Cisco Switching/Routing :: Nx 5548UP After Reboot Log Shows Vpc Down

May 23, 2013

We have a Nx5548up pair connected to FI6248 via a vPC. We had to reboot a FI (in order to configure more FC ports) ; following that reboot, we meet many issues.The first log shows the vPC down showing the FI rebbot.2013 May 23 12:31:45 sw-n5kup-fr-eqx-01 %ETH_PORT_CHANNEL-5 PORT_INDIVIDUAL_DOWN: individual port Ethernet1/2 is down

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Cisco Switching/Routing :: Nexus 5548UP VPC Configuration

Jan 26, 2012

I have followed every piece of cisco documentation I could find on this and I still can't get vPC configured to actually work.  The VLANs stay in a suspended state so no traffic flows across.  Below is my configuration:vrf context management  ip route 0.0.0.0/0 10.86.0.1vlan 1,vlan 86  name I.S_Infrastructure,vpc domain 1  role priority 1000  peer-keepalive destination 10.86.0.4,interface Vlan1,interface Vlan86  no shutdown  description I.S._Infrastructure  ip address 10.86.0.1/24,interface port-channel1  switchport mode trunk  vpc peer-link  spanning-tree port type normal,interface Ethernet1/1  switchport mode trunk  channel-group 1 mode active,interface Ethernet1/2  switchport mode trunk  channel-group 1 mode active ,interface Ethernet1/3,escription Connection to Mgmt0  switchport access vlan 86  speed 1000.

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Cisco Switching/Routing :: Change Airflow Of The Nexus 5548UP?

Aug 6, 2012

is it possible to change the airflow of the Nexus 5548UP in the field by replacing fan and power supply or must the correct airflow been ordered.

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Cisco Switching/Routing :: Nexus 5548UP / Two Management Interfaces For N5k

Jan 10, 2013

I have a Nexus 5548UP that would be managed by two organizations. Is it possible to set IP addresses for mgmt0 and an SVI (or an L3 interface) without using the L3 daughter card? I don't want to route between VLANs, just to separate management traffic.

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Cisco Switching/Routing :: Nexus 5548UP / L3 Cannot Do Inter-VRF Communications?

Aug 28, 2012

I'm trying to get a node in SVI1 on VRF1 to speak to another node in SVI2 on VRF2 to reach each other.  After hours of failure, I went to outside resources.  Everything I read on the internet says it's not possible on this platform and at least one TAC engineer seems to agree.
 
I just can't believe such a high-end data center switch is not capable of handling such a basic feature.

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Cisco Switching/Routing :: Replacing C4507R-E With Nexus 5548UP?

Jul 25, 2012

We currently have an environment with a 4507 as the core switch connected to four stacks of 3750e's in the wiring closets. A pair of Nexus 5548UP's also hangs off the 4507, but at the moment more or less dedicated to a certain purpose..The 5548UP's have the L3 daughter card installed.
 
My question is: Can a pair of Nexus 5548UP's do a C4507's job? Would we be able to decomission the 4507 and replace with the existing 5548UP's + FEXes?

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Cisco Switching/Routing :: Nexus 5548UP VPC Domain With 1x L3 Card

Apr 9, 2013

I can't find anywhere whether it is possible to create a vPC domain with 2 Nexus 5548UP switches, where only 1 Nexus 5548UP has a L3 daughter card.

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Cisco Switching/Routing :: Nexus 5548UP To 2248 Design

Aug 10, 2012

This past networkers I was at the Cisco booth discussing how the 2248 can connect to the 5548 and have server connectivity.  It was told to me that now, as of a fairly recent NX-OS release, you can have the 2248 going dual-homed to both 5548 via VPC and then have a server connected to both 2248 and be in active-active mode.  Is this correct?
 
When we first deployed our 5548 and 2248 we had to put the 2248 in a straight pin mode, where it only had connections to one 5548 and then the server would dual connect to the 2248's and be in active-active mode.  I was told that this changed with an NX-OS release however documentation still seems to be fragmented on what exactly is the case. 

