Catalyst series - Private VLAN over trunk

Hey every body
I was planning to implement a Cisco Nexus 5596 in a data center as it supports private VLAN over trunk.
But now, I av been forced to use a Cisco Catalyst series instead of the Nexus one.
Based on the feature that is very important for my manager (private VLAN over trunk), which Catalyst switch can be replaced with the Nexus 5596? In other words, what Catalyst series switch works at the same scale and efficiency of Nexus 5596 and supports private VLAN over trunk feature?
Cheers

4500x Yes
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/release/note/OL_26674-01.html
Nexus 5k Yes
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/layer2/521_n1_3/b_5k_Layer2_Config_521N13/b_5k_Layer2_Config_521N13_chapter_0100.html
3850s
They dont support pvs at all yet
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/vlan/configuration_guide/b_vlan_3se_3850_cg/b_vlan_3se_3850_cg_chapter_0100.html
Restrictions for VLANs
The following are restrictions for VLANs:
The switch supports per-VLAN spanning-tree plus (PVST+) or rapid PVST+ with a maximum of 128 spanning-tree instances. One spanning-tree instance is allowed per VLAN.
The switch supports IEEE 802.1Q trunking methods for sending VLAN traffic over Ethernet ports.
Configuring an interface VLAN router's MAC address is not supported. The interface VLAN already has an MAC address assigned by default.
Private VLANs are not supported on the switch.
You cannot have a switch stack containing a mix of Catalyst 3850 and Catalyst 3650 switches.

Similar Messages

Private VLAN Promiscuous Trunk Port - Switches which support this function

Can anyone confirm if the "Private VLAN Promiscuous Trunk Port" feature is supported in any lower end switches such as Nexus 5548/5672 or 4500X? According to the feature navigator support seems to be restricted to the Catalyst 4500 range (excluding the 4500X) as shown below. If the feature is going to be supported in the Cat 3850 this would be good to know, thanks

4500x Yes
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/release/note/OL_26674-01.html
Nexus 5k Yes
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/layer2/521_n1_3/b_5k_Layer2_Config_521N13/b_5k_Layer2_Config_521N13_chapter_0100.html
3850s
They dont support pvs at all yet
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/vlan/configuration_guide/b_vlan_3se_3850_cg/b_vlan_3se_3850_cg_chapter_0100.html
Restrictions for VLANs
The following are restrictions for VLANs:
The switch supports per-VLAN spanning-tree plus (PVST+) or rapid PVST+ with a maximum of 128 spanning-tree instances. One spanning-tree instance is allowed per VLAN.
The switch supports IEEE 802.1Q trunking methods for sending VLAN traffic over Ethernet ports.
Configuring an interface VLAN router's MAC address is not supported. The interface VLAN already has an MAC address assigned by default.
Private VLANs are not supported on the switch.
You cannot have a switch stack containing a mix of Catalyst 3850 and Catalyst 3650 switches.

Private vlan over dot1q trunks with etherchannels

Dear Freinds,
I need to know whether can i use trunks in etherchannel for Private Vlans.
regards
Manish Shamjee

Hello manish,
You would need to elaborate more on that.
Are you trying to 'trunk' primary private vlan's or secondary private vlans? Or are you trying to configure private vlans on ports that are etherchannels?
Read this "Do not configure private VLAN ports as EtherChannels. While a port is part of the private VLAN configuration, any EtherChannel configuration for it is inactive"
The above is from the pvlan guidelines and restrictions found here:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/swcg/pvlans.htm#wp1090979

Private Vlans and trunk mode

if we have a primary vlan 100 associate with it
vlan 11 over {fa0/2 work as host mode} , vlan 12 over {fa0/3 work as host mode} they work as secondry community vlan
and vlan 13 as isolated secondry vlan over {fa0/4 host mode}
How we can route between private vlans 11,12,13 and {vlan 50 fa0/5 access mode}
cloud we use the fa 0/1 which connected to L3 device as promiscouous mode and trunk mode at the same time or what ... ??
and

Private vlan's are all on the same subnet, so from what you are writing I see:
100-------------------------------
| | |
| | |
11 12 13
Fa0/2 fa/03 fa0/4
and you want to route to Vlan 50, correct?
In that case you need to trunk vlan 100 to a vlan interface and make sure that vlan 50 also has a routed interface on the same device.

