we have several uplink ports on a verity of cisco switches connecting to the nexus 7000, recording CRC errors.most are trunked ports with the following configuration. [code]
View 2 RepliesI have a Nexus 7000 pair with Etherchannels connecting to various access switches. 2960's and 3750's.The access switches channel 2 ports together. LACP active mode. One link goes to one Nexus and one to the other. Those connections are a portchannel with vpc configured.Every 30 seconds on every interface connecting to one Nexus I see a FCS error. The errors increment at the same time every 30 seconds. Only on one port. If I shutdown that link and keep the channel up on the other link the errors move. No shut the interface and they move back.This must surely be some Nexus generated packet that the access switch does not recognize/ what is likely to be getting sent at 30 sec intervals to all Channel members on one link ?
View 4 Replies View RelatedWhy the nexus 2k has 8 uplink ports ?
the nexus 7k or 5k can be devided into 4 virtual devices ( using vdc)and making 8 uplink ports in the 2k will allow us to use the extender for all the 4 vdc's with 2 uplinks ( for redundancy ) from each vdc
I have been tasked to replace the existing Cat 6500 and 3750 switches by Nexus 7000 and Nexus 2000.I was told initially my boss plans to get 2 x Nexus 7000 and then eventually blow up to 4 x Nexus 7000s.For Nexus, is there a list of tasks / points that i need to consider for building the initial design?
Can i just link the Nexus 7000 like the following?
N7k-A ========= N7k-B
| |
lots of N2ks lots of N2ks
we have just purchased a few 3750x's that we intend to add to our 3750g stacks. We've purchased the 10gb uplink modules, C3kx-nm-10gt, but when they are installed they are not appearing in the switches web gui nor can you configure them correctly. If we upgrade a 3750x to 15.0.1 they seem to work fine. All of our current 3750g's are running 12.2(58)SE2 IPBASE so we don't really want to have to upgrade them all to 15.0.1
Are we missing something or do the 10gb modules only work properly with ios 15.0.1?
I know in the past on earlier models of the supervisors that you couldn't use all eight uplink ports(4 on each supervisor) simultaneously when you have two supervisors on the chassis. Is this the same case for the 10Gb uplinks on the supervisor 7-E on the 4500 chassis? I tried doing my research but couldn't find an answer.
View 3 Replies View RelatedI have a Nexus 5500 which is the core of our network and we have access layer switches uplinked to it. I know by default the qos markings will be trusted.
1. On a trunk uplink from an access layer switch to the Nexus, I have "mls qos trust dscp". Will the DSCP marking be preserved when it reaches the Nexus?
2. How do I do prioritization of voice traffic on an uplink on Nexus based on DSCP EF?
Should I install any special license to enable vrf within Nexus 7000 VDC? I observed that vrf routing instance is not enabled in the VDC.
View 2 Replies View RelatedI am configuring NTP on a new Cisco Nexus 7000 running version 6.1(2). NTP is working properly between the access switches and Nexus, however when configuring Authentication, NTP is not working anymore.
confguration:
Nexus 7K server
=============
ntp server x.x.x.x
ntp peer q.q.q.q
ntp server e.e.e.e
ntp server r.r.r.r
ntp source-interface Vlanx
[code]...
why NTP authentication is not working !!!!! on Nexus 7000
On a 7K (5.0(2)), I have a situation where the FIB and RIB are out of sync. I'm not sure it's causing a problem, but it's been implicated in some weird packet loss issues. It seems like it could cause network issues if you had two routes in the RIB, only one in the FIB, and then you lost the single path in the FIB. How the RIB/FIB gets out of sequence, how to proactively know about it (nothing in the logs here), and whether or not this is a big deal or a red herring?
Here's sample output that illustrates the RIB and FIB being out of sequence.
ROUTER1# show ip route 172.16.100.1
IP Route Table for VRF "default"
'*' denotes best ucast next-hop
[Code].....
We recently purchased a pair of 2232TM Fabric eXtenders just to find out that our Nexus 7000 does not support it. Will there be support for the 2232TM FeX in Nexus 7000 any time soon?
View 4 Replies View RelatedI have two data centres connected via a L2 DWDM, my manager wants to look into using OTV to get rid of the layer 2 broadcasting issues.
Problem is the DWDM is 1000BaseSX, which is only supported on the N7K-F132XP-15. (and the N7K-M148GS-11 but that doesn't support FCOE, so many bloody caveats). From what I can gather OTV is not supported on the N7K-F132XP-15.
Is it possible to terminate the DWDM on the F1 card & loop another port from the F1 to a port on the N7K-M148GT-11 & run OTV on the M1????