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Cisco Switching/Routing :: Nexus 5548UP - Management Interface

Apr 21, 2013

How separate is the management interface on a Nexus 5548?
 
In context - what's the risk of having a layer 2 only Nx5K in a DMZ and running the managment ports down into an internal managment VLAN, to form peer-keepalive links and software upgrades.

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Cisco Switching/Routing :: How To Let Nexus 5548UP Act As DHCP Server

Nov 14, 2011

it's possible to let the Nexus 5548UP act as a DHCP server? (or if it will be possible in future releases)

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Cisco Switching/Routing :: Nexus 5548UP - FCoE QoS Configuration

Dec 6, 2012

I am looking to implement a QoS policy on a pair of Nexus 5548 UPs. FCoE is a factor here. I have created the following configuration and would like to get a few pairs of eyes to take a look at this for a quick sanity check.
 
How to make sure this config is valid. Also, I realize I'm applying an MTU of 9216 to all classes right now, this will be phased out incrementally.
 
class-map type qos match-all class-platinum
  match cos 5
class-map type qos match-all class-gold
  match cos 4
class-map type qos class-fcoe
  match cos 3
[code]....

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Cisco Switching/Routing :: Add 2 X Nexus 5548UP Switches At Site 1

Mar 5, 2013

I have 2 sites located approximately 30 kilometers apart.  I will call them site 1 and site 2.The sites are connected by a Layer 2 1GB fibre connection.I would like to add 2 X Cisco nexus 5548UP switches at site 1 and connect these 2 X Cisco nexus 5548UP switches via GLBP
 
I would then like to add 2 X Cisco nexus 5548UP switches at site 2 and connect these 2 X Cisco nexus 5548UP switches via GLBP.I would then like to connect the 2 X Cisco nexus 5548UP switches at site 1 and the 2 X Cisco nexus 5548UP switches at site 2 via GLBP.

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Cisco Switching/Routing :: Nexus 5548UP With L3 Card / Inter-VRF Not Possible?

Aug 28, 2012

I just received a Nexus 5548 to configure as the core of the Datacenter LAN.  Is it true that the VRFs created cannot talk to each other???  I can't seem to find any documentation on how to do this and at least one TAC engineer half-heartedly believes it's not possible, either.
 
Basically, I'm trying to get an SVI in VRF1 to be able to talk to an device on another SVI in VRF2.
 
I can't believe this high-end switch, that is so capable in every regard, cannot handle this feature.

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Cisco Switching/Routing :: Nexus 5548UP Switches - Load Balancing?

Mar 10, 2013

The best option for load balancing between 2 X Cisco nexus 5548UP switches located at one site and connecting to 2 X Cisco nexus 5548UP switches located at another site.
 
The sites are connected via a 1GB fibre connection. I am unable to use GLBP until GLBP is supported in further software releases.

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Cisco Switching/Routing :: LLDP Chassis Discovery On Nexus 5548UP?

May 1, 2012

I'm seeing several error messages like these in the logs of my Nexus 5548UP switches.

2012 Apr 24 16:39:41.470 SSV_5K_SW2 %LLDP-5-SERVER_ADDED: Server with Chassis ID aaaa.bbbb.cccc Port ID mgmt0 management address X.X.X.X discovered on local port mgmt0 in vlan 0 with enabled capability Bridge
 
2012 May  2 05:05:00.627 COR_CCO-NX-5548-UP_01 %LLDP-5-SERVER_REMOVED: Server with Chassis ID aaaa.bbbb.cccd Port ID aaaa.bbbb.cccc on local port Eth1/1 has been removed
 
2012 May  2 05:06:40.328 COR_CCO-NX-5548-UP_01 %LLDP-5-SERVER_ADDED: Server with Chassis ID aaaa.bbbb.cccd Port ID aaaa/bbbb.cccc management address NIL discovered on local port Eth1/1 in vlan 0 with enabled capability None
 
I will say that these 5548s are serving as the distribution layer for a UCS chassis (2x 6120 FIs) but didn't know what kind of visibility the Nexus would have into that - the chassis keyword is what's alluding to this in my mind, and I'm seeing these messages whenever interfaces that connect downstream to the fabric interconnects are brought up or down.

