Cisco Switching/Routing :: 1000v VXLAN Can't Get Uplink MTU 4681
Sep 2, 2012
I'm trying to configure VXLAN on 1000v but it not working between two esx.
As I followed the troubleshooting guide on Cisco's website I discovered the following error: Can't get uplink MTU: 4681 Here is the output of the "vemcmd show vxlan-stats ltl 50" command. Port LTL 50 is the VM's port.
vemcmd show vxlan-stats ltl 50
VXLAN Port Stats for LTL 50
Unicast Encapsulations: 0
[Code].....
I've set mtu to 9000 on the UPLINK profile (port-profile) and enabled jumbo frames support on the upstream switch.
Here is the output of show run: [URL]
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Feb 9, 2012
have a single host that refuses to register his VEM in VSM, I can see him in show svs neighbors and all other servers went in although a couple of them we had to do more than once but I have all indications it is working, have correct license, sees him, pings him, everything looks fine but from timeto time just get the message:
N1KVSM-B# 2012 Feb 10 15:45:32 N1KVSM-B %VMS-5-DVS_HOSTMEMBER_INFO: A host with name=[ky-dc1-esxi13.cajones.local] and uuid=[00000000-0000-0000-8000-0025b5010019] is added to the dvs. The host is not found as a module in the VSM configuration
So I even added him to the VSM configuration statically as VEM 7 the next available and nothing.
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Apr 17, 2012
Anyone got a single VSM (albiet in HA) managing two vDS split over two ESX clusters connected to a single instance of vCenter?
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Aug 28, 2012
We have a requirement for private VLANS for DMZ hosting within one of our datacentres. I just want to query how private VLANs would work in our environment.We have physical servers connected to fex ports (2 fex per rack for each 5k) of a 5548UP switch, virtual servers using the nexus 1000v (vmware hosts connected to fex ports) Out firewalls and load balancers are connected to an upstream pair of nexus 7ks using vPCs.My question is this, ordinarily the firewall would be in a promiscuous port but as these reside on a physically separate switch will the normal vPC trunk still be sufficient or would the "switchport mode private-vlan trunk promiscuous" be required on the vPC up to the northbound 7k.As these connections are already in production I do not want to affect the existing traffic that doesn’t use private VLANs.
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May 29, 2012
According to Cisco, Nexus 1010 can host up to (6) Virtual Service blades. I can't find out how many Virtual Supervisor Modules and Virtual Ethernet Modules that make up one Nexus 1000v switches can be supported by each Virtual Service Blades. In other words, how many Nexus 1000v switches can be created with Nexus 1010 appliance?how to configure Nexus 1000v switches with vmware. without Nexus 1010, the standalone nexus 1000v switches was configured from vCenter as an OVF. But how to configure Nexus 1000v switches with vmware where nexus switches are hosted on Nexus 1010 appliance.
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Apr 14, 2011
Having problem pinging from Host A on ESX1 to Host B on ESX2. Each host are assigned the same port-profile. If I put 2 host's on the same ESX machine using the same port-profile, they are able to ping each other.
n1kv-vsm# sh port-profile name xxx-prod-40port-profile xxx-prod-40 description: type: vethernet status: enabled capability l3control: no pinning control-vlan: - pinning packet-vlan: - system vlans: 1 port-group: xxxl-prod-40 max ports: 32 inherit: config attributes: switchport mode private-vlan host switchport private-vlan host-association 40 400 no shutdown evaluated config attributes: switchport mode private-vlan host switchport private-vlan host-association 40 400 no shutdown assigned interfaces: Vethernet3 Vethernet4
System-uplink profile is trunking all vlans.
