosts into a Nexus 2232PP via SFP+?

I have a dilemma. I want to have an end-to-end 10 Gigabit Ethernet network over SFP+, but my Dell servers have iDRAC6 which only works on 10/100BASE-T. The closest thing I could find was the GLC-T ...
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1answer
570 views

Are all SFP+ tranceivers usable for FEX between Nexus 5000 and Nexus 2000?

I am looking at building a network with Nexus 5000 parent switches and Nexus 2000 fabric extenders. The mystery at the moment is what kind of SFP+ tranceivers are required for cross-connecting racks. ...
2
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1answer
2k views

Nexus 1000v VEM fails on 2 out of 8 hosts

I have 8 ESXi hosts. I do a fresh install from the installable CD directly to 4u1. We have another 2-node cluster with a working Nexus 1000v primary & secondary. Everything's up and running. I ...
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3answers
240 views

Has anyone had any problems with CNAs (Converged Network Adapters)?

I'm looking to buy some CNAs to trial with, probably the Emulex board. Just wondering if anyone's using these cards or any competing cards and if so have you have any problems with them yet? In ...