4500-x vss MEC to 2960-x stack
Building A
(2) 4500-x VSS
(9) closets with 2960-x stacks
(2) Data Center N5K-C5596t
I'm having a difficult time trying to find documentation.
I have the (2) 4500-x configured with VSS and am trying to find info on connecting the 2960-x stacks.
Hi,
some info.
PAgP is supported in all platforms except the Cisco Catalyst 37xx stack configuration in which cross-stack EtherChannel (LACP) is required to have MEC-connectivity with the VSS. Because cross-stack EtherChannel does not support PAgP, it cannot use enhanced PAgP for dual-active detection. A common approach to resolve this gap in support is to use two EtherChannel links from the same stack member. This solution is a non-optimal design choice because it creates a single point-of-failure. If a stack member containing that EtherChannel fails, the whole connectivity from the stack fails. To resolve this single point-of-failure problem, you can put two dual-link EtherChannel group, each on separate stack member connected to VSS; however, it will create a looped topology. The loop-free topology requires a single EtherChannel bundle to be diversified over multiple members which in turn requires LACP.
Similar Messages
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Hi all,
I was reading today that Cisco Release IOS XE 3.4.0SG does not support Layer 3 MEC on the 4500 platform.
I would like to configure my MEC and run OSPF on my UPLINK. I would also like to prioritise 1 uplink over the other.
Would something like this work or can someone recommend a better solution not too sure abut the ospf cost.
thank you
SWITCH-VSS(config)#interface Port-channel 10
SWITCH-VSS(config-if)#switchport
SWITCH-VSS(config-if)#switchport mode trunk
SWITCH-VSS(config-if)#switchport nonegotiate
SWITCH-VSS(config-if)#switchport trunk allowed vlan 100
SWITCH-VSS(config)#interface range gigabitEthernet 1/2/48, gigabitEthernet 2/2/48
SWITCH-VSS(config-if-range)#switchport
SWITCH-VSS(config-if-range)#switchport mode trunk
SWITCH-VSS(config-if-range)#switchport nonegotiate
SWITCH-VSS(config-if-range)#switchport trunk allowed vlan 100
SWITCH-VSS(config-if-range)#channel-group 10 mode desirable
SWITCH-VSS(config)#interface port-channel 15
SWITCH-VSS(config-if)#switchport
SWITCH-VSS(config-if)#switchport mode trunk
SWITCH-VSS(config-if)#switchport nonegotiate
SWITCH-VSS(config-if)#switchport trunk allowed vlan 105
SWITCH-VSS(config-if)#interface range gigabitEthernet 1/3/48, gigabitEthernet 2/3/48
SWITCH-VSS(config-if-range)#switchport mode trunk
SWITCH-VSS(config-if-range)#switchport nonegotiate
SWITCH-VSS(config-if-range)#switchport trunk allowed vlan 105
SWITCH-VSS(config-if-range)#channel-group 15 mode desirable
SWITCH-VSS(config)#interface vlan 100
SWITCH-VSS(config-if)#ip address 10.0.0.1 255.255.255.252
SWITCH-VSS(config-if)#int vlan 105
SWITCH-VSS(config-if)#ip address 10.0.0.5 255.255.255.252
SWITCH-VSS#conf t
Enter configuration commands, one per line. End with CNTL/Z.
SWITCH-VSS(config)#router ospf 100
SWITCH-VSS(config-router)#router-id 10.10.10.10
SWITCH-VSS(config-router)#log-adjacency-changes
SWITCH-VSS(config-router)#nsf
SWITCH-VSS(config-router)auto-cost reference-bandwidth 1000
SWITCH-VSS(config-router)#network 10.0.0.0 0.0.0.3 area 0
SWITCH-VSS(config-router)#network 10.0.0.4 0.0.0.3 area 0
SWITCH-VSS(config-router)#passive-interface default
SWITCH-VSS(config-router)#no passive-interface port-channel 10
SWITCH-VSS(config-router)#no passive-interface port-channel 15
SWITCH-VSS(config-router)#no passive-interface vlan 100
SWITCH-VSS(config-router)#no passive-interface vlan 105
SWITCH-VSS(config-router)#^Z
SWITCH-VSS(config)#int vlan 100
SWITCH-VSS(config-if)#ip ospf cost 10
SWITCH-VSS(config-if)#int vlan 105
SWITCH-VSS(config-if)#ip ospf cost 100
SWITCH-VSS(config-if)#So you are having two etherchannels to the same device ?