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Dec 9, 2012
Why 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
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Jan 28, 2013
I have a two Cisco 4510R each with two sup V-10GE redundant. The code on these sup modules are 12.2(31r)SG3. I need some assistance in getting this setup worked out. I have all four of the 10GE populated with appropriate optics. I setup a link from one 4510R to the other using these interfaces. From the documentation I found I had to use Tengi1/1 and Tengi2/2 as the redundant pair. I plugged the up link into these ports. The Tengi1/1 (active supervisor) links up and works fine. But when I look at the ports port Tengi2/2 it isn't showing link or active. Now port 2/1 (nothing plugged into it) is showing as active.
Now is the redundancy supposed to be 1/1 and 2/1? If so, the switch is in production, when I move the connection over from 2/2 to 2/1 will it cause a outage? The reason for this is I now have a system with a 10G port and would like to utilize one of the other 10G ports. Is that possible? Or does it have to be a lag/redundant up link to work (say to another switch)?
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Nov 14, 2011
If I have two stackable switches one that connects to the 6509 core switch and the other switch does not, do I have to uplink the switch to the other switch so that switch has route to the core switch or because the switches are daisy chain there is not need to cable one switch to to the other switch connected to core switch?
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Feb 7, 2011
I am trying to connect a cisco catalyst 3750g-48ts with our exsiting 3com corebuilder 9000 using the SFP ports, I have established a link and the interface is up.
The issue is that no data is passing through between the two, everything looks like it's up and enabled, spanning tree has detected the uplink port and has automatically set it to forward, both devices suggest the link is in place and the lights are on .
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Oct 1, 2012
I have a switch 2960-24TC-L with GEC (realised with 2 giga interface uplink) with switch 3750. the configuration is ok, the GEC is up and other feature working. I try to upgrade 2960-24TC-L from 12.2.44SE6 to 12.2.46 or 12.2.5x or 15.0.x...the upgrade it's ok the swithc boot..and the configuraiton is same.. but the giga 0/1 and 0/2 on 2960 not bring up....and the better the interface on 3750 are up.
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Jun 17, 2012
I implemented the 3560E switch, this one have two Giga bit ethernet/10-Gigabit Ethernet module slots. I used the Twin Gig Converter Modules and one SFP. All configuration was applied in the Ten Giga bit, however the interface giga bit ethernet is UP UP state and the Ten giga down down.
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Nov 3, 2011
I have three switches:
primary - Cisco Catalyst 3750G-24TS-24
and two SG300-28
I need to apply uplinks as follows:
3750G-24TS-24 SFP (1) -> SG300-28 (first) mini-GBIC (1)3750G-24TS-24 SFP (2) -> SG300-28 (second) mini-GBIC (1)SG300-28 (first) mini-GBIC (2) -> SG300-28 (second) mini-GBIC (2)
I would like to know, What type of mini-GBIC and SFP and cable I should use for SX Multimode?What max speed rate I will get?
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Jan 24, 2013
I have configured about 20 of these switches now, and notice in the port listings a TE1/1//1 TE1/1/2 and GI1/1/1 GI1/1/2 uplink port. There are only two uplink SFP+ ports. I now have a reason to install with a 1Gb uplink to the Core. I am using a GLC-LH module at each end. I did configure the TE1/1/1 port for the uplink. Does not work though..Do I need to configure the two GI1/1/1 and 1/1/2 ports for uplink, remove the TE configuration for the uplink to work? Using the UNIVERSAL code with a LANBase license.
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Jul 5, 2012
I was trying to uplink a switch today on a 1500m run of SMF. I have a 6509 core switch with a 16 port GBIC module. On that end I have a WS-G5486-LX with a 3m SC to LC patch cable.On the other end I have a 3750G with a GLC-LH-SM SFP. I have checked my fiber path and it seems good, (by sight, did not have an OTDR avialable).I can't get the link up at all. Tried swapping Tx Rx at one end, Tried different transceivers. Tried different patch cables. Nothing worked. At about the mid-point of my fiber run the cable passes through another network closet with a core switch for a separate network. If I break my fiber path there and try to connect in either direction it works. The only differences are the length of the fiber run and that the core switch on the other network has a CLC-LX-SM SFP.Is it the distance? Or is there some issue connecting a GLC-LH-SM to a WS-G5486-LX?
