Hi All ,   We have dual homed connectivity to FEX from nexus 5k as below.   Nexus 5k-1  Eth 1/47 ----> Fex 100  -----> Eth 1/47 Nexus 5k-2 (VPC100 . Port-chhannel 100) Nexus 5k-1  Eth 1/48 ----> Fex 101  -----> Eth 1/48 Nexus 5k-2 (VPC 101, Port-channel 101 )    But by mistake onsite engineer has connected Nexus 5k-1 eth 1/48 to Fex 100 and Nexus 5k-1 eth 1/47  to Fex 101.   Means Ports on Nexus 5k-1 are mismatched as below.   Nexus 5k-1  Eth 1/48  (must be eth 1/47) ----> Fex 100  -----> Eth 1/47 Nexus 5k-2 (VPC100 . Port-chhannel 100) Nexus 5k-1  Eth 1/47 ( must be eth 1/148 ) ----> Fex 101  -----> Eth 1/48 Nexus 5k-2 (VPC 101, Port-channel 101 )    We have done FEX configuration on both nexus 5k switches. Today Onsite engineer will do correction for mismatched ports on nexus 5k-1 , cable will be swapped for ports eth 1/47 and eth 1/48 to have right ports connected to FEX 100 and 101 from Nexus 5k-1.   I would like to know if onsite engineer swaps the cables of fex 100 and 101 on Nexus 5k-1 , will the fex again go for loading of IOS from Parent switch ?   ** currently nothing is connected to Fex 100 and 101.   After swapping the cables on Nexus 5k-1 , what needs to be done so that ports on Fex 100 and 101 will work properly  ?  In case if i want both fex to download ios from parent switch after swapping cables what should be done ? Do I need to remove and connect back uplinks cables at FEX end so that IOS will download from the parent switch again ?   Actual scenario :  Nexus 5k-1  Eth 1/47 ----> Fex 100  -----> Eth 1/47 Nexus 5k-2 (VPC100 . Port-chhannel 100) Nexus 5k-1  Eth 1/48 ----> Fex 101  -----> Eth 1/48 Nexus 5k-2 (VPC 101, Port-channel 101 )    But onsite has connected cables as below.   Nexus 5k-1  Eth 1/48  (must be eth 1/47) ----> Fex 100  -----> Eth 1/47 Nexus 5k-2 (VPC100 . Port-chhannel 100) Nexus 5k-1  Eth 1/47 ( must be eth 1/148 ) ----> Fex 101  -----> Eth 1/48 Nexus 5k-2 (VPC 101, Port-channel 101 )    Fiber Cables connected to fex 100 and 101 on Nexus 5k-1 will be swapped today so that we have correct ports connected to both fex from both Nexus 5ks.    ... View more

Hi All , At my customer place I need to replace existing access switch ie cisco 4507R (End of life switch) with cisco 4948E switch. DBL is enabled on 4507R and below is the QoS part of cisco 4507 R switch (bootflash:cat4500-ipbasek9-mz.122-31.SGA9.bin ). qos dbl qos map dscp 24 25 26 27 28 29 30 31 to tx-queue 4 qos map dscp 32 33 34 35 36 37 38 39 to tx-queue 4 qos map cos 3 to dscp 26 qos map cos 5 to dscp 46 qos policy-map autoqos-voip-policy class class-default dbl Lan uplink ports on cisco 4507 R connected to Core switches which have below qos parameters. ------------------------------------------------------------------------------------------------------------------------ interface GigabitEthernet y/y description LAN uplink to Core Switch switchport trunk encapsulation dot1q switchport trunk allowed vlan 1,100-110 switchport trunk allowed vlan add 991 switchport mode trunk speed nonegotiate qos trust dscp tx-queue 1 bandwidth 480000000 bps tx-queue 3 bandwidth 20000000 bps priority high channel-group 11 mode active Voice server has below configuration. --------------------------------------------------- interface GigabitEthernetx/x description voice server switchport trunk encapsulation dot1q switchport trunk allowed vlan 100,102, switchport mode trunk speed 1000 duplex full qos trust dscp tx-queue 3 priority high shape percent 33 new 4948E switch does not support auto Qos , it has bootflash:cat4500e-entservicesk9-mz.122-54.SG.bin on it. Somebody can tell me QoS commands which can be enabled on 4948 E as similar to cisco 4507 R switch. For voice server its mandatory to have QoS on the port. Many Thanks. ... View more