Catalyst 3550 Privat-VLAN

Hi,
I was about to purchase a 3560 for my home lab to do private VLANS because I read that 3550s do not supprt pvlan. Till my suprise i can see the commands to do a private-vlan configuration on my 3550:
(config-vlan)#private-vlan ?
association       Configure association between private VLANs
community         Configure the VLAN as a community private VLAN
isolated          Configure the VLAN as an isolated private VLAN
primary           Configure the VLAN as a primary private VLAN
twoway-community Configure the VLAN as a two way community private VLAN
Can any tell me why everyone says their not supported though the commands are availble?
Thanks in advance
Bart

Hi Bart,
The IOS is obviously compiled from a common code base that is shared also for Catalyst 3560 and similar platforms. That is why you see the commands actually present. However, if you try to define a Private VLAN (either primary or secondary) and exit the VLAN configuration mode, you will get a platform error message, indicating the switch hardware could not be programmed for the Private VLAN operation.
Private VLANs require hardware support, and if the underlying platform has no hardware provisions for supporting Private VLANs, they will not be available even if the switch IOS itself has the management features built in, as is in your case. True, the Private VLAN management commands should have not been enabled in the IOS for your platform but it's just the way it is...
Best regards,
Peter

Private Vlan, Etherchannel and Isolated Trunk on Nexus 5010

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. Any help would be appreciated.

Hello Emcmanamy, Bruce,
Thanks for your feedback.
Just like you, I have been facing the same problematic last months with my customer.
Regarding PVLAN on FEX, and as concluded in Bruce’s previous posts I understand :
You can configure a host interface as an isolated or community access port only.
We can configure “isolated trunk port” as well on a host interface. Maybe this specific point could be updated in the documentation.
This ability is documented here =>
http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/layer2/513_N2_1/b_Cisco_n5k_layer2_config_gd_rel_513_N2_1_chapter_0101.html#task_1170903
You cannot configure a host interface as a promiscuous port.
You cannot configure a host interface as a private VLAN trunk port.
Indeed a pvlan is not allowed on a trunk defined on a FEX host interface.
However since NxOS 5.1(3)N2(1), the feature 'PVLAN on FEX trunk' is supported. But a command has to be activated before => system private-vlan fex trunk . When entered a warning about the presence of ‘FEX isolated trunks’ is prompted.
http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/layer2/513_N2_1/b_Cisco_n5k_layer2_config_gd_rel_513_N2_1_chapter_0101.html#task_16C0869F1B0C4A68AFC3452721909705
All these conditions are not met on a N5K interface.
Best regards.
Karim

Catalyst 2960 - IBM/Cisco IGESM - Trunk port configuration

Good day all!
I am new in Cisco world and try to configure a trunk between a Catalyst 2960 switch and a IBM Blade Center IGESM switch (manifactured by Cisco).
Unfortunately, it seems that the network traffic doesn't cross the trunk link.
I have followed (at least, I think so) the instructions given on the different Cisco documentation papers but I can't find the mistake in my configuration (lack of experience :-( !).
Both switches are using IOS. 2960 uses IOS 12.2(25)FX and IGESM uses IOS 12.2(22)EA8.
The ports are connected through a cross-over cable Cat5e.
Please find below the configuration for each ports:
Catalyst 2960:
Name: Gi0/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 200 (Workstation VLAN)
Trunking Native Mode VLAN: 200 (Workstation VLAN)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: 1,99,200
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
IBM/Cisco IGESM:
Name: Gi0/20
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 200 (Workstation VLAN)
Trunking Native Mode VLAN: 200 (Workstation VLAN)
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: 1,99,200
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
For my test, I try to ping a blade (connected to IGESM) in VLAN 200 from a workstation connected to Catalyst 2960 (in VLAN 200 too). From a network anaylser (ethereal), I can see the ARP broadcast from each side but none are going across the trunk link.
I am a bit lost about this problem and would be grateful for any assistance in solving it!
Many, many thanks in advance for your time!
Best regards,
Fabian

Hi Glen!
Both switches (Catalyst 2960 & IGESM) are brand new and most ports are still reflecting manufacturer's default configuration. Vlan 2 is the default native vlan for IGESM ports (excluding ports used for switch management which use vlan 1 as most Cisco switches).
I changed the native vlan for g0/5 on IGESM to 200. Now, ports g0/5 (access mode) and g0/20 (trunk mode) are on native vlan 200. On g0/5 is installed Windows 2003 instance (firewall disabled). The only purpose is to receive and send ping request to test connectivity.
My workstation is connected to 2960 switch on port fa0/1 (please find the configuration below). I can successfully ping other vlan 200 machines connected on the same switch. For testing purpose, I try to ping the blade machine connected on port g0/5 on IGESM.
Configuration of fa0/1:
Name: Fa0/1
Switchport: Enabled
Administrative Mode: dynamic auto
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: On
Access Mode VLAN: 200 (Workstation VLAN)
Trunking Native Mode VLAN: 200 (Workstation VLAN)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
Is there any other information I could provide to better help you to understand the configuration?
Cheers!
Fabian