Either using VDCs or just an isolated VLAN on the F1. Is there any better way to do this? Hardware has not yet been purchased.
I am seeing an issue that after deleting/recreating one of the VDC in Nexus 7K, VLAN is not been able to be configured within the VDC although it is not actually a reserved VLAN. Could it be anything missing in the license installation? the version of the image is NX-OS 6.1.2
StorageVDC(config)# vlan 100
^
invalid vlans (reserved values) at '^' marker.
We setup two n7K as core switches in our network. We configure VPc peer link as well successfully. We are using mgmt interface of supervisors as a peer keep alive interface, so what happen when this keep alive gets down? Are we loss Vpc peer link between both nexus 7 K?
View 4 Replies View RelatedI have a pair of Nexus 7K's running 5.1(3). I have a handful of edge devices that I need to mark ingress traffic, and need to mark both DSCP and CoS. Right now, I have a working config that marks DSCP appropriately.While that works dor DSCP, the MQC will not allow me to mark both DSCP and COS in the same class, and unlike IOS, it appears that Nexus does not have a default DSCP-to-COS mapping. My understanding is this can be solved using table maps, but I don't see how that can solve my problem in this specific scenario (it appears I can do marking or table-map mutation, but not both?). How I can accomplish both?
View 5 Replies View RelatedI cannot get the AAA tacacs+ authentication to work on my Nexus 7000.
View 4 Replies View RelatedI need to know how is the ambient temperature for the Nexus 7000 switches to plan a new datacenter. In the datasheet I found the following information regarding this topic:"GR-63-CORE Network Equipment Building Standards (NEBS) specification published by Telcordia Technologies in Section 4.1.2". How are the specification for temperature in this standard?
View 1 Replies View Relatedregarding QOS on Nexus 7000. Our Nexus 7000's form a collapsed distribution/core layer, our access layer switches are are a mixture of Cisco 3750 & Cisco 4507. 3750 switches will connect to Nexus switches via 1Gb uplink, 4507 switches will connect via 10Gb uplinks. Each Nexus will be connected via 20Gb port channel, all servers connect to the Nexus switches via 1Gb links. We're implementing a new telephone system soon which will be using VOIP so I need to configure the switches to perform QOS. The IP phones will mark the RTP traffic with DSCP value EF and call signaling traffic CS3. I'm fine configuring qos on the access layer switches, its just the Nexus switches which I'm not sure about.
Do I actually need to configure any QOS parameters on the Nexus switches so they will prioritise the VOIP traffic. If my understanding the Nexus switches will trust the DSCP values and assign the traffic to the relevent queues?
Just for information VOIP is the only traffic I will be marking QOS values
On Nexus 7000s I want to limit bandwidth of particular IP. I can do this using proper configuratio of IP ACL, policy map and class map. But what if I dont have information on interface? Can I apply bandwidth control for particular IP without knowing the interface?
View 3 Replies View Relatedif vPC is supported between a single 2232PP FEX and two 7000 switches running 6.0(1)? I have been researching this for an implementation I am doing for a client and was able to determine it was not supported with earlier versions of 5.0 when the FEX is connected via vPC as I described above, but I can't find anything related to version 6.0(1). I have done this for other clients with 5000 and 2000 switches, but I don't have too much experience with 7000 switches.
View 5 Replies View RelatedI have some error messages in the Nexus 7000 log, after searching i cannot find an adequate explanation, pretty much the only thing i can find is below and i don’t think it is very relevant to my situation. The device is in production and so reloading and pulling card willy nilly is the last resort.
Device = Nexus 7018
IOS version = 5.1(2)
Log messages=
2011 Dec 2 14:52:35 IAS01LVSWIPC01 %OC_USD-SLOT8-2-RF_CRC: OC2 received packets with CRC error from MOD 6 through XBAR slot 1/inst 1 and slot 2/inst 1 and slot 3/inst 1
[code]....
I have a Nexus 7000 plus 6 boxes NX2000 on backbone.I have configured on 7000 :
conf t
system jumbomtu 9000
exitERROR: Ethernet111/1/1: requested config change not allowed
...
ERROR: Ethernet122/1/48: requested config change not allowed
1/111/14 is a NX2000 port conf tinterface ethernet 1/111/14 switchport mtu 9000 exit
I have gotten this message : Error: MTU cannot be configured on satellite port(s) - Eth122/1/11 ?I have tried on a NX7000 TP port:ERROR: Ethernet10/45: MTU on L2 interfaces can only be set to default or system-jumboMTU ?Does JUMBOMTU configuration can be done only when there are no NX2000 configured ?
