Cisco Switching/Routing :: Configuration Of Etherchannel Between 3750 / 6506

Feb 17, 2013

seeking for configuration assitance on etherchannel between catalyst 3750 and 6506

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Cisco Switching/Routing :: 3750 / Stack Switch With Etherchannel Configuration

Dec 20, 2012

I have stack of 2 switches 3750?I config etherchannel between them.
here is result
2      Po2(SD)         LACP      Fa1/0/15(I) Fa2/0/15(I)
Both ports are up up but standalone Int port channel 2 is down down.Need to know if this is default behaviour when we config etherchannel between stack switches?

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Cisco Switching/Routing :: Cannot Test EtherChannel Load Balance On 6506?

Sep 7, 2012

I'm have ether channel between CISCO 6506 and CISCO 3750X. I'm set load-balance ip-src from 6506 side and dst-ip from 3750 side. i'm try test etherchannel for detect physical link for test ip. On 3750 all work, but on 6506 i'm get error: test etherchannel load-balance interface port-channel 1 ip ^ % Invalid input detected at '^' marker.

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Cisco Switching/Routing :: Etherchannel Does Not Go Up / Up From 3750 Stack To 6k5 Vss

May 19, 2012

We have two 6k5 configured as vss and it is working fine. For each floor we have a 3750 stack. In each 3750 stack we have 4 switches. From the first 3750 we have a fiber link to the first 6k5 and from the fourth switch we have another fiber link to the other 6k5 switch, for each floor/3750 stack, both configured as etherchannel. We installled each 3750 stack/floor in different maintenance windows; in all these installations we have problems configuring the etherchannel. After we configure the etherchannel on 3750 stack and in the vss, the etherchannel does not go up/up. We see the etherchannel up/down; after a lot off work, try and error, configuring shut/ no shut, adding and excluding links from the etherchannel; in any aleatory moment the etherchannel goes up/up and works fine. Is there any bug related with these IOS versions, or is there any right procedure to configure etherchannel from vss to 3750 stack?

3750 stack config (IOS
Cisco IOS Software, C3750 Software (C3750-IPBASEK9-M), Version 12.2(50)SE1, RELEASE SOFTWARE (fc2))
interface GigabitEthernet1/0/1switchport trunk encapsulation dot1qswitchport trunk allowed vlan 100,101,371,372switchport mode trunkchannel-group 1 mode on!interface GigabitEthernet4/0/1switchport trunk encapsulation dot1qswitchport trunk allowed vlan 100,101,371,372switchport mode trunkchannel-group 1 mode on!interface Port-channel1switchport trunk encapsulation dot1qswitchport trunk allowed vlan 100,101,371,372switchport mode trunk


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Cisco Switching/Routing :: Setting Up Etherchannel Between 3750 And SG200

Jul 6, 2012

I was configuring link aggregation between a Cisco3750 and Cisco SG200 and the switched network went down just a few minutes after the port channel came on.I rebooted the SG200 and all hosts came back up for a minute before I lost them again. The etherchannel was between two trunking ports. I never set link aggregation on the SG200, could that be the reason? All machines are connected to the SG200. The 3750 is only being used as a layer 3 device for inter vlan traffic.

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Cisco Switching/Routing :: 3750 - Losing Connection With Etherchannel

Jun 20, 2012

We have a new building where we added 3 network closets with 3750x stacks.We have 2 fiber gig ports connected to 2 microwave units and etherchanneled the to ports
We have the same setup at the corporate office except the connection is 2 fiber gig ports on a 6509. The 6509 is doing the routing
Now the problem is that we lost the connection to the management interface on only one of the three closets after a few days running. But some workstations at the corp office could reach it... others could not. The workstation were on the same VLAN. We solved the problem for a few days by shutting on of the fiber ports on the etherchannel. But is started happening again... now with PCs being installed at the new location.
The PC that was not working on the 3750x side could ping across to the 6509 but no further then that. It seems like an arp issue not routing because some devices are reachable and fully operational throughout the network.
Here is the configuration:
3750x:Cisco IOS Software, Version 12.2(55)SE1 
Current configuration : 118 bytes!interface Port-channel1switchport trunk encapsulation dot1qswitchport mode trunkno snmp trap link-statusend
!interface GigabitEthernet1/1/1description 2gig to STB-6509switchport trunk


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Cisco Switching/Routing :: 3750 Etherchannel Between 100mb To 1Gb Ports?

