Cisco Switching/Routing :: 6500 - Adding VLan To Trunk In Port Channel

Jan 20, 2012

I need adding a vlan to the trunks bundled in port channel. I know how to add v lans to a port channel with Cisco IOS but with CAT OS.

I have 2 ports bundled to form ether channel in switch which is running CAT OS. There are already few v lans allowed in the trunk of each interface. now I need to add one more v lan.

For Example:- 
v lan 135 needs to be added in addition to the existing v lans.
 
clear trunk1/2 1-112,115,117-134,136-4094
set trunk 1/2 on dot1q 113-114,116,135
 
and similarly on the 2nd interface
  
so if I add vlan135 to the trunk one after another will it cause any service disruption?

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Cisco Switching/Routing :: 6500 / Each Port Is Trunk And Carry Same VLAN

Dec 6, 2012

can i have 4 links from an ESX server to 6500 , each link represents a trunk link carries each the same 2 VLAN , 100 and 101 , keep port-channel out of the picture , does it work well?

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Cisco :: Adding VLAN To Trunk Ether-channel Ports On 2960?

Dec 25, 2012

I have trunk etherchannel ports 47,48 which both have Vlans allowed on trunk 70,71. Everything works pretty fine. Now I am trying to add a new VLAN 72 to these ports.

conf t
interface FastEthernet0/47
switchport trunk allowed vlan add 72
exit
exit

So far so good. But when making the same command for port FastEthernet0/48 my switch stuck.

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Cisco Switching/Routing :: 6509 Trunk To Port Channel

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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Cisco Switching/Routing :: Adding Vlan To Trunk Drops HP Switches 3750 Behind

Nov 13, 2012

I have a 3750 as a core and have a series of HP Procurve switches that are daisy chained using one port.  I have two vlans on the port now (6 &9) and everything works fine, all switches communicate and end devices on the switches are also talking.  There is a requirement to add a device towards the end of the chain which requires it to connect using Vlan1.  Once I add Vlan1 to the port onthe 3750 I lose connectivity to all the HP switches.

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Cisco Switching/Routing :: Implement Shaping VLAN Only On Trunk Link Between 6500 / 3560

Jan 2, 2012

I need to implement the shaping VLAN only on the trunk link between the 6500 and 3560. [code]

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Cisco Switching/Routing :: Nexus 5k Adding And Removing Vlans In Port-channel (vpc)

Dec 4, 2012

I am a bit confused by the output of 'show run' and 'show run switch-profile' that pertains to a port-channel interface configured in a switch-profile. My main gaol is to find out how can I add/remove the allowed vlans the port-channel (configured as trunk) carries. The setup is like this. I have 2 N5k in vPC domain and Etherner1/11 on both switches is configured as trunk vPC that connects to a core switch. When I issue ‘show run’ for the port-channel and physical interface I get the following output. [code] From above it seems the switch-profile configuration is missing the 'switchport trunk allowed vlan' in the port-channel interface. If want I to remove vlan 30 from the allowed vlan, should I go under the switch-profile mode and remove vlan 30 from the allowed list even though the switch-profile configuration seems to be missing this.

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Cisco Switching/Routing :: 3750X - Adding Ports To Existing Port-channel

Jan 29, 2013

I need to tear down an existing port-channel on a 3750X running c3750e-universalk9-mz.150-1.SE3.bin. This port channel is currently down down. It has three ports in it that will be added one each to three existing port-channels, I am assuming as long as the "channel-group" command is exactly the same as it is on the three existing port-channels I should be ok just adding the new port. One point to note is that the three existing port-channels all have three ports so this will be adding the fourth port to each port-channel. I know after reading that it is a best practice for load balancing to use either 2, 4, or 8 ports for a port-channel. Also what is the command to see all ports that are in a port channel?

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Cisco Switching/Routing :: 6500 Setup In VSS Configuration - Port Channel ID

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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Cisco Switching/Routing :: 6500 Redundant Supervisor Port Channel?