I've learned recently that the Nexus 7000 only allows the configuration of a maximum of 2 Monitor sessions for spanning traffic. I only have one monitor session left and I need to do the following. 2 Core Nexus 7000 boxes with 2 different traffic probes/sniffers to each nexus( eg Sniffer 1 connects to Switch A on interface eth 1 and to Switch B on eth 1 ; Sniffer 2 connects to Switch A on eth 2 and to Switch B on eth 2.) My plan was to setup a standard session with multiple sources and destinations then on the interfaces connecting to the sniffers run a trunk and do 'sw trunk allowed xxxxx' and filter what I need to go to each sniffer box. However I've recently found out that some of my source traffic is coming from Port-Channel interfaces. Is there a way I can get around this and still do the filtering within only 1 monitor session ?
View 1 Replies View RelatedI'm interested to know whether we can configure ip helper in nexus 7000?
View 2 Replies View RelatedAre there any dependencies on VTP on the Nexus platforms like the 5500 or 7000? In IOS P V LAN required VTP Transparent mode however I cannot find any reference to this for the Nexus platform. Are there any other features that would require the use of VTP? By default VTP is turned off on nexus and has to be enabled with the feature command so is there any benefit to running VTP in transparent mode vs off?
View 1 Replies View Relatedi like to configure two ports in dedicated mode (eth4/1 + eth4/2).the ports are on a modultype "N7K-F132XP-15" (32x10GE)all ports are in one vdc membership (default configuration)
ive tried this for port eth 4/1:
bciscon7k01(config)# int eth 4/1,eth 4/3,eth 4/5,eth 4/7
bciscon7k01(config-if-range)# shut
bciscon7k01(config-if-range)# int eth 4/1
bciscon7k01(config-if)# rate-mode dedicated
after that i get the following message:"Ignoring command for interface Ethernet4/1 as rate-mode is fixed." i didn't find any documentation to this error message.whats wrong in my configuration?
If the latest release of NX-OS 6.1.2 supports dual homing a Nexus 2000 to a pair of Nexus 7000s (F2 Module)? The document does state something about support for vPC+ but is not really clear about it.
View 4 Replies View RelatedI have couple of SFP and most of them are working fine except this:-
Nexus7000# show interface ethernet 6/31 transceiver details
[code]...
a) What is the reason this is not getting recognized?
b) Is theSFP SFBR-5766PZ-CS1 plug and play in the 7000 Nexus?
future support for IP Sla on the nexus 7000. The latest info that I've seen is that it will/could be supported in release 6.2, scheduled for mid 2012. Does this still accurate?
View 1 Replies View RelatedI have one cisco Nexus 7000 with version 6.1(2).I created 3 VDC
ADMINCOREsecurity
I have configured 1 - 45 ports for Core and 46 - 48 ports for Security.Now I am not using the VDC Security and I tried to move the assigned ports 46 - 48 from Security to ADMIN.Switch accepted the command .But the ports are not visible on ADMIN VDC.Now it is not showing on Security VDC also. I need this ports in ADMIN VDC
i need to do EPLD upgrade. on a couple of Nexus 7000 with only 1 10Gb card per Switch and 2 peer-link on this card. Can you tell me what's happening when the 10GB card on the vpc secondary role Switch will be EPLD upgraded.
View 6 Replies View RelatedI have an odd situation where I cannot get a device connected to a built in switchport with out input and crc errors. When connecting to a GLC-T sfp it works fine.Here is my test layout
Outdoor wireless AP --- 10' of cat6 cable --- Gigabit POE injector --- 10' Cat6 cable --- 3560G port 48. (input and crc errors)
When I do this there are input and crc errors on the switch port. This has been confirmed on three different switches and three different outdoor AP's. We though at first it was the injector, but when we run the same setup, but instead connect the device to port 49 with a GLC-T sfp there are no errors.
Outdoor wireless AP --- 10' of cat6 cable --- Gigabit POE injector --- 10' Cat6 cable --- 3560G port 49 (GLC-T). (No errors)
I have upgraded the 3560G to the latest ios and still it has the same problem. If I run the same setup to a 2960 there are no errors at all.
Outdoor wireless AP --- 10' of cat6 cable --- Gigabit POE injector --- 10' Cat6 cable --- 2960 port g0/1 (No errors)
I have also tried manually setting the speed on the 3560G with no success.
I have forgot this technology name, but, I remember it can achive on between Nexus 7000s in two location, and also between two catalyst 6500.Can I ask if it can be done between one nexus and one catalyst 6500?
View 8 Replies View Related