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Cisco Switching/Routing :: Nexus 5548UP Connectivity With Router 2811

Aug 15, 2012

In the existing network we have Cisco 2811 router connected to Corporate MPLS cloud. Cisco 2811 is connected to Catalyst 6509 switch(set based IOS with MSFC card). Along with that we have two Catalyst 5509. We are upgrading the access layer by replacing catalyst switches with Nexus 5548 & 2248.
 
For a purpose of testing I have connected 5548 & 2248. Created cPC and ether channels between two. SVI and HSRP configuredon 5548. I am terminating 2651 (test router) on 2248 port 101/1/1. On 5548 I have enabled EIGRP on vlans. I am unable to ping to 2651 from nexus switch 5548 and vice-versa. I can see both devices on CDP but I do not see eigrp neighborship formed.
 
What configuration should go in 2248 and 2651 in order to establish a connection between two? If test is successful then I will connect 2811 to 2248 during actual migration. I assume that in testing if it works for 2651 then it must work on 2811 router.

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Cisco Switching/Routing :: Nexus 5548UP Change Peer Keep Alive Link

Apr 19, 2013

I have a pair of Nexus 5548UPs that have some high priority servers running on them.  Servers are ESX hosts running Nexus 1000v's.  Each host has multple connections in a VPC to both 5548s.  We have been having intermittant ping loss and slowness of traffic to the VM's on these hosts.  I was poking around trying to figure out what the issue could be and found that the peer-keepalive command was not set to send the heart beat across the mgmt0 interface.  I would like to change this to point it accross the mgmt0 interface. Any tips or advice for me on making this change with production servers running on the switches?  I do not want to cause any loss to any systems when I make this change. [Code] ..........

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Cisco Switching/Routing :: Nexus 5548UP - (Physical Address Changes) Messages In SolarWinds

Dec 9, 2012

We have recently upgraded oor LAN and we are using couple of Nexus5548UP switches in the core with 2960 stacks as access switches. Each access switches stack is connnected to both core switches with link being port-chanels and VPCs. All is working fine, but our SolarWinds management platform (NPM) is being flooded with "Physical Address changed" events. Here is an example of messages:
 
NSW_Core_2 - Ethernet1/7 Physical Address changed from 000000003811 to 73616D653811
NSW_Core_2 - Ethernet1/7 Physical Address changed from 200B82B43811 to 000000003811
 
For each interface I have messages like these repeating.I am not sure what those messages means or if there is actually anything wrong. Performance of the network is good, there are no errors on any interfaces and I do not see anything related in the switch loggs.

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Cisco Switching/Routing :: Nexus 5548UP With 2232TM Fabric Extender And Server Teaming

Oct 11, 2012

Need clarification on the VPC with 5k and 2248 Fabric Extenders. My question  is can each fabric extender uplink to two different 5ks, and  at the same time, have servers connected to two both fabric extenders with a VPC.So basically, the server NIC will team with two different fabric extenders, and each fabric extender will connect to two different 5k's.

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Cisco Switching/Routing :: Enable Jumbo Frames On Single VLAN (Nexus 5548UP)

Sep 17, 2012

We are currently using two Nexus 5548UP's as our Datacenter Network Core.  I have a pretty simple objective:  I would like to enable Jumbo Frames on a single VLAN only(VLAN 65).  This VLAN is used strictly for backups.  I do not want to enable Jumbo Frames on the other VLANs(VLANs 1-10).  Im not sure what the best way to do this is.....or if it is even possible but I am hoping to get some configuration examples.