I'm just not sure why you are using two etherchannels as one should give you the redundancy ie. if one of the 4500s goes down you still have the connection from the 3550 to the other 4500.
Again though, like i say it could be due to may lack of knowledge in terms of VSS.
Hopefully Reza can add to this.
Jon -
4500-X VSS and Dual-Active detection PAgP, using 2960-X access stacks
Hi.
I think this may have been asked before but its not clear to me.
I have 2 4500-X configured as a VSS pair, so a VSL link of 2 x 10Gig between them.
I have a number of Access stacks, built from 2600-X's
I have tried to configure dual active detection, which from what I read it is to use ePAgP or Dual-Active Fast hello Packets.
I do not have any additional SFP's to connect the 4500's together using Fast Hello, so ePAgP appears my only option
When I try and configure the access stack with an Etherchannel across 2 switches using PAgP I get the error -
command rejected by the 2960-x stack
%With PAgP enabled, all ports in the Channel should belong to the same switch
Command rejected (Port-channel11, Te1/0/1): Invalid etherchnl mode
From what I have read, PAgP cannot be configured across a stack, and people are recommending LACP as the method to configure the Etherchannnel, but How does that work with Dual-Active detection PAgP?
When I configuring Dual-Active detection PAgP, and made a couple of the MEC's trusted and configure using LACP active, then tried failing the VSL between the 4500's, each stack went into err disable on the trunk connections.
Question is! Does dual active detection PAgP work over an Etherchannel configured as LACP? or what's my options
Thanks for any help.Hi,
Question is! Does dual active detection PAgP work over an Etherchannel configured as LACP? or what's my options
No, you can't use LACP for ePAGP detection. One option is to break one of the stacks in your access layer and use the switch you want to use for dual active detection individually (not part of a stack) and uplink it to both 4500X switches. This way, you know that the single switch is used for ePAgP detection.
HTH -
Channel-group mode for VSS MEC link to WLC
Hello
I have a Cisco 5508 WLC with LAG enabled - this LAG connects to a single VSS chassis (VSS etherchannel mode is "on" as per the WLC documentation)
I'm looking to spread this LAG across both the VSS chassis - Cisco's VSS best practice document below states that for Multi Chassis Etherchannel "Do not use on and off options with PAgP or LACP or Trunk protocol negotiation"
http://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-virtual-switching-system-1440/109547-vss-best-practices.html
Is anyone else connecting a WLC LAG to a VSS MEC and if so what channel-group mode are they using?
Thanks
AndyHi,
I have never connected a WLC to VSS, but WLC should be threaded just as an access switch and use LACP or PAgP to connect to both VSS switches.
HTH -
Catalyst 2960-S Stack Interface Packet Drop
Hi all!
I have a 2960-S stack with the following behavior:
SWITCH#sh int g1/0/26
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 12275
When I issue the show mls qos interface g1/0/26 statistics:
SWITCH#show mls qos interface g1/0/26 statistics
GigabitEthernet1/0/26 (All statistics are in packets)
dscp: incoming
0 - 4 : 35356866 0 0 0 0
5 - 9 : 0 0 0 2 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 634354 0 0 0 0
45 - 49 : 0 49446819 0 0 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
dscp: outgoing
0 - 4 : 6835883 0 0 0 0
5 - 9 : 0 0 0 43973612 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 1 0 0 0
20 - 24 : 0 0 0 0 204586
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 2 0 0 0 0
45 - 49 : 0 2215325 0 55 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 29668 0 0 0
60 - 64 : 0 0 0 0
cos: incoming
0 - 4 : 35374153 2 0 0 0
5 - 7 : 50121685 0 0
cos: outgoing
0 - 4 : 12975602 43973617 85081 204622 122
5 - 7 : 47659950 105 34377016
output queues enqueued:
queue: threshold1 threshold2 threshold3
queue 0: 0 0 47659935
queue 1: 92482 1222278 34432039
queue 2: 0 0 13178400
queue 3: 0 0 43982889
output queues dropped:
queue: threshold1 threshold2 threshold3
queue 0: 0 0 71
queue 1: 0 1738 0
queue 2: 0 0 20
queue 3: 0 0 375553
Policer: Inprofile: 0 OutofProfile: 0
I need some help to read this output but it seems that packets are dropped at all queues, isn't it?