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Oct 31, 2011
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]
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Sep 5, 2012
our network is spread over 15 floors and each floor we have 5-6 switches. we are planning to purchase cat3750-x 24 ps poe with C3KX-NM-10G network modules. Each floor has two up links to the core switch with single mode fiber and other being the multimode.Suppose if we are purchasing 75 switches do we have to purchase 75 C3KX-NM-10 G modules.? or can we limit our purchase with 15 C3KX-NM-10G sothat two uplinks from each floor can be made? since network modules are optional cost factor is invovled. Or any issue with stacking ? the SFPs will be LR and LRM MODULES.looking for an answer ? whether the new usb type console cable comes bundled with cat350x or shall we have to order separately?
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Mar 5, 2012
I'm currently trying to diagnose a re-occuring problem with output drops on an uplink interface to a SonicWALL firewall, between 1am - 3am every night we receive alerts that the output drops (discards) counter has incremented.
This time frame happens to be when several network based backups are running so that's probably to blame for the added traffic count but I'm trying to narrow down what's actually dropping the traffic.
The switch hardware is a WS-C3750X-48 running C3750E-UNIVERSALK9-M , 12.2 (55) SE3.
My current thinking is that the output drops are indicative of congestion on the link to the SonicWALL indicating that the SonicWALL unit is incapable of processing the traffic flow fast enough thus causing the congestion and ultimately the output drops on the Gi2/0/48 interface.
According to SonicWALL the unit is rated at 1.5Gbps throughput without UTM services (pure stateful), and no UTM services are enabled.
I've posted a section of the show interface command:
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
[Code].....
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May 9, 2013
We have a remote site that is using 3750X switches as layer 2 switches back to our home site. The uplink port is showing dropped packets but the utilization on the link is never about 10%. We have a 100Mb circuit to this site. Our speed tests and iperf tests are not showing any issues that we can see. However the port is still droping packets. It is not dropping at a high rate but they are dropping.
switch#sh platform port-asic stats drop gi1/1/4
Interface Gi1/1/4 TxQueue Drop Statistics Queue 0 Weight 0 Frames 0 Weight 1 Frames 0 Weight 2 Frames 0 Queue 1 Weight 0 Frames 52876 Weight 1 Frames 2 Weight 2 Frames 0 Queue 2 Weight 0 Frames 0 Weight 1 Frames 0 Weight 2 Frames 0 Queue 3 Weight 0 Frames 0 Weight 1 Frames 0 Weight 2 Frames 1330874 Queue 4 Weight 0 Frames 0 Weight 1 Frames 0 Weight 2 Frames 0 Queue 5 Weight 0 Frames 0 Weight 1 Frames 0 Weight 2 Frames 0 Queue 6 Weight 0 Frames 0 Weight 1 Frames 0 Weight 2 Frames 0 Queue 7 Weight 0 Frames 0 Weight 1 Frames 0 Weight 2 Frames 0switch#
Is there a way to capture these dropped packets to see what they are? We do have VOIP phones at the site and are using Qos.
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May 28, 2012
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?
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Dec 15, 2011
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.
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Dec 3, 2011
I need a L2 switch with dual AC power supply and RJ45 uplink The optin I got was WS-C3560X-48T-L + C3KX-PWR-350WAC , but the problem is with uplink . There is no RJ45 1G uplink , there is only option for SFP uplink The another option was WS-C2960G-48TC-L , but there is no dual AC power supply option a good model ( Dual AC power supply , RJ 45 uplink ports (Gig) , with 48 port 100/1000 UTP)
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Feb 5, 2012
I have a new Cisco 2960 S series switch with a basic configuration that needs to be uplinked or daisy chained to a Cisco 3750 switch. I am not getting any connectivity to the network with either a straight through or crossover cable. the port remains in amber but a 'show interface' indicates that the interface is up. I can manage the switch with a PC patched into any port on the switch with a static IP address. Must be something very simple that I am missing. Outlined below is the configuration.