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Cisco Firewall :: 5510 - ASDM Shows Only One Context After Reboot

Sep 16, 2012

On our ASA 5510 we have two security contexts. After opening ASDM I can see and manage admin context, but cannot see second context. I can do changes to second context via CLI but as probably you know it's easier and quicker doing it via ASDM.

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Cisco Switching/Routing :: 4500 Ports Shows Only 0 Bit/Seg

May 20, 2012

I have installed a WS-X4448-GB-RJ45 on a 4503 chasis. I could not get input or output rate, just shows 0 bit/seg wether or not is forwarding traffic. I would like to know if I have to make any configuration or workaround. The IOS version is 12.2(37)SG1.

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Cisco Switching/Routing :: 819 Logs Cleared After Reboot

Apr 16, 2013

I have a remote 3G Cisco router (Cisco 819) that occastionally drops it's EzyVPN and the local guys just reboot the device so when I log on and check the logs it is empty.  My syslog server shows very little, can I keep the logs locally or up the logging to the syslog server?

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Cisco Switching/Routing :: 3560X Crash And Reboot On IOS 15.0(2)SE

Jan 24, 2013

I have 3560X-24T-S switches with IP Services loaded at remote sites that I have been having troubles with.  Originally, they had IOS 12.2(58)SE1 on them.  I have up to four diverse paths via point-to-point microwave at the remote sites.  The Microwave equipment is by Microwave Networks and is a Prodeus M series which Ethernet support.  The original issue manifested itself as hardware loopback errors on some of the ports that were connected to the microwave links.  
 
My experience in the past has been that when a hardware loopback error occurred it is usually a bad switch port.  In this case however, if I disconnected all of the microwave Ethernet links and rebooted the switch and then connected the Ethernet connections to the microwave links again, everything works fine.  No hardware loopback errors.  That is, until the next switch reboot.  Then the hardware loopback error would return.  Interestingly, it would come back on different ports connected to the microwave links every time.  So if a reboot was done without disconnecting the microwave Ethernet links the hardware loopback error would change from one microwave link to another after each reboot.
 
I then went through and read the lengthy release notes for IOS version 15.0(2)SE and found several fixes that I thought could fix my issue.  So I downloaded it and updated a couple of the offending switches (not all of them were having this problem).  After going through the second update required to resolve the 'open file error' that happens going between 12.2(58)SE1 and 15.0(2)SE the problem seemed to be resolved on the offending switches.  So, I went ahead and updated the IOS on all of the switches with point-to-point microwave connections.
 
I now have one switch that was updated that is crashing and rebooting continuously when the Ethernet links for the point-to-point microwave are connected.  Again, if I disconnect all the microwave links and reboot, it comes up fine ands stays fine when the microwave links are connected back up.  It will work fine until the next reboot and then the crash and reboot loop starts over again.  Below is a portion of the putty log when the crash occurs:
 
----------------------------------------------------------------------------------------------------------------------
previous memory block, bp = 0x59BF838,
memorypool type is Processor
data check, ptr = 0x59BF860
========= Dump bp = 0x59BF87C ======================
  59BF77C:        0        0        0 FD0110DF AB1234CD FFFE0000       56  383FDB4
59BF79C:  212AC68  59BF838  59BF6F4 80000042        1        0  A504F53 543A2050
59BF7BC: 6F727441 53494320 506F7274 204C6F6F 70626163 6B205465 73747320 3A20456E

[code].....

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Cisco Switching/Routing :: 6509 Goes In ROMmon On Reboot

Jul 24, 2011

I am facing a problem with a cisco 6509 that goes into rommon every time i restart. If i give the command
 
rommon 1> boot
 
it will pick up the IOS on the sup-bootdisk: or bootdisk: and boots up but i dont understand why on reboot it wont pick up this IOS and boot itself and why do i have to write boot command everytime on rommon.
 
I have also explicitly given the command "boot system bootdisk:IOSNAME.bin" in the startup config file but still no luck.

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Cisco Switching/Routing :: 3560CG Shows 0 Traffic In Class-map?