Any help please?
Thanks in advance!Please post the output to the following commands:
1. sh interface G1/0/26; and
2. sh controll e G1/0/26
What kind of client is connected to port Gi1/0/26? -
i purchased a new 2960-X switch
i would like to add it to an existing 2 switch 2960-s stack
i understand i need to downgrade the stack speed on the 2960-x with :
switch stack port-speed 10
do the IOS version need to be identical on all switches?
i have:
2960-s = 12.2(55)SE3
2960-x = 15.0(2)EX3
if they do need to be identical, whats the best way to do this?
thanksYes, use this command with a .tar file to upgrade all switches in the stack.
Here is an example of using the `archive download-sw` command to upgrade a stack of Cisco Catalyst 2960-S switches. Notice that the number of members in the stack is not relevant to this command. By default all members are upgraded unless the network admin uses the options to do otherwise. The TFTP IP address is 192.168.1.1, and the tar file name is c2960s-universalk9-tar.122.53.SE.tar
Switch# archive download-sw tftp://192.168.1.1/c2960s-universalk9-tar.122.53.SE.tar
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/white_paper_c11-578928.html
HTH -
Hi,
We are required to upgrade a 4500-x VSS cluster from IPBASE to ENT SERVICES.
Should we buy two licenses packs? Or a single one? Since VSS forms one logical entity.
Thank you.Hi,
Even though they are logically one switch but you need one license per chassis. If you put 2 sups in one chassis than you only need one license.
HTH -
What are the steps to upgrade the IOS on a 2960-X stack using LMS 4.2? Can I use the .bin file or do I need the.tar file? Also, will this upgrade all the stack members or just the stack master?
By my count, you have ~100 devices in that building. I would expect many of the IP phones will have a PC attached. Why is your port count so high? 192 ports or 240 ports per the quotes seems like too many.
Also, you might want to check the 3650 switches. They are basically replacements for the 3750x with newer technology and the same price point.
It doesn't look like 3750 + 2960 makes sense. Why add another bottleneck and layer of troubleshooting if not necessary? Why not just stack the number of switches you need instead of adding a semi-distribution layer? Stacking provides much more throughput than copper uplinks. If you need more throughput to the cores, use 4 X 10G uplink interfaces. -
HP Virtual Connect to 4500-X VSS
Is it possible to create a shared uplink set between 2 HP VC FlexFabric 10Gb/24-Port Module connecting to 2 Cisco 4500-Xs in VSS (total of 4 links)? Traditionally I've been created 1 SUS for each VC going into Cisco Nexus 5Ks. Each SUS is active/active and then within VMware each vSwitch has both SUS links. This works well, but I'd like to know if there's a better way to be doing things.
Hi,
some info.