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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Cisco Switching/Routing :: 6500 STP Config On Port-channel Best Practice

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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Cisco Switching/Routing :: Catalyst 6500 / Port-Channel Down But Correctly Configured

May 23, 2012

I has a issue about etherchannel beetwen 02 Catalyst 6500 switch, i need your comment about it. if you had any similar experience:
 
1.- On Catalyst Switch 6500-1:   I configured interface port-channel 4 and associated it to G6/29 and G6/30 interface Port-channel4description IUU1_Gn1_HLIMSGSN01_Port_channel_6_29_6_30switchportswitchport trunk encapsulation dot1qswitchport trunk allowed vlan 406,408switchport mode trunkswitchport nonegotiatelogging event link-statusload-interval 30mls qos vlan-basedmls qos trust dscp!

2.- On Catalyst Switch 6500-2:  I configured interface port-channel 4 and associated it to G6/29 and G6/30
 
interface Port-channel4
description IUU2_Gn2_HLIMSGSN01_Port_channel_6_29_6_30
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 407,409

[code]....
 
and i see output "show interface Po4A" up up on switch-1, "show interface Po4B" up up on switch-2   
 
5.- In the show running-config not appear configured Po4A and Po4B. it only show on outputs
 
6.- Po4A and Po4 was not configured on neither switches, my question is why appear Po4A and Po4B on switch-1 and switch-2 respectively?  and why Po4 appear in down down.
 
7.- I solved this issue by shutdown and not shutdown to the interfaces on both routers, currently all is OK.

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Cisco Switching/Routing :: Layer 3 Port Channel From 6500 VSS Switch To Two Standalone

Jul 30, 2012

Configured Layer 3 portchannel from 6500VSS enabled switch to two different 6500 standalone switch. Configured first ip on VSS switch, second ip on standalone switch1 and third IP on standalone switch2. My question is
 
1. Will the portchannel be up?
2. If port channel is up, will I able to ping the connected IP's.

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Cisco Switching/Routing :: 6509 - Can't Change Native Vlan On Trunk Port?

Jun 6, 2012

I have several closets with Cisco 3560 on the edge that I'd like to change the vlan that's used for the management vlan on each. In the core I have a Cisco 6509 with Sup720's.
 
I'd like to do this by changing the native vlan on the trunk port on the core 6509 interface that connects to the 3560. and leave the management vlan on the 3560 as vlan 1.
 
Seems trivial but what I tried didn't work and I didn't have the window to troubleshoot. I'll paste the simplified configs for  the interfaces  below
  
!
6509 configs:
!
interface Vlan50ip address 172.16.50.2 255.255.255.0!interface FastEthernet

[Code]....

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Cisco Switching/Routing :: 6500 - Adding Port Channels In Existing STP Topology

Apr 3, 2013

current topology is build from 4 6500 switches connected in a ring topology. Using Port channel (2x 10Gbit) links to connect left side top and bottom 6500's (DC1), 10 G bit link to connect right side 6500's (DC2) In between a 1 G bit link is used to connect top 6500's (DC1-DC2) and the same for bottom 6500's (DC1-DC2). 

Path costs are 5 and 6 so the T5/4 from bottom right is blocking. Bandwidth demands are increasing, so thinking about adding extra 1 G bit links to the existing ones and create ether channels. Path costs here are 4 and 5, so T5/4 from bottom right is still blocking, but when the bottom 2 G bit port-channel is loosing one 1 G bit link the path costs of both directions become equal. So I am worried that STP will not re converge and leave me with a congested 1 G bit link. I cannot test this setup in a lab, are there any options for STP to re-converge here?

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Cisco Switching/Routing :: 3560 - What Happens When Voice Vlan Command Is Added To Trunk Port

Oct 11, 2010

Any way to test in a lab what would happen if a tech mistakingly added "switchport voice vlan XX" to a trunk port? I am try to do some RCA on an issue and this has been identified as a possible cause by one of my techs.
 
The config is Switch1------Switch2--------Switch3 Each interswitch connection is configured as a dot1q trunk with all vlans allowed. The link between switch2 and 3 is where switchport voice vlan 10 was added. Switch1 is a 3750 and 2/3 are 3560's.

