Cisco Switching/Routing :: 6513 / Port-channel Down But Duplicate Interface Created With (A) Up?
Nov 12, 2012
I have created 5 new 2 Gig port channels on a 6513 WS-X6516A-GBIC blade connecting to 5 4510R+E switches. 3 of the 5 Port-channels show up/up. 2 show down/down. However, for the 2 showing down, a duplicate Po interface was created with an "A" appended to the name that shows up/up. E.g:
Port-channel26 unassigned YES unset down down
Port-channel26A unassigned YES unset up up
Each of the 4510s has a second 2Gig PO to another 6513 with an identical config and all of those come up fine.
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Feb 24, 2012
We have 2 6513's that are linked via 2 10 gig interfaces, using an LACP channel.I received an alert this aft stating that the far 6513 was unreachable and the port channel int PO3 had gone down, the 2 10 gig interfaces had also gone down on either side. 5 mins later PO3 had resestablished itself and has been fine since. [code]
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Jan 15, 2012
a Customer ask me to configure a etherchannel between two Switches C3500 XL Version IOS 12.0 follow the first configuration what I done and the output error show me by switch:
Sw01(conf)# interface port-channel 1 % invalid input detected at '^' marker.
I have to do something before add an new port-channel interface ?? why the Sw01 does not accept my configuration ?
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Jan 12, 2012
how to configure this. I did it in the past but kind of forgot how I did it.I have a stacked 3750 (two physical switches) connecting to a 2960.
I am creating trunk ports with limited access to VLAN 300, 600, and 700.
There is two interfaces connected from the 3750's(one on each physical stack member) to the 2960.I have the physical interfaces configured exactly the same.
3750 Config:
interface Port-channel2
!
interface FastEthernet1/0/46
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1, 300,600,700
switchport mode trunk
speed 100
[code]....
Should I keep the configuration on the physical ports and not configure the Port-Channel Interfaces? Do I need to configure port-channel load balancing? Is the channel-group mode sufficient? Goal is to basically create 2 links to the 2960 to double the bandwidth and provide redundancy.
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Feb 20, 2012
Here is an example of what each switch logs when a server drops offline. Sample logs taken between 5:32am and 5:35am on Feb 20. This particular one was having problems all weekend. Switch #1 encountered over 2000 interface resets. The corresponding VPC port on Switch #2 only had 13 resets.
NEXUS SWITCH #1
2012 Feb 20 05:32:09 q91-sw01-5010 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel10: first operational port changed
from Ethernet1/10 to none
2012 Feb 20 05:32:09 q91-sw01-5010 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel10: Ethernet1/10 is down
2012 Feb 20 05:32:09 q91-sw01-5010 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel10: port-channel10 is down
2012 Feb 20 05:32:09 q91-sw01-5010 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel10 is down (
No operational members)
[code].....
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Oct 12, 2011
I have 6513 which have wism and sup 720 , for some reason the access points keeps on going up and down the port channels created automatically but i cannot see any configuration inside it as shown below .I tried to edit the interfaces and add the trunk configuration but it cannot be modified . [code] the Wism status is showing up but the APs Number regestered keeps on going up and down the version running on the sup 720 is 12.2(33)SXI5 and the wism is installed in slot 9.
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Feb 25, 2012
We have a Cisco 6513 Switch. During some parts of the day it is having large amounts of transmit discards on a certain interface because of the amount of data we are pushing. We have determined it is a link problem and not a problem with the switch. The link cannot handle the amount of packets the switch is pushing out. I was wondering if there is a way to create a buffer or a way to regulate the maximum amount of packets that can leave that interface without losing any packets?
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Apr 22, 2013
I have a query regarding the deletion and creation of one of my SVI interface on 6513 ,The reason behind it as follows.My traffic get to Internet in this manner
proxy(external int.)[IP:192.168.1.30] --> Gi0/9[6513 in VLAN 170] --> SVI VLAN 170[IP:192.168.1.10] --> Gi0/10[In VLAN 170] -->ASR[IP:192.168.1.20],I need to assign this VLAN ie 170 to my inside interface of firewall but it was mentioned in books like this "Assign the VLAN for the FWSM before it is applied to the MultilayerSwitch Feature Card (MSFC)." so I am thinking the following steps to assign VLAN 170 to firewall group first before creating SVI Interface for it
1.Remove all currently assign ie Gi 0/9 & Gi0/10 interfaces from this VLAN and then delete this VLAN.
2.Create the same SVI ie VLAN 170[IP:192.168.1.10] by this way the issue can be resolved.
As in part of my configuration PBR is define like this .
interface Vlan170
description "PUBLIC IP VLAN"
ip address 192.168.1.20. 255.255.255.0
ip policy route-map NAT
route-map NAT permit 10
match ip address 101
set ip next-hop 192.168.1.10
I need to clearify what impact it may have on PBR part if I delete and create the VLAN 170.Will the traffic move to the inside interface of FWSM.