Jun 4, 2013

I'm trying to configure and etherchannel between 2 switches.  A 3750 and a 3750G, but the port channel is down: 3750. [code]

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Cisco Switching/Routing :: Slow Throughput Between 3750 Etherchannel

Apr 23, 2013

We've installed cisco devices accross our site in the last year or so and slowing getting on top of it now. How ever our old unmanaged kit seems to be out performing it. It's most like down to my misconfiguration which has lead me to here. Below is the details of hardware and configuration between devices. 3750 Core consisting of the following stacked. [code] I've got MRTG monitoring traffic and the throughput seems to max out 24m/s,

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Cisco Switching/Routing :: 3750 - EtherChannel Cross-Stack With EMC VNX

May 22, 2013

We are configuring a new EMC VNX, and plan to use Ether channel with our 3750x stack.  We would like to configure it for both additional bandwidth and for redundancy.  What is the best configuration to use?  Should we trunk the channel or use switch port mode access, and use channel-group on or protocol LACP (which state active or passive)?

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Cisco Switching/Routing :: 3750 / Link Usage Of Etherchannel?

Aug 5, 2012

For etherchannel of 2 links on a 3750 switch, if 1 link ever gets saturated, will the other link be used as well if the excess traffic is part of the same flow?Or that excess traffic will simply be dropped?

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Cisco Switching/Routing :: 3750 - Etherchannel Across 2 L3 Switches To Stack

Mar 26, 2012

I am wanting to etherchannel from a 3750 stack to core Layer 3 switches (also 3750) with a cable going to each core switch, I have put both core switches and the stack under a 28bit subnet mask, but I dont seem to be load balancing across both links.

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Cisco Switching/Routing :: Unable To Save / View Configuration On 6506?

Jan 24, 2012

We are facing problem with cisco 6506 switch while configuring when we try to save it, we are not able to save the config, neither we are able to view running and startup config.

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Cisco Switching/Routing :: Catalyst 6506 Vlan-based Qos Configuration?

Feb 12, 2012

I was unable to configure vlan-based qos on Cisco IOS Software, s72033_rp Software (s72033_rp-IPSERVICESK9-M), Version 12.2(33)SXH6, RELEASE SOFTWARE (fc1) Seems to me my configuration is not working. Here is the output of the interface:
sh int G1/6 | i rate
Queueing strategy: fifo
30 second input rate 25231000 bits/sec, 4282 packets/sec
30 second output rate 46940000 bits/sec, 9257 packets/sec
And here is my configuration:
interface Vlan3
ip address
service-policy input TEST_IN_PMAP
service-policy output TEST_OUT_PMAP


Why I can't see matches in ACLs? I've double checked the direction and seems to me it is correct. I can't see matches even I configure something like this:

10 permit ip host any 
20 permit ip any host

Why my output rate is higher than 30M? Is it bacause there is no matching traffic here in ACLs? I'm absolutely shure that this host with such ip connected to this interface:

#sh arp | i
Internet           0   feed.beef.f00d  ARPA   Vlan3
#sh mac address-table |  i feed.beef.f00d
*    3  feed.beef.f00d   dynamic  Yes          0   Gi1/6

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Cisco Switching/Routing :: Cross Stack EtherChannel From 3750 To 2960

Mar 25, 2013

We have a pair of WS-C3750X-24T-S in a stack and four WS-C2960S-48TS-L in a stack of their own. There is not really anything too fancy configured (no special VLAN configuration/trunks or etc.) but the 3750 do have two ports configured as L3 for routing. We are not trying to use those ports for EtherChannel. These devices are running IOS 12.2(55)SE3 Essentially we are attempting to make an EtherChannel group using port 48 on all four of the 2960's in their stack (four ports). On the 3750 we will configure an EtherChannel group using port 23 and 24 on both switches (four ports). We then connect them up to form a four member EtherChannel.The ports on both ends are configured as mode ON and they are all 1Gb ports. I elected mode on because I understand at least one of the EtherChannel protocols will not work cross stack. What I would like to ask is whether the above configuration is possible or are we hitting some sort of limitation of EtherChannel cross stack, etc..? I cannot find anything to suggest this configration is invalid, but thought I would ask to see if I missed something in the EtherChannel articles.

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Cisco Switching/Routing :: 3750 EtherChannel / Stacking In Core Layer

Nov 23, 2011

As we know there are three layer in cisco Network Model:
So my question is  in Core / Distribution layer should i use Etherchannel between switches or use Stacking if switches are stackble.For ex: suppose I have two cisco 3750 switches . so should i use etherchannel between them or use stacking in core layer?What are the advantages and disadv of both.

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Cisco Switching/Routing :: Etherchannel - Redundant 6500 To 3750 Datacenter Switch?

Mar 27, 2012

I have 2 6504's running HSRP as my core.  They are each etherchannel'd to my Datacenter switch (3750 Stack) -- see image below.The problem i a having is with the etherchannel status:

Core1 PO11 status w (waiting)
Core2 PO11 status P(bundled)

DC11 PO48 status P -- but only to Core2 - the interfaces to Core1 are suspended. (See attached configuration documents)  None of the devices have any information in the logs.  I run this same configuration in my central location, but we are running Nexus 7000's.  With the 6500's, do I need to split the port channels on the 3750 to allow them to negotiate the etherchannel? If I split the portchannels, are there any concerns? Should I expect to see the etherchannel status as P (Bundled) or H (Hot-Standby)?