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Cisco Switching/Routing :: Nexus 5000 To Change VLan Port Channel

Jan 29, 2013

I'm trying to change a vlan on a port-channel but I am getting this error when I apply the change:" error: command is not mutually exclusive",I have done this in the past but I cannot remember exactly what I should type to apply the change.

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Cisco :: Inter VLAN Routing With Port Channel

Oct 30, 2012

I want to do the inter vlan routing packet tracer file url...configuration of MLS are as bellow can anyone tell me why vlan on switch0 can not ping vlan on switch1. [code]

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Cisco Switching/Routing :: Catalyst 6500 BUS EoBC Channel

May 5, 2013

"How to display the EOBC error counters in the Catalyst 6500 series switches and a definition of the EOBC interface" document here on support forum stays that The Ethernet Out of Band Channel (EOBC) is a  half duplex channel that services many functions, which include the  Simple Network Management Protocol (SNMP) and the packets that are  destined for the switch.
 
Previously i were thinking that EoBC used only for SCP  and SLP protocol. In addition i found other article (but not on cisco site, heh) where stays that The Results bus is a       control plane, while the C (EoBC) bus is more of an       "admin plane", thus you will never see data       packets (such as CDP, SNMP, etc.) going over the R or C bus.
 
So there is a big contradiction between those two statements. How to prove one of those and if first one right, what meaned under the packets that are  destined for the switch in it? SCP and SLP or other traffic as well?

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Cisco Switching/Routing :: Lose Lot Of Bandwidth Over Trunk Port (vs Access Port) 3750g

Feb 18, 2013

I have a 3750g connected to a "core" switch stack of 7 other 3750g's via 2 GigE ports in a trunk.  This is currently in a switchport mode access port- channel so only the default vlan data is sent over. Now we have a need due to physical location of these switches, to allow vlan20 (DMZ) from this 3750g to the switch stack.  I will configure a few ports on the switch stack for vlan20 and they need to be able to talk to the stand alone 3750g.To do this I will change the port channel on both endpoints to

-switchport trunk ecapsulation dot1q

-switchport mode dynamic desirable
 
also making the appropriate change on the interfaces belonging to this trunk.My question is, now that its a trunk port that carries multiple VLANs, how much is the bandwidth reduced on that 2gbps link?I have a very active VLAN (10) on the stand alone switch, but on the core I'm not going to be assigning VLAN 10 to any ports.  So does traffic from VLAN10 even come across the trunk (wasting bandwidth) if no ports on the core side are assigned to it?  I really just need vlan 1 and 20 (for now).

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Cisco Switching/Routing :: 2960 / Traffic In Same VLAN Goes Up Trunk?

Feb 11, 2013

I have 2 hosts, 1 plugged in fa 0/21 in VLAN 101 and another in fa 0/22 in VLAN 101 on our L2 Cisco 2960.  If I try and transfer files from either host the gig 0/1 trunk port on the 2960 leading tot he 3750 fa 0/1 port hits 100mb (using a real time bandwidth monitor tool), but why?  This VLAN is on the same switch, why does it go one way up the trunk to the L3 3750 switch?  The L3 3750 is the VTP server and the 2960 is a client.  I would of thought the traffic stays local.  The 2 hosts don't even have a gateway set.To sum up the typology the 2960 and 3750 are trunked using a single cable.  The 3750 hangs of a ASA firewall using SVIs.Here is whatthe traffic looks like when copying a file between hosts (2gb file).
 
3750 L3 Switch (VTP Server)
  interface FastEthernet1/0/4
description Trunk to Cisco 2960 Gig 0/1
switchport trunk encapsulation dot1q
switchport mode trunk
switchport nonegotiate

[code]....

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Cisco Switching/Routing :: 2960S - IPTV VLAN In Trunk QOS

Sep 22, 2012

I need to set QOS in our new network. We have connected 2 cities together with 700Mbit leased line. On each side we have Catalyst 2960S switches and between them is TRUNK for VLAN 10 and Vlan 20.Vlan 10 is for IPTV (fixed 400 Mb/s for CATV)Vlan 20 is for Internet (rest).Sometimes is happening that Vlan 20 takes more than 400 Mb/s for a few seconds and in this situation we have problems with CATV.Is there any way to make a guaranteed bandwidth 410 Mb/s for CAT - VLAN 10  on this swithces?