Private vlan with MVR or any related solution

I would like to enable MVR on C4507R+E on trunk port. Actually my current network setup is connecting two uplink from this switch to aggregation router as layer 2. And CPE is connected down this switch with private vlan configuration. I have attached interface configurations with this.
I have to apply “mvr vlan 101 receiver vlan 104” in gig 1/1 interface to map the MVR vlan. But that is not supporting when the link is configured as “switchport mode private-vlan trunk”. Only this command is allowing if I configured as “swithport mode trunk”. But if it is normal trunk, private vlan services are not working. Please suggest your solution for this problem.
According to cisco we can’t enable MVR in private vlan trunk port. Is there any other solution for this than ACL to block the stream from CPE to upwards at 4507 switch?
(mvr working, but private vlan is not working)
interface GigabitEthernet1/1
switchport private-vlan trunk allowed vlan 101-104
switchport private-vlan association trunk 200 102
switchport private-vlan association trunk 300 101
switchport mode trunk
mvr type source
mvr vlan 101 receiver vlan 104
mvr immediate
spanning-tree guard loop
end
(private vlan working, but mvr is not working)
interface GigabitEthernet1/2
description "connected to CPE"
switchport private-vlan trunk allowed vlan 101-104
switchport private-vlan association trunk 200 102
switchport private-vlan association trunk 300 101
switchport mode private-vlan trunk
mvr type receiver
mvr immediate
spanning-tree guard loop
end

Hey,
Correct, only one Isolated primary vlan is associated with Primary private vlan. Snippet from configuration guide:
"A primary VLAN can have one isolated VLAN and multiple community VLANs associated with it. An isolated or community VLAN can have only one primary VLAN associated with it."
HTH.
Regards,
RS

3750 bandwidth limitation between the same vlan over the trunk

Hi All,
I have 2 3750G series switches on the trunk link. some machines are part of vlan1 on the switch 1 and some machines are the part of the same vlan1 on the other switch2. I need to limit the bandwidth between the switches for the vlan1. picture is attached.
I tried to do through the modulare policy frame work (class-map/service-map and policy-map using the police command) but problems are
1) 3750 does not support output service policy, so i cannot apply the policy on the output of the trunk link.
2) I can apply the input policy but it will be only for one machine but not for the others on the same switch. if i apply the policy on per port basis then every port has separate bw limitation. I require to limit the bandwidth on per vlan basis on the trunk port. like vlan 1 takes 10 MB, VLAN2 takes 10 MB on the trunk link when communicating between the same vlans.
Is there any solution for that scenario? your help in this case will be higly appriciated. As its the layer 2 communication, its hard for me to find the solution. if it was layer 3 then i can do it easily by using the rate-limit commmand on the interface.
thanks

On the 4500 series we use vlan-range for this,
conf t
qos aggregate-policer 10MB 10 mbps 1250000 byte conform-action transmit exceed-action drop
policy-map 10MB
class class-default
police aggregate 10MB
interface GigabitEthernet1/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,10,12,15
switchport mode trunk
switchport nonegotiate
vlan-range 1
service-policy input 10MB
service-policy output 10MB
end
dunno if the 3750's have the same options

Multiple VLANs over 1300 series bridges

Hi
I am looking to connect a small external building to a main campus building by wireless bridge. The building i want to connect currently has two vlans, can the 1300 series bridges carry multiple vlans over the wireless bridge link? If so can anyone point me towards s document that explains it?
Many thanks
Simon

Hi Simon,
Yes they can, here is a link, i hope it helps you, look at the "Bridge configuration" title.
http://www.cisco.com/en/US/products/hw/wireless/ps4570/products_configuration_example09186a00801d0815.shtml
Regards,
Milton Tizoc.

Private-VLAN trunk on 3560X

Hi,
I need to create Private-VLANs on 3650X, but is possible to configure this technology with 3560X switch and IOS 12.2(55)SE5?. I attach the topology.
I want to configure the private VLANs on the VLAN 30, the isolated VLAN is the number 100 and the community VLAN is the 200. I guess that the interfaces trunk has to be set as promiscuous mode, is that correct?
If the trunk is configuring as promiscuous mode, what happened with the others VLANs (10, 20 and 40), and what is the correct configuration for the interfaces trunk?

Hi,
Follow the config guide on how to configure private vlans:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_53_se/configuration/guide/3750xscg/swpvlan.html
HTH

How to setup the trunk for private vlans across 2 switches (Both are SF300-24)

Dear All,
I have 2 switches which are SF300-24.
Switch 1 is connected to Internet Router for all clients on swith1 and switch 2.
The clients on switch 1 & switch 2 don’t communicate each other.
Port1~Port24 on switch 1 & switch 2 are isolated ports.
Gigaport1 on switch1 is connected to gigaport1 on switch2.
Gigaport2 on switch2 is connected to Internet Router.
The VLAN 100 is for isolated ports.
The native VLAN is 1.
Please help me how to configure the case. Thanks for your help.