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Cisco Switching/Routing :: Cross-Stack 10-Gigabit EtherChannel On 3750E / 3750-X

Jan 28, 2012

According to the following Cisco webpage, cross-stack 10-Gigabit EtherChannel is possible on the 3750 with up to two 10-Gigabit modules, using LACP: url...However, the webpage doesn't confirm if this functionality is restricted to a particular 3750 model, such as 3750E, or if it applies to all models. It also doesn't specify any particular IOS feature set. I've tried Cisco Software Advisor but it doesn't list this feature on either the 3750E or 3750-X. This is possible on the 2960-S switches (i.e. cross-stack 10gig EtherChannel)?

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Cisco Switching/Routing :: 2960S Stacks / 3750 - EtherChannel Group Numbers?

Jan 27, 2012

I have a 3750 as core switch, adding 2 stacks of 2960S to connect. I want to establish etherchannel between the 3750 and each additonal 2960S stack, do the channel group numbers between the 3750 and the new 2960s have to match? 3750 has two channel-groups(1 and 2) already configured. Need to know,  I would create 2 additional channel groups (number 3,4) for each of the etherchannels between the 3 2960S Stacks and 3750? OR channel-group # is local to the device.

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Cisco Switching/Routing :: 3560 / Getting Layer 3 EtherChannel Configuration

May 23, 2012

I been practicing with the configuration of layer 3 etherchannel configuration and i am facing a problem here. I have two 3560 switches and i want a layr 3 ether channel configuration setup between the first 2 ports of bothe the switches. I assign IPs to the Port-channel 1 of both the switches " /24 and /24" but i am unable to get a successful ping. what am i doing wrong. below are the configs for bothe of my switches.
Building configuration...
 Current configuration : 1274 bytes
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec


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Cisco Switching/Routing :: Configuring EtherChannel Between 3750-X Cross-stack And 6509E Switch?

Mar 3, 2013

configuring EtherChannel between 3750-X cross-stack and 6509E switch. I use two ports on 3750s, and two ports on 6509. I just need it as a trunk. For some elusive reason one port on 3750 keeps being err-disabled, and one on 6509 notconnected.
Here is what I did so far.
interface GigabitEthernet1/0/22
description ***VSS-RNOC-link***
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 2

Problem with :

GigabitEthernet1/0/22 is down, line protocol is down (err-disabled)
GigabitEthernet2/1/29 is down, line protocol is down (notconnect)
I tried shutting them down, then no shutting them again. Didn't work.

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Cisco Switching/Routing :: 3750x Changing Etherchannel Load Balance Configuration

Oct 24, 2012

I am installing a several new Cisco VM servers. The VM hosts are losing connectivity when we apply the etherchannel config in the core stack.  VMware has stated that the etherchannel load balance needs to be src-dst-ip in order for the etherchannel to work.However, my current stack has 2 etherchannels configured to other switches through out the bldg in network closets.  The current load balance configuration is src-mac.My question....when I make the change to src-dst-ip, will my network connectivity go down?  I saw there was an older article on this that doesnt provide an answer just a work around.  Here is the article. [URL].

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Cisco Switching/Routing :: 3560 Topology In Packet Tracer Related To Etherchannel Configuration

May 23, 2012

i have made a topology in packet tracer related to etherchannel configuration.i am using 2 3560 switches and 1 2950 switch. Now what i want is to bundle up the redundant links between these 3 switches. The links fa0/1-3 between 2950_1 and 3560_1 switches have been bundled up but when i try to bundle the links fa0/4-6 of 3560_1 to fa0/4-6 of 3560_2 it wont work. i am using channel-group 1 mode desirable between the 3560 switches. secondly if i want to assign ip to port channels then it has to be of same subnet between 2 3560 switches right and it must be same between 2950_1 and 3560_1. But these 2 subnets should be different from one another.

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Cisco Switching/Routing :: 3750 Stackable Switches Etherchannel To Core Switches

Nov 18, 2011

If I have two stackable switches one switch uplinks to one 6509 core switch and the other connection uplinks to another 6509 core switch, and also the other stackable switch does not connect to the core switches. Because I am using hsrp and also we are not using vss then one uplink to the core is not in used only ones is so then how does creating an etherchannel between does two uplinks to both core switches benefit me in anyway such as more bandwith and using both uplinks at the same time or I'm I wrong?

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Cisco WAN :: 6506 Configuration Of Policy Based Routing

Jul 18, 2011

I need to configure Policy Based Routing. There are two WAN Links from two Different ISP : Campus NW has one CORE switch - Cisco Catalyst 6506. [code]

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Cisco Switching/Routing :: Getting Configuration Of 3750?