PAgP is supported in all platforms except the Cisco Catalyst 37xx stack configuration in which cross-stack EtherChannel (LACP) is required to have MEC-connectivity with the VSS. Because cross-stack EtherChannel does not support PAgP, it cannot use enhanced PAgP for dual-active detection. A common approach to resolve this gap in support is to use two EtherChannel links from the same stack member. This solution is a non-optimal design choice because it creates a single point-of-failure. If a stack member containing that EtherChannel fails, the whole connectivity from the stack fails. To resolve this single point-of-failure problem, you can put two dual-link EtherChannel group, each on separate stack member connected to VSS; however, it will create a looped topology. The loop-free topology requires a single EtherChannel bundle to be diversified over multiple members which in turn requires LACP. -
i am running 4500-x in vss mode. I have set of stackable upstream switches (2960s) that does not support epagp. I cant use fast hello because my ios on 4500x does not support it and dont want to upgrade it. i dont want to use pagp and terminate all links on 1 access switch.
i was wondering if this will work ?
on 4500x i have configured
switch virtual domain 10
switch mode virtual
switch 1 priority 110
mac-address use-virtual
dual-active detection pagp trust channel-group 100
interface Port-channel100
description Test
switchport
switchport mode trunk
interface TenGigabitEthernet1/1/1
switchport mode trunk
channel-protocol lacp
channel-group 100 mode active
interface TenGigabitEthernet2/1/1
switchport mode trunk
channel-protocol lacp
channel-group 100 mode active
Upstream access switches (2960s)
int port-channel 1
switchport mode trunk
spanning-tree guard loop
interface GigabitEthernet1/0/1
switchport mode trunk
spanning-tree guard loop
channel-protocol lacp
channel-group 1 mode active
end
interface GigabitEthernet1/0/2
switchport mode trunk
spanning-tree guard loop
channel-protocol lacp
channel-group 1 mode active
endyes thats correct but i am not sure if the failover is working correctly. hence i have attached teh config above. do you think this is going to work ?
running
dual-active trust detection pagp port-channel xx
and using lacp on port-channel that connect to 2960s switches ?
I read somewhere trust pagp and using lacp wont work ? please let me know what you thoughts are ? -
Hi
I am stacking 6 Catalyst 2960 SF Series PoE 48 ports, I am using the Bladestack cable. I plug it in from 1 to 2 on all the switches. If I look at the lights it shows 4 in on group and 2 in another. If I do a show switch detail it shows the following
Switch/Stack Mac Address : 44ad.d982.a100
H/W Current
Switch# Role Mac Address Priority Version State
1 Member 5006.0425.7e00 1 1 Ready
*2 Master 44ad.d982.a100 1 1 Ready
3 Member 5006.0435.bc00 1 1 Waiting
4 Member 5006.04d8.7000 1 1 Ready
Stack Port Status Neighbors
Switch# Port 1 Port 2 Port 1 Port 2
1 Down Ok None 2
2 Ok Ok 4 1
4 Down Ok None 2Hi , i think only four 2960 SF switches can be stacked into a singe logical switch.
Please refer the link , hope this helps:
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/white_paper_c11-578928.html -
VSS MEC to different vendor devices
Hello:
I am configuring a VSS using two 4507R with dual supervisor, and I'd like to know whether MEC supports a different vendor's device in the other end.
To be specific, I need to connect this VSS to a non-Cisco firewall. If this firewall supports LACP, I want to use a L3 portchannel between my VSS and this firewall, but I' like to know whether this would work.
Thanks in advance, Faimy.Did you ever figure this out? I am in the same situation and cannot figure out how to refer to specific ports on the same motherboard.
https://wiki.archlinux.org/index.php/Pu … ont.2Frear looks promising. However I forget whether one of my cords is plugged in to the rear jack or the center jack, and moving my desktop to look is a little involved. Oh well, next time the need arises I will experiment further.
Last edited by rosshadden (2014-03-06 03:22:47) -
Cisco 4500X VSS & MEC Cisco 2960X
Hi
I have Cisco 4500x VSS connect to MEC Cisco 2960X using LACP.
I encountered a problem about C2960X
Integration reason
1.C2960X Ten 1/0/2 link flapping interface error-disable . I am disable interface then enable interface , switch show SFP not Present .