Hi All , I have below switch at customer location and we are going to have nexus 2248TP-E FEX (supports a total of 48 100/1000BASE-T ports and four 10-Gigabit Ethernet uplinks (SFP+))  to connect server using 1 GB fiber ports. Uplink between 5548-UP and 2248TP will be 10 G ports. Can someone confirm whether all nexus 5000 series switches supports FEX ? Is there any limitations like what OS version switch must have ? Please also share me FEX configuration examples . Switch 1 # sh version Cisco Nexus Operating System (NX-OS) Software TAC support: http://www.cisco.com/tac Documents: http://www.cisco.com/en/US/products/ps9372/tsd_products_support_series_home.html Copyright (c) 2002-2013, Cisco Systems, Inc. All rights reserved. The copyrights to certain works contained herein are owned by other third parties and are used and distributed under license. Some parts of this software are covered under the GNU Public License. A copy of the license is available at http://www.gnu.org/licenses/gpl.html. Software   BIOS:      version 3.6.0   loader:    version N/A   kickstart: version 5.2(1)N1(4)   system:    version 5.2(1)N1(4)   power-seq: Module 1: version v1.0              Module 3: version v5.0   uC:        version v1.2.0.1   SFP uC:    Module 1: v1.0.0.0   BIOS compile time:       05/09/2012   kickstart image file is: bootflash:///n5000-uk9-kickstart.5.2.1.N1.4.bin   kickstart compile time:  3/19/2013 3:00:00 [03/19/2013 10:12:59]   system image file is:    bootflash:///n5000-uk9.5.2.1.N1.4.bin   system compile time:     3/19/2013 3:00:00 [03/19/2013 12:10:47] Hardware   cisco Nexus5548 Chassis ("O2 32X10GE/Modular Universal Platform Supervisor")   Intel(R) Xeon(R) CPU         with 8263848 kB of memory.   Processor Board ID XXXXXXXXXX   Device name: XXXXXXXX   bootflash:    2007040 kB Last reset   Reason: Unknown   System version: 5.2(1)N1(4)   Service: plugin   Core Plugin, Ethernet Plugin switch 1#  sh module Mod Ports Module-Type                       Model                  Status --- ----- --------------------------------- ---------------------- ------------ 1   32    O2 32X10GE/Modular Universal Plat N5K-C5548UP-SUP        active * 3   0     O2 Daughter Card with L3 ASIC     N55-D160L3-V2          ok Mod  Sw              Hw      World-Wide-Name(s) (WWN) ---  --------------  ------  -------------------------------------------------- 1    5.2(1)N1(4)     1.0     -- 3    5.2(1)N1(4)     1.0     -- ... View more

Hi All , Three switches are stacked as shown in the diagram , which was set long back by one of the network engineer.   Switch 3 --->  top switch in the stack - manually set stack priority as 15. Switch 2  ----> middle switch in the stack -- manually set stack priority as 13. Switch 1 ----> bottom switch in the stack  -- manually set stack priority as 14.   During the UPs maintenance activity at the customer site , we are following below sequence while powering down switches. Switch 2 then Switch 1 then switch 3 will be powered down.   I would like to change stack priority of switch 2 as 14 and Switch 1 as 13 . Question 1: If I change the stack priority on switch 2 and switch 1 , do I need to reboot whole the stack so that new priorities for switch 2 and switch 1 would change to new values. Any precautions should be taken while changing stack priority on switch 2 and switch 1 . Note : Three switches are running same IOS on them.   Question 2 : Stack cable connected between switch 2 and switch 1 is not detected.We have checked the "stack" status by reconnecting the cable between them but no luck.   How to check whether its stack cable problem or stack port problem on respective switch.   Customer Switch 1 #sh switch detail                                             H/W   Current Switch#  Role   Mac Address     Priority Version  State  ----------------------------------------------------------  1       Member ---------------    13     3       Ready                 2       Member ---------------    14      3       Ready                *3       Master --------------     15     3       Ready                           Stack Port Status             Neighbors      Switch#  Port 1     Port 2           Port 1   Port 2  --------------------------------------------------------   1       Down        Ok              None       3    2        Ok        Down               3      None   3        Ok         Ok                1        2    Thank you..       ... View more

Hi All , Stacking is done as per enclosed file. top switch is switch 3 which is master which has stack priority of 15 (manually configured stack priority)  Middle switch is switch 2 which is a member switch and has stack priority of 13 (manually configured stack priority)  Bottom switch is switch 1 which is also a member switch and has stack priority of 14 ( (manually configured stack priority)    I would like to change stack priority of Switch 1 as 13 and switch 2 as 14 as it would be very easy to follow sequence when power down and power on of switches are planned during any power down activity at customer site.   If I change the stack priority of Switch 1 and Switch 2 manually and if I reboots stack switches , will there be any effect to switch 1 and switch 2. After reboot will they get new priority as set ? any precautions to be taken care while changing stack priority of Switch 1 and Switch 2 manually. And also we have stack cables connected to switch 1 and 2 but its showing as down..Stack cables are connected properly but still stack between switch 1 and switch 2 is down as below.   How to resolve stack issue between switch 1 and switch 2.   Customer Switch 1 #sh switch detail                                             H/W   Current Switch#  Role   Mac Address     Priority Version  State  ----------------------------------------------------------  1       Member ---------------    14     3       Ready                 2       Member ---------------    13      3       Ready                *3       Master --------------     15     3       Ready                           Stack Port Status             Neighbors      Switch#  Port 1     Port 2           Port 1   Port 2  --------------------------------------------------------   1       Down        Ok              None       3    2        Ok        Down               3      None   3        Ok         Ok                1        2      Thank you..                 ... View more