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May 11, 2010
I've run in to this on 3750G's in a various sized stacks. We apply port security for a mac address on a single port (not existing on more than one port - that's a different issue that appears in multiple posts already).In this case:
1) We do a 'sho mac address-table and see that the device with the mac address in question lives on one port, port 1/0/x.
2) We apply mac port security for this exact same mac address to the same port it is already attached to. switch(config)#int g2/0/2 switch(config-if)#switchport port-security mac-address 001a.1ec8.abcd
3) Get this error: 'Found duplicate mac-address 001a.1ec8.abcd'.We again confirm that that is the only port on the entire switch that has this mac-address.Try the command again, same error.
4) We do a bunch of show commands, get in and out of the switch, go back and then try it again, and now it works, same command, same port and same mac address.
-Aging is default 300
-These are Cisco wireless AP's attached to the switch
-This occurs on different switches with different ports using different mac addresses, always same symptoms.
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Apr 17, 2013
If I monitor a trunkport on the rootbridge in both directions I get Duplicate Multicast Packets on the perticular VLAN. The first guess is, that this is worked as designed and not a IOS Bug (Platform CAT6500 SUP720 IOS 12.2(33)SXI9 ) Until know I only found an old Cisco press link from 2002 with this subject.
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Jan 18, 2012
Ask this question, if someone came across a 6513, one of the RJ45 ports are constantly falling.The question is how to disable logging on a specific portno logging event link-status does not work.
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Jan 21, 2012
I am having issues with 'telnet' on port 2821 to a range of servers connecting through vlan interface from my core switch 6513 running s72033_rp-DVIPSERVICESK9_WAN-VM) version 12.2(33)SXH7, RELEASE SOFTWARE (fc3). The telnet on port 1556 and 13724 is ok.
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Mar 2, 2012
I have two servers, connected on two(Different) 6513 directly connected switches. Both these servers are in the same Vlan.
I have to monitor communication these two servers. I have a system connected on one of the 6513 switch, where network tool wireshark is installed.
How to configure span port.
switch 6513-1# show run int Gi10/43 --------------------Server 1 is connected
switch 6513-2# show run int Gi9/45 ------------------------Server 2 is connected
switch 6513-2# show run int Gi9/46 ------------------------System on which network tool wireshark is installed.
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Oct 29, 2012
we have a chassis 6513-E and a module WS-X6748-GE-TX, I'd like to know if could I put this module in any slot, since the documentation from Cisco says that any slot from a chassis 6500-E Series can support this module. And then in the documentation of WS-X6748-GE-TX says that this module is not compatible in the slots 1-8 of the 6513 chassis, only from 9th to 13th slots, in those slots from the 6513-E we already have 4x WS-X6748-GE-TX, and we'd like to know if could we put the module in the rest of the slots. The 6513, and 6513-E is kind of confusing.
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Sep 2, 2012
I have Cisco 3845 with two Gigabit interfaces configured as port-channel with sub interface and with QoS. However shape does not work.
[code]...
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Sep 12, 2012
Have 2 N2K with dual-connections to both 2 N5K, will all 4-ports of N5K will be the same port-channel. N2K as well ?
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Nov 29, 2011
I need to configure a port channel between two sw 4507R. with port Giga, but those port are in different modules.
Sw-1
interface GigabitEthernet5/48
description **** Conexion Switch-2*****
[Code].....
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Feb 20, 2012
How much is the limit for the creation of PortChanel in a Core Switch 6509 and 6513?Is there a limitation byu hardware?
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Dec 7, 2011
I have 3750 core/distribution switches with routing enabled in two offices connected with copper link and L3 port channel interfaces. NewOffice#2 has moved about 5 miles farther away from office#1 and I have to deploy new core/distribution switch connect it to old core#2 via F.O and move all access switches with it. Old core will stay in old #2 offices as a bridge between office#1 and new office#2 Office#1core<->copper (Ethernet) <->oldoffice#2core<->f.o. <->new office#2core How I should configure port channels ports on oldoffice#2 core to act as bridge between office#1 core/dist and newoffice#2 core/dist without changing anything else (ip, etc) on whole network
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Apr 22, 2012
I have 2 Cisco 6509 switches linked together via single Fibre as a trunk.I want to change this to a port channel where I will add another 3 fibre ports to the port channel but what order do I do this to minimise any disruption.
1-Configure PortChannel and add the 3 new ports, this will bring up the Port Channel but what effect will this have on traffic currently going over the single Trunk link? Will spanning tree go mad, how will switches react?
2-Convert existing Trunk link to Portchannel then add in new ports to PortChannel, I guess in doing this there will be a small hit on traffic as it changes to a port channel.
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Feb 7, 2013
We are running nexus 5018 in our DC.What is the difference betwen "channel-group 214 mode active" and " channel-group 216" Any difference?.. because i have problem with this config we are going build a server config?
We have problem with porth channel down.