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Cisco Switching/Routing :: 2911 Out Of Box - No IP SLA Support And No VLan / Trunk

Jan 27, 2013

We bough an Cisco 2911 router, and as i see the "ip sla monitor" command is not supported. Which license/IOS upgrade should i buy the fullfill this. And i cant add a trunkport to the iunterface even cant add a vlan to interface. How do i a trunkport on the cisco 2911 router. ANd how can i do a vlan on a interface on the router.

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Cisco Switching/Routing :: 2960 / Verifying Trunk Vlan Tagging?

Jul 5, 2012

I have a 2960 switch connected to another. The I need to verify that vlan0010 on one switch is forwarding tagged traffic between the other switch it is hooked up to through the Gi0/1 port. How do I verify this? I have a server that's multihomed (Broadcom) on the other side an it is supposed to be on this vlan with one of it's network interfaces. We had a pwer outage and now it cannot communicate on this vlan. However, everything else on the vlan can reach all the other nodes accept this server in the front of my building. All the devices in the same room are linked to the same switch which has one port (fa0/17) on vlan0010 and can ping eachother just fine. The server is hooked to port 24 on my server room switch and Gigabit port one goes to a fiber converter all the way to the back. It then gets converted from fiber to cat5e again and links into the switch (2960) in the backroom.

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Cisco Switching/Routing :: QoS Limit Specific VLAN Within Trunk 4506

Jan 25, 2012

Need to limit the amount of bandwidth a specific VLAN can use on a 802.1q trunk port. Situation is that we have a pair of Catalyst 4506 switches which have 802.1q trunk ports into a Checkpoint Firewall, this in turn is connected to a managed WAN router (to which I can't apply a QoS policy).If the 4506 was routing the traffic it would be easy to setup a class-map to match the IP traffic and then QoS the traffic, but the VLAN in question is trunked directly into the firewall (no L3/IP presence on the 4506 next hop for all clients on this VLAN is the firewall).What I need to do is restrict any traffic from this specific VLAN to 10Mbps on the uplink to the Checkpoint Firewall so it cannot impact the onward WAN.

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Cisco Switching/Routing :: 4096 - Limit Number Of Vlan Trunk

Nov 15, 2011

a number of vlan on trunk is 4096, can I limit this number? I need trunk pass only 10 vlans.

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Cisco Switching/Routing :: 6513 To 3750 Vlan Trunk Connectivity

Nov 8, 2011

Currently we have a 6513 core (running IOS and doing limited routing) with VLAN Trunking to about a dozen 3560 edge switches, with various VLANs going to each of the edge switches.  All works well.  We are downsizing and replacing the 6513 core with a 3750G stack.  We have the stack up and running in the lab, and want to slowly (as we move floors) migrate all of the edge switching to the 3750 stack. 
 
The plan is to connect the 3750 stack to the 6513, then slowly migrate the edge switches to the stack (from the 6513).  I would like to put in place 4 x 1GB trunk links between the 6513 and the 3750 stack before I start moving edge switches to ensure adequate bandwidth.  Once all of the edge switches are on the new 3750 stack, I will start to decommission the 6513.
 
What is the best way to configure the links between the cores (old 6513 and new 3750 stack)?  I can easily get the edge switches configured to the 3750, but am worried about the core links.  I really want to avoid having to perform an all-at-once cutover of the cores.  Another question is when do I try and migrate the VTP server role from the 6513 to the 3750 stack?  I could simply make everything transparent, and ditch server-based VTP, as we rarely change or creat VLANs.

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Cisco Switching/Routing :: Create Two Trunk Links Between 4506 And 4948 And Allow Vlan 540?

Sep 24, 2012

Current Situation:We are able to reach server IP -10.203.206.40  from our 4948 switch vlan 10.30.1.0/24 through the Layer 3 interface between 4506 and 4948.  
  
Requirements
==========
 
1) Now we would like to add one more L3 interface between 4506 & 4948 for redundancy purpose.
  
