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Questions tagged [cisco-nexus-5k]

For questions about or involving the Cisco Nexus 5000 Series. For instance, you are setting up a Nexus 5000 or troubleshooting an issue with it.

2
votes
1answer
28 views

Cisco Nexus 5672, not showing ARP records for VLANs

I have a Cisco Nexus 5672 which only lists the management VLAN ARP records, when doing show ip arp vrf all yet we have many VLANs on this switch, but it doesn't have a IP in all the VLANs, only the ...
3
votes
3answers
403 views

How to debug L1 Auto negotiation issues?

One of our Linux hosts has started switching its gears recently. While checking the interface speed, I could see that the interface has switched down to 10Mbps. The NIC and Switch are capable of 1G ...
1
vote
1answer
53 views

Server1 cannot reach Server2, both connected to the same switch

I have a user getting some "security error when trying to access the Server2" from Server1. Both server1 and server2 are connected to the same switch but the servers are on different VLANs. Server1 - ...
1
vote
1answer
320 views

Nexus IOS upgrade - pair of 5548's

i need to upgrade the ios for these 2 nexus devices. Currently they are running on 6.0.2, how i can check which 7x version should i use ? Software BIOS: version 3.6.0 loader: version N/A ...
2
votes
1answer
243 views

Unbalanced port-channel utilization

I have below setup: +------------------+ vPC +------------------+ | | | | | NX5K-SW01 +-----------------------+ ...
0
votes
2answers
586 views

Fabricpath or vpc back to back

have two DC, with 2 N5K on each DC. I want to connect these pairs with Fabricpath to have full bandwidth used. I've seen that vPC back to back can do the trick. BUT Fabricpath brings vPC+ with it, ...
2
votes
2answers
1k views

Netflow vs sampled netflow

I'm working on a project where I could need Nexus 5600. These switches support sampled netflow and not netflow. I would like to use netflow to do stats and to analyze trafic at some specific times. ...
1
vote
1answer
560 views

Jumbo frame on Nexus 5k

I would like to enable the jumbo frame support on my N5k for specific SCSI trafic. I've read we can't do it per interface but only on the system itself : policy-map type network-qos JUMBO_MTU ...
1
vote
1answer
182 views

add local route to vPC member

TLDR; routed port on vPC switch 1 needs to be accessible from vPC switch 2. Our data center has a pair of Nexus 5596T with L3 card being used as the core. These are vPC pair, HSRP members, all vlan ...
0
votes
1answer
187 views

applying licensing to Nexus 5k

I'm running a pair of 5596Ts as a vPC pair. These make up the core in our DC, all L3 is handled here (daughter card installed), all subnet gateways live here, using HSRP across them all. Our current ...
1
vote
5answers
5k views

1 x 40G QSFP to 4 x 10G SFP+ Can these 4 x 10G breakouts go to different hosts?

I am getting quotes for Structured Cabling and one guy is saying that I can use 40G MPO from my distribution switch up to a 40G MPO patch panel connection and across a 40G MPO trunk but then break it ...
0
votes
2answers
86 views

Core Dropped VLANs and Pickedu up Access VLANS?

My office is running a dual nexus 5k core, with catalyst 4506 closet switches at the user level. Today, I applied the following commands on one of the 4506s: no switchport trunk native vlan 64 no ...
0
votes
1answer
660 views

Cisco Nexus 5k EIGRP Configuration

I have two Cisco Nexus switches with EIGRP Routers. Switch 1: SWITCH1(config-if)# sh run !Command: show running-config !Time: Sun Feb 21 05:29:57 2016 version 5.0(3)U5(1f) no feature telnet no ...
3
votes
1answer
108 views

DCNM Lincense Allocation

I recently installed Cisco DCNM (Data Center Network Manager) and my trial license has expired but I would like to continue to use the free Essentials license for my 5K switches. Can anyone advise ...
1
vote
1answer
413 views

High-Resolution Measurement of link utilization of Cisco (Nexus) Switch Interfaces

For a research project I need low timescale interface utilization measurement on a Cisco Nexus 5000 devices and some fabric extenders. Background: The switch is used to "simulate" an optical network, ...
5
votes
1answer
4k views