5K# sh int po71
port-channel71 is down (No operational members)
vPC Status: Down, vPC number: 71 [packets forwarded via vPC peer-link]
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Jan 22, 2012
I set up a port-channel trunk between a acess switch 3750 ( int gi2/0/1 and gi2/0/2) and Core 6509( int gi7/11 and gi7/12).
On the both the 3750& 6509 I configured:
interface Port-channel15
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 100,103
switchport mode trunk
But the ports on the core g7/11 and g7/12 keep shutdown and when I do show interfaces port-channel 15, it show the interface is shutdown.
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Sep 13, 2012
I have Cisco 3845 with two Gigabit interfaces configured as port-channel with subinterface and with QoS.However shape does not work, why? [code]
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Feb 27, 2013
I am building a new network and intended on using the min-link feature on my port-channels between a 3750-X series switch and Nexus 4k.
However reading further into this it seems this feature is only supported on higher end models. I cannot find any reference to the min-links feature in the 3750-X configuration guide. Is this an available feature?
The 3750-X model is WS-C3750X-24T-L running IOS 12.2(55)SE3 IP Services
My thoughts is that the is only an LACP supported feature so I may not see the command until I have entered an LACP specific command on the port-channel but unfortunately I do not have a 3750X to verify this on at present.
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Jan 17, 2012
We have one 3825 router used as voice gateway. For redudancy, we want to connect it to two different switches which has STP and HSRP running. Can I create a port-channel with two Giga interfaces in 3825 and connect to two different switches? Should I configure port channel in switch with only one port in each port-channel? I know server can be connected to different switches with NIC teaming. I just want to mimic that kind of setup. I did one time for port-channel in 3825, but it was connected to a stacked 3750X. So it's different case now.
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May 8, 2013
I am trying to configure port-channel from one switch to two switchs, and only one interface of each switches make part of the port channel.Cisco IOS Software, ME380x Software (ME380x-UNIVERSALK9-M), Version 12.2(52)EY4, RELEASE SOFTWARE (fc1) [code]
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Jan 22, 2012
I have a pair of 6500's setup with VSS and there is currently only one link between then. However one end of the link is on Po10 and the other end is on Po25. If I move the Po25 over to Po10, will things break? It seems to be working fine now. I'm about to add a second link and I'm concerned about the current configuration. It makes more sense to me to have both ends of the same link on the same port-channel ID. I've seen documentation which states otherwise however.
interface Port-channel10
no switchport
no ip address
[Code]....
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Mar 3, 2012
I am using 3560.IP rouitng is being turned off on this.Curious to know if I will create etherchannel or port channel.I think etherchannel.Correct me if I am wrong.On connecting switches I have vlan10,20,30 to be allowed.I am sure I need to allow these all vlan in 10,20,30 which are on the trunk port on each side switch.Post that will add channel-port lacp and make it in active mode.Is that correct.This way traffic will be load-balanced/aggregated on minimum 2 ports who are the part of this.
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Jan 27, 2013
Here's what I'm trying to do. We are having new storage servers installed that will be using NFS. I'm being told that they need to have their connections port channeled. Right now, the servers have connections to 2 different 3750s for HA. Is it possible to configure a port channel between these 2 connections?
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Apr 15, 2013
I have an inquiry about a configuration I deploy in a C2960 switch. I have configured a ether channel with 8 ports, the load balanced method is source mac address. The bundling protocol is LACP.
I have found the ether channel is not balanced as I expect. One of the eight interfaces is congested.
Code...
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May 13, 2012
We have a switch that, when configuring auto qos on and edge port facing video equipment, the upstream port channel drops. I was wondering if no auto qos would have to be configured on the member ports of the port channel prior to enabling auto qos on any other ports.
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Oct 30, 2011
I have a Cisco 6500 series switch with VS-C6509E-S720-10G ,I have two redundant supervisors between two chassis on the LAN with no add-on line cards ?
I need to know if I can use the redundant supervisor 10 Gb uplinks to form a layer-2 Port channel between the two 6500 switches as i do not want to use want to keep the port idle additionally I need more bandwidth between the two switches for my server farm?
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Apr 3, 2012
I have 2 cisco 6500 in a VSS configuration , All of my Lan access switches are Stack switches and every Stack is connected to the VSS in a Port-channel so basically this is a loop free environment with no blocked ports .As a best practice I left STP in the Background (mstp)which enhanced cisco features to STP should I configure on the Aggregator (6500-VSS) and on the Access switches ?
Because of my topology I dont see the need in configuring most features like Uplink Fast and Backbone Fast but I have configured Loop Guard in addition to UDLD on the 6500 Aggregation Switches (on the port-channels).On the access ports I have configured portfast , bpduguard and guard root (seems a little pointless to configure the two...)
1.should I Leave UDLD on and get rid of LoopGuard and configure Guard root instead ? since LoopGuard cannot be configured with Guard Root.
2.should I configure GuardRoot on access ports if I already have BpduGuard on them ?
3.Is there anything I need to configure on the physicall interface or is everything configured on the port-channel since STP reguards port- channel as a single interface ?
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