I think he's just looking for PVE. You can enabled 'protected port' on a port by port basis.
Here's the excerpt from the admin guide.
Protected Port
—Select to make this a protected port. (A protected port is
also referred as a Private VLAN Edge (PVE).) The features of a protected port
are as follows:
Protected Ports provide Layer 2 isolation between interfaces (Ethernet
ports and LAGs) that share the same VLAN.
Packets received from protected ports can be forwarded only to
unprotected egress ports. Protected port filtering rules are also applied
to packets that are forwarded by software, such as snooping
applications.
Port protection is not subject to VLAN membership. Devices connected
to protected ports are not allowed to communicate with each other, even
if they are members of the same VLAN.

Private Vlan support on CAT3850

Hello , i need to configure private vlans on Catalyst 3850 .
On this page is said that 3850 does support this technology
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps12686/qa_c67-722110.html
But i can't configure it because there is no such commands in CLI
3850(config-vlan)#pri?
% Unrecognized command
Does it support it or will it support private vlans in future?

Dmitry
There does seem to be conflicting information. The link you provide does say they are supported but looking at the config guide it says -
Restrictions for VLANs
The following are restrictions for VLANs:
The switch supports per-VLAN spanning-tree plus (PVST+) or rapid PVST+ with a maximum of 128 spanning-tree instances. One spanning-tree instance is allowed per VLAN.
The switch supports IEEE 802.1Q trunking methods for sending VLAN traffic over Ethernet ports.
Configuring an interface VLAN router's MAC address is not supported. The interface VLAN already has an MAC address assigned by default.
Private VLANs are not supported on the switch.
You cannot have a switch stack containing a mix of Catalyst 3850 and Catalyst 3650 switches.
full link -
http://www.cisco.com/en/US/docs/switches/lan/catalyst3850/software/release/3se/vlan/configuration_guide/b_vlan_3se_3850_cg_chapter_0100.html
So it looks like with this release at least, they are not available. I don't know whether they are scheduled to be included in a later release of the software.
Perhaps someone from Cisco can comment. The product page certainly needs updating as it seems the configuration guide is the correct one.
Edit - i have posted a link to this thread in the Technical Documentation forum to ask for clarification although a Cisco person is still not guaranteed to answer.
Jon

Catalyst 6500 Block Switching Between Trunk Ports

Hello all,
I have a Catalyst 6509-E with SUP2T and a WS-68xx series SFP line card. On this line card I will have 5 trunk connections going to ME3400 4 port access switches. There is one tagged VLAN allowed on all trunk ports and it is the same across them all. I need to have one trunk connection be allowed to switch to all ports within this VLAN and the remaining 3 ports be denied to switch between eachother. The remaining three ports would only be able to switch to the primary trunk port.
For informational purposes I want to point out that the downstream ME3400 access switches are performing QinQ on each connection so that when the traffic reaches the 6509 it will be double tagged.
Traditionally I have been able to do this on 12 port ME3400s using the built in UNI/NNI structure and on ME3800/3600 switches using EVCs and the "split-horizon" keyword on the bridge domain. However, the 6500 doesn't seem to support either one of these commands.
Does anyone have any ideas on how to accomplish this?

I'm really not all that savvy on private VLANs but I did look at them as an option. Would they be affective on trunk ports? Most config examples I have seen have shown them applied on access ports.
Can't see switchport protected:
6509(config-if)#switchport protected
^
% Invalid input detected at '^' marker.

Private-VLAN and EtherChannel

Hi,
On a Catalyst 3750, I have created a Primary and Secondary Community VLANs and have associated them.
The Primary VLAN (100) is attached to a promiscuous port, the Secondary VLANs (101-103) aren't attached to any port.
I would like to let the Secondary VLANs traffic pass over an EtherChannel link that is a dot1q trunk.
The trunk is made with a virtual switch (VMware ESX) and transports non-Private VLANs (101-103). The trunk itself works.
How can I configure the EtherChannel as a private-VLAN port, considering that the EtherChannel isn't using PAgP/LACP modes? ("group-channel 1 mode on").
Is there a way to solve this without replacing the Private-VLANs with VLANs?
Thanks in advance for your help!

From "EtherChannel Configuration Guidelines"
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/12225sed/scg/swethchl.htm#wp1021856
Do not configure a private-VLAN port as part of an EtherChannel.

Catalyst series - Private VLAN over trunk

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