Configuring a password policy on Cisco IOS or NX-OS

I was wondering if it's possible at all to configure a password policy which enforces password complexity for locally defined accounts. I know it's possible for TACACS+ and RADIUS, but I need to know ...
5
votes
1answer
1k views

Consoled into Nexus 5596 and can't SSH or Ping directly attached servers - No route to host

How can I SSH to my Servers from Cisco IOS. My only current access to router is via console port.
5
votes
1answer
1k views

Cisco Nexus vpc card type mismatch

I have a pair of Nexus switches configured for vPCs. In several cases, it is working correctly: core01# sh vpc consistency-parameters int po40 Legend: Type 1 : vPC will be suspended in ...
2
votes
1answer
1k views

Cisco N9K without ACI? Or am I better off with N5K?

Some people say that I should stay away from the N9K if I'm not planning to use ACI. Cisco stats that it has 50% less code. Do you guys have any practical experience with deploying N9K switches? I'm ...
7
votes
2answers
446 views

How to connect private users to applications within a trusted network without direct connection to the Server Switch

I have 2 Control Center Sites each with 2 N7Ks in a full mesh design and 2 Nexus 5548UP’s as Internal Server Farm Aggregation and 2 ASA Firewalls hanging off each N5K Agg. Both Sites have a mirror ...
5
votes
1answer
2k views

Is SFP+ backwards compatible with SFP?

Can I stick an SFP transceiver module in a SFP+ port in a Cisco Nexus 5K for example if I need to connect a fast ethernet switch with a 1 Gbps SFP uplink port? I saw this Nexus's ports are 1/10 Gbps. ...
4
votes
1answer
1k views

Cisco Nexus 5000 VTP trunk status in vPC consistency-parameter

In a pair of Nexus 5000, the show vpc consistency-parameters command displays VTP trunk status on only one Nexus Enabled. The config is identical, what is the reason for the discrepancy? # sh vpc ...
5
votes
1answer
608 views

Is different profile-revision numbers alright with Cisco switch-profiles?

So, I had a well-working switch-profile configuration that was synchronized between my core01 and core02 switches. Until profile-revision 66, that is. I was trying to renumber a FEX (which wasn't in ...
7
votes
1answer
461 views

Factors that determine compatibility of SFPs with new fibre services?

Whilst I understand that product recommendations are off topic can anyone help by explaining what the critical factors are when looking for SFPs that are going to be compatible with a new service? Is ...
9
votes
1answer
524 views

What path does a packet follow through a Cisco Nexus 5k/2k infrastructure?

I was told by someone that a packet going between two hosts connected to the same Nexus 2k would end up being passed all the way up to the 5k that is managing said 2k for logic to be applied and then ...
1
vote
1answer
6k views

Nexus 5020 default route

I just setup a nexus 5020 and while I know it's primary purpose is to be used as an L2 device, according to docs, I should still be able to set a default route in the global routing table. However, ...
3
votes
1answer
902 views

NX-OS: Importing already mirrored config into a switch-profile

I'm running NX-OS version 5.2(1)N1(5) on a pair of Nexus 5020s that are mirrors of each other for all intents and purposes. After OS upgrades some of the configuration that was inside the switch-...
1
vote
1answer
4k views

Microsoft NLB - static MAC necessary?

We've implemented Microsoft NLB before, but it's not a common thing for our environment, consequently I've not looked at the config in a while. The topology is: EDGE == 3750X's (stack of 2) == N5K's ...
11
votes
1answer
10k views

Can adding VLANs to a VPC be done hot?

In this scenario, we have a VPC '17', consisting of two single port port-channels 'po17'. There are 2 x N5K's (5548s) - so po17 from both sides combine to create the VPC. The downstream devices are ...
12
votes
1answer
4k views

NX-OS peer-switch issues with 6500 VSS

I'm bringing up a new pair of Nexus 5500s running NX-OS 5.2 and I'd like to make use of the new vPC Peer Switch feature: The Virtual Port Channel (vPC) peer switch feature addresses performance ...