Mar 19, 2012

i have linksys modem which already running for differents vlans  i cerated another different vlans 10 amd 20 for  10 and 20 i need internet how should i configure internet on another core switch3750

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Cisco Switching/Routing :: 3750 Inter Vlan Routing Configuration

Mar 24, 2013

In 3750 switch,I have configured intervlan routing.I have three vlans Vlan 10,vlan 20,Vlan 30 and I have assigned IP address for that Vlan.In vlan 10,I have connected one systen gigabitethernet 0/1 interface.From my system I am able to ping vlan 10 ip address but I can't able to ping other vlan ip address (vlan 20,vlan 30).Is it possible to up the protocol for all that time.

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Cisco Switching/Routing :: 3750 - VTP Transparent Configuration

Jan 28, 2012

We have a few stacked 3750 switches with vtp transparent configured...some plugged in a fiber from another network into our stacked switches...that network/switch has vtp server configured...once that switch connected to our stack of switches, it turned that stack switch into vtp server...causing the previous vlans configured to erase thus causing management issues with the stacked switches..

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Cisco Switching/Routing :: SPAN Configuration In Catalyst 3750

Dec 31, 2011

I have CISCO catalyst with VLANs (VLAN ID 33, 36, 40-53) configured. I need to configure port mirroring in Switch 3750 for NAC (Network Access Control).  I need to Monitor all the VLANs. Here is the SPAN configuration of switch: [code] Monitor session 1 source vlan 33 , 36 , 40 – 53.Monitor Session 1 destination interface fa 1/0/8  (here I am not able to set encapsulation dot1q ) because the error occurred saying %one or more dest port do not support the encapsulation%.

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Cisco Switching/Routing :: 3750 - SPAN Configuration For Websense

Jul 3, 2012

I have configured SPAN in cisco 3750 switch as below mentioned. but the destination port protocol is down.
Network Diagram:
switch(config)#monitor session 1 source interface gigabitethernet1/0/1switch(config)#monitor session 1 destination interface gigabitethernet1/0/11 ingress vlan 1


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Cisco Switching/Routing :: Catalyst 3750 Failover Configuration

Jul 16, 2012

Our servers are hosted at the Main site, site office A access to the Main site for Internet and servers. We are thinking NextG to take over when the link between sites goes down.
To start with, what is the configuration for 3750 at Site A and the Main site:

1) Trunking for both switches

2) Routing

3) the automatic failover configuration for the switch at Site A.

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Cisco Switching/Routing :: Why Is 3750 Switch Have Configuration Register Of 0xF

Apr 17, 2012

I am uploading new configurations to my Cisco 3750 stacked switch and noticed that after the load I cannot log back into the switch because my password somehow was changed. After performing password recovery and getting back into the swtch, I noticed the configuration register was 0xF. I have never seen this before. The config-register command does not seem to be supported to change it back to factory default. The switch is on a ship which has several power hits when they switch power from shore to ship power.Can this cause the configuration register to change? What is the best way to change the configuration register?

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Cisco Switching/Routing :: 2960 / 3750 - Best Configuration For This Scenario

Jul 26, 2012

I'm fairly new at trying to create isolated network segments on Cisco switches. What I'm trying to do is have multiple isolated paths that originate from my v Sphere infrastructure travel through a layer 2 link, v LAN, up to a MLS, and ultimately out to to the internet through a firewall. Each sub net might ultimately have a number of hosts on it, but I don't think the make up of those hosts will matter here.
My initial thought was creating v LAN tagged port groups on v Switches on my v Sphere infrastructure. Physical connections will go from my ESXi hosts to the 2900 series Cisco switch connected to trunk ports. Both v LANs would be configured on the switch but not assigned to physical ports. The physical connection to the 3750 would also be a trunk port connection from the 2960. The 3750 would have SVI's created that are attached to VRFs that would control route traffic. This might be totally wrong but from what i've read it seems to be going down the correct path I think.
Two part question, is this the best way to go about designing this network? If so I seem to be really struggling with the SVI/VRF part. Every time I create an SVI all of my hosts on the 10.10.10.x network can ping them, regardless of which v LAN they're on.
I just cannot seem to isolate the 172 network.

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Cisco Switching/Routing :: SPAN Port Configuration On 3750?

May 23, 2012

I'm trying to configure a mirror port on a 3750. This configuration needs to replicate data from local ports, but I need that also act as a regular access port.
With the initial configuration, SPAN port, there is no problem, all the data of the configurated ports is replicating in the configurated port. On the port configurated as mirror there is a PC connected for audio recording. When the port is not operating as SPAN there is communications without problem over the LAN. But when I configure the port as SPAN, communication is interrupted.
Here is the actual configuration:
SWITCH1-PISO7#sh monitor session 1
Session 1
Type                   : Local Session


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