Refresh_SW1#sh ver
Cisco IOS Software, C2960S Software (C2960S-UNIVERSALK9-M), Version 12.2(55)SE3,
RELEASE SOFTWARE (fc1)
Technical Support: [URL]
[Code].....
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Jan 20, 2013
I 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?
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Apr 23, 2012
I need 10gigbit uplink for this switch. What are the other devices that i need order along with this device.And what is the diff between X2-10GB-LR= and CVR-X2-SFP.if i take CVR-X2-SFP, in future how can i upgrade from one gig to 10 gig?for current use i need 10gig support required. so what are all the other devices that i need to order.Fiber multimode and distance 15Mt only.
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Mar 28, 2012
I want to apply QoS policy on a particular VM for specified port range only. I have created following script file but that doesnt work. I mean it doesnt apply any policy on vm residing on Veth1.
config t
ip access-list acl_in
101 deny tcp any any eq 443
exit
[Code].....
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Dec 21, 2012
In my lab I have only one ESX server. On this server I am running VSM and vCenter (appliance).I am trying to get 1000v working however everytime I try to migrate my ports I get the following error:Network configuration change disconnected the host '192.168.0.10' from vCenter server and has been rolled back.fault.NetworkDisruptedAndConfigRolledBack.summaryIt seems that it doesn't like the fact that vCenter lives on the same ESX host as I'm trying to migrate. How I could get this to work?
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Dec 18, 2011
I want to configure snmp-traps regarding stpx (root-inconsistency, loop-inconsistency) on a Cisco Nexus 1000V. The command "show snmp traps" lists stpx as a trap that could be configured and which is not at the moment.
MKBE1NX1# sh snmp trap
--------------------------------------------------------------------------------
Trap type Enabled
--------------------------------------------------------------------------------
entity : entity_mib_change Yes
entity : entity_module_status_change Yes
entity : entity_power_status_change Yes
[code].....
Nothing about stpx... Is there some other way to configure more traps?
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Dec 21, 2011
Nexus1000V and I was wondering if there is a way to limit snmp access via access-list on the RO/RW community, as can be done on IOS. I can't find anything relevent on the Reference Pages
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Jul 8, 2012
We currently have redundant FWSM's and are planning a migration to standalone ASA 5500 series firewalls. However, we have a complete VMWare environment and are looking at the Nexus 1000V. I understand the Nexus 1000V and VSG architecture and implementation, and I do understand that the ASA 1000V is designed for cloud environments. But I do have one question about the ASA 1000V.
Is it possible for an ASA 5500 series firewall to be replaced by an ASA 1000V? Basically, can an ASA 1000V be a sole firewall solution, or are ASA 5500's still needed? Is there a datasheet anywhere that compares the ASA 1000V and ASA 5500 series?
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Sep 13, 2012
how do i set limit on the log file size in ACS 5.3. I had the same issue with Nexus 1000v but there is a command that enables you to set log file nane and size. it is getting bulky.
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Oct 3, 2011
According to the note at the bottom of a VMware KB Article "Cisco Nexus 1000V and VMware vCloud Director 1.5,"
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Is this actually the case? I know you could use portgroup based network pools with vCD 1.0 and 1kv. Can I use the 1kv with VLAN-backed network pools in vCD 1.5 without the Virtual Network Management Center or is it required?
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Jul 18, 2011
how to add tacacs custom attribute to ACS 4.2 for Nexus 1000V:shell:roles="network-admin admin-vdc"In the interface configuration I've added new service, service - shell, protocol - tacacs+.In the group settings I've enabled this attribute configuration. And it is not works. Default privilege level is assigned to any user with access allowed.
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