2) Make available Vlan 540 in 4948  from 4506... need to create two trunk links between 4506 & 4948 and allow vlan 540.

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Cisco Switching/Routing :: Create New Vlan On 3750 Switch With Trunk Mode

Jan 16, 2013

This is regarding VLAN creation on C3750E switch.I want to create new Vlan 94 on this switch and also I want to allowed same interfaces like Vlan 95 & Vlan 96. [code]

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Cisco Switching/Routing :: Private Vlan / Etherchannel And Isolated Trunk On Nexus 5010

Feb 9, 2011

I'm not sure if I'm missing something basic here however i though that I'd ask the question. I recieved a request from a client who is trying to seperate traffic out of a IBM P780 - one set of VIO servers/clients (Prod) is tagged with vlan x going out LAG 1 and another set of VIO server/clients (Test) is tagged with vlan y and z going out LAG 2. The problem is that the management subnet for these devices is on one subnet.
 
The infrastructure is the host device is trunked via LACP etherchannel to Nexus 2148TP(5010) which than connects to the distribution layer being a Catalyst 6504 VSS. I have tried many things today, however I feel that the correct solution to get this working is to use an Isolated trunk (as the host device does not have private vlan functionality) even though there is no requirement for hosts to be segregated. I have configured:
 
1. Private vlan mapping on the SVI;
2. Primary vlan and association, and isolated vlan on Distribution (6504 VSS) and Access Layer (5010/2148)
3. All Vlans are trunked between switches
4. Private vlan isolated trunk and host mappings on the port-channel interface to the host (P780).
 
I haven't had any luck. What I am seeing is as soon as I configure the Primary vlan on the Nexus 5010 (v5.2) (vlan y | private-vlan primary), this vlan (y) does not forward on any trunk on the Nexus 5010 switch, even without any other private vlan configuration. I believe this may be the cause to most of the issues I am having. Has any one else experienced this behaviour. Also, I haven't had a lot of experience with Private Vlans so I might be missing some fundamentals with this configuration.

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Cisco Switching/Routing :: 2950 - Private VLAN Across Trunk To Older Model Switches

Mar 7, 2012

I am looking into the possibility of using private vlan's for some dmz implementations however I do have what may be some very rudimentary questions. It seems straightforward how to configure the primary/secondary vlan configuration as well as associating them. However in my case I would be looking to configure the PVLAN on a 6500-vss platform acting as the router while all of the hosts which I would desire to have in the isolated vlan would be spread out across a number of older Cisco switches which only support "protected port" setup or Procurve switches all of which I do not have budget to replace with something newer. So in my scenario I would have a 6500 connected by trunk to multiple switches which only support a protected port setup such as a Procurve (top of rack) or a Cisco 2950. As the Procurve or 2950 would not support Private VLAN setup, do I then just configure the secondary vlan to be allowed across the trunk from the 6500, configure that vlan on the Procurve or 2950 (as vtp will not foward the info for the secondary vlan) and assign that vlan to the host port as well as setting it as a protected port and this will communicate just fine across the trunk to the router as well as stopping the protected port in top of rack switch 1 from being able to communicate to a protected port in top of rack 2,3,etc? If the above scenario is what needs to be done, do I just use a regular trunk or do I have to use a PVLAN trunk?

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Cisco WAN :: 6500 Port Turns Amber After Unbind Channel

Sep 12, 2012

We have one cisco core switch 6500 series which was configured portchannel on several gig interfaces. This port is used as a trunk to enable communication between VLANs. The VLANs is where several high-end servers/hosts reside.After we disable / unbind the portchannel, the port turns amber. The following is what we did on the interface
 
1-no switchport command
 
2- make the port as access mode #switchport mode access
 
3- shut and no shut
 
4- clear arp
 
5- clear mac
 
what else can we do on that particular interface. It is just on that particular interface, the rest are ok.

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Cisco :: Obtaining Vlan On Trunk / Port

Jun 29, 2012

I'm trying to obtain the vlans on a trunk and also whether the port is a trunk. Ive seen VTP mib, but these dont appear present on my switch (2950).

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