Apr 10, 2012

I tried to put QoS in a  WS-C3560CG-8TC-S  version 12.2(55)EX2.It shows 0 traffic in class-map. Here is the config My question is why I can not see the traffic via class-map?it should in the default Q if incorrect mark.I erased the config and config with the autoQoS, shows the same result. 

class-map match-any VoIP  description Voice IP Phone RTPmatch access-group 157
class-map match-any WEB  description Internal Web, SSL Web, DNS query, Pinnaclematch access-group 153
!
policy-map QOSMARK
class VoIP  set dscp ef 
class WEB  set dscp cs3 
class class-default  set dscp default

[code].....

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Cisco Switching/Routing :: 6513 - Switch To SP Mode After Reboot

Mar 20, 2013

Need your expert input in sorting out the below problem.I have a cisco 6513 switch which is going into SP mode after a reboot whci i have done during BCP activity in my organization.Below are the log for your reference.
 
Code...

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Cisco Switching/Routing :: 2821 Router Hangs And Reboot

Nov 13, 2012

Yesterday my router was hangs and my services was stuck. I start the router hard booted and it works fine.This was second time i was facing this kind of scenario. The attached are the "show tech support" of the cisco router 2821.

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Cisco Switching/Routing :: 6504 / Supervisor 720-3b Reboot Loop?

Apr 14, 2007

We recently wanted to swap our existing WS-SUP720-base with a WS-SUP720-3B in a 6513 chassis.Had the existing configuration config saved in a txt file and replaced the supervisor. Booting went fine and we pasted in the original config. There was one failure message about unnsupported command but didnt take further notice."boot system flash sup-bootflash:" was probaly the line that the 720-3B didnt support.After wr mem and reload it went in continious loop and rebooting due to inncorrect boot device. Had to put back the old supervisor and have now the 720-3B in a 6504 chassis. Tried some commands in rommon, but are not getting any further.

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Cisco Switching/Routing :: 6500 - Reboot With Crash Info

Oct 25, 2012

Our 6500 was reboot by self with crash info and i found it was happened by CPU HOG. The log is below for CPU HOG and you can see many times from attached crash info file.
 
%SYS-SP-3-CPUHOG: Task is running for (16000)m secs, more than (2000)m secs (15/12),process = RPC pagp_switch_mp2sp.
[code]....
 
I think this process made high CPU & memory issue and then there were internal communication fail.. isn't it? So i need to know what PRC pagp_switch_mp2sp is to prevent next issue.

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Cisco Switching/Routing :: Cat 2960 Shows Mac Address Port As Dropped?

Jul 30, 2012

I am configuring a Cat 2960 port for connecting a VOIP phone, authenticated by MAB.  On connecting the phone, I get the port authenticated and assigned to the correct VLAN, with LLDP-MED advertising the correct voice vlan.  However, I then see no traffic from the phone on the switch.  I can see the MAC address of the phone is learned in the right VLANs, but the mac address is showing as "Drop", which normally means the address is statically configured to be blocked.  There is no static mac address table blocking configured on the switch. 

Switch Version
Switch Ports Model              SW Version            SW Image
------ ----- -----              ----------            ----------
*    1 50    WS-C2960-48TC-L    15.0(1)SE3            C2960-LANBASEK9-M
 Port configuration
interface FastEthernet0/1
description "Standard user port"

[code].....

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Cisco Switching/Routing :: 4500E SUP7L-E Shows Error In Log After Upgrading

May 14, 2012

I upgraded IOS-XE on 4500E (SUP7L-E) to cat4500e-universalk9.SPA.03.03.00.SG.151-1. I encounter the log when i try to issue write mem commad
% VRF table-id 0 not activeCompressed configuration from 8947 bytes to 2140 bytes[OK].

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Cisco Switching/Routing :: 2960-24TC-L Switch Started And Shows Up

Sep 10, 2012

My 2960-24TC-L switch is startet up and shows up: switch.Have tried to upload new image with xmodem without success.There must be a procedure to upload the new image, I have looking for hours and can not find the procedure.

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