Te1/0/2 notconnect 1 full 10G Not Present. (SPF plug-in Correct)
2.use CLI reload C2960X , Ten 1/0/1 ,Ten 1/0/2 notconnect SPF Not Present. (SPF plug-in Correct)
error message :
Dec 18 12:40:25.250: %SYS-5-CONFIG_I: Configured from console by console
Dec 18 12:41:48.888: % ILET-1-AUTHENTICATION_FAIL: This Switch may not have been manufactured by Cisco or with Cisco's authorization. This product may contain software that was copied in violation of Cisco's license terms. If your use of this product is the cause of a support issue, Cisco may deny operation of the product, support under your warranty or under a Cisco technical support program such as Smartnet. Please contact Cisco's Technical Assistance Center for more information.
26F_guest_switch#show license
Index 1 Feature: lanlite
Period left: 0 minute 0 second
Index 2 Feature: lanbase
Period left: Life time
License Type: Permanent
License State: Active, In Use
License Priority: Medium
License Count: Non-Counted
3.C2960X power Cycle ,C2960X operation normal, ,but recurring problems every day.
I do not know where the problem , I have upgrade C2960X IOS but it had same problem.
Cisco 2960X IOS version: 15.2(3)E C2960X-UNIVERSALK9-M
Cisco 4500X IOS version: cat4500e-universalk9.SPA.03.05.00.E.152-1.E.bin
Thanks for your help,Hi Reza,
Thanks for your help
I can not confirm that because I have a few switch have the same problem.
C2960X 10G port 1 is connected to C4500X slot 1, Port 2 is connected to C4500X Slot2.
link flapping, On the switch port 2.
I need to do a more precise test to confirm the problem is C2960X or 4500VSS -
Hello, everybody!
I have a proyect to implement the feature VSS, with two catalyst 4500-X, it will be the layer Core/Distribution.
So, I want integrate in the catalyst 4500X, Inter vlan routing (SVI) and vtp domain, in the layer access, we´ll have SW 3750-X with PoE.
Is possible configure SVI in my catalyst 4500-X. to separate traffic across VLANs. and the routing will be in the 4500X too. ???
My customer does not have sufficient space to mount the serie 4500E in the Rack, so he prefer the 4500-X.
Help me!
Thanks!
RegardsHi,
Is possible configure SVI in my catalyst 4500-X. to separate traffic across VLANs. and the routing will be in the 4500X too. ???
Yes, there is no different between a VSS pair and non-VSS when it comes to SVI and inter-vlan routing. It works the same way as if the 4500-X ware separate.
HTH -
2960-X stacking, 5 switches with interwoven 0.5 M cables
I am trying to understand how to connect 5 switches using 0.5 M cables only. I have read this "best practices" document, but it leaves some unanswered questions.
http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-2960-x-series-switches/white_paper_c11-728327.pdf
I would normally just daisy chain the switches and bring a connection from the bottom switch back up to the top to create a "ring" topology. But the documentation also states that switches can be connected with "interweaved cables". It makes no statement as to what if any performance considerations should be taken into account when designing stack interconnections, or whether this interwoven topology creates any operational complications. The only requirements that I have seen is that each switch must have 2 operational FlexStack links in order to be fully redundant and to fully utilize all available bandwidth. Does anyone have any guidance in this area?
Assuming no negative consequences by using the "interwoven" topology, does this make sense?
Thanks,
-JeffWell it probably wouldn't be confusing if I could find a clear set of ground rules. The documentation mentions "FlexStack protocol", but the discussions seem to indicate that this is a control plane protocol. Do the stacking modules operate as ethernet bridges when making forwarding decisions like any other switch port? If the answer is yes then at least I understand the principal of operation. But now if you throw multi-chassis etherchannel uplinks into the mix divining general layer 2 paths becomes a little murky.
Although now that I look at it, using this cabling has an advantage over a straight ring topology. Once a frame hits the stack it is never more than 2 hops away from it's destination. With daisy-chained switches it could be up to 4 hops. This is of course assuming standard 802.1d-like forwarding. This may be an invalid assumption. I don't see any way to get spanning tree info for the stack ports.
(EDIT: standard ring topology would also have a maximum of 2 hops to any switch, not 4)
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