Questions tagged [vss]

For questions about Cisco Virtual Switching System (VSS). For instance, you want to convert your 6500 Series switches with Supervisor 2T to run as one virtual switch. Therefore you have questions about how to enable VSS and what to consider before doing so.

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VSS for layer 3 only 6500

I have 2 6500 at the core, that have only L3 links to the DC and the campus. I'd like to set VSS but I'm wondering if it's possible in such scenario. It uses OSPF for the routing. I'll have the ...
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2answers
456 views

VSS back to back like vPC back to back

I know vPC back to back to avoid spanning tree between two pairs of Nexus. But I've two 4500 pairs and I need to connect them. Is there a way to do something similar to the vPC back to back to don't ...
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2answers
570 views

mLACP or vPC on L3 interfaces

I just want to know if it's possible to implement mLACP (with VSS) or vPC on L3 interfaces. I just can't find any answer to this on cisco doc. Thanks,
5
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1answer
183 views

Cisco 6500 Series and Safe Harbor Testing

It's time for our company to upgrade our Core switches (2x 6509 Sup720 in VSS). My question is if we should care about choosing a IOS image which has the certification "Safe Harbor" or not since the ...
1
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1answer
2k views

Alternatives to VSS and vPC?

Is there any alternative to Cisco's VSS or vPC? I mean not with other vendors, just Cisco? Because I'm planning a new network design here in our company and I'm not really sure, if there's an ...
4
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2answers
2k views

Stacking Cisco Catalyst 3850 via Fibre?

I'm working at several new network concepts for our company and the challenge is to stack at least two Catalyst 3850 over a distance of 200-300 meters. I know there are other possibilities like VSS or ...
2
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2answers
841 views

Multi-Node VSS core, how to configure?

In this diagram we have 4 Cisco 6500 switch, which are connected via standard 10 GB VSL links. The questions are: Since we could only have one Active and one Standby, which one of these switches ...
3
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3answers
2k views

VSS between 4503-E & 4507+E

Is it possible to deploy VSS configuration between Catalyst 4503-E and Catalyst 4507+RE ? This is what I am trying to do, but at VSL establishment I get the following error messages : *May 26 04:35:...
4
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1answer
2k views

6807XL CPU process stuck at 25 / 30 %

I've recently installed a new 6807XL Chassis in VSS in my datacenter. After 3 weeks, I keep seeing the CPU usage around 25% (per second, per minute or per five minutes). Looking at the historical ...
5
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2answers
2k views

4500E / 4500X VSS pairing

Is it possible to combine a 4500E with a 4500X into a VSS pair or do they have to be the same model to pair up? If it requires same model, is it due to hardware or software? For example if it is ...
11
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3answers
1k views

Does Cisco 6500 VSS improve or hurt MTBF?

I understand the benefits of the Cisco 6500 VSS with the obvious selling points of single management, single routing instance, STP elimination, port-channels across chassis, etc. With two standalone ...
12
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1answer
4k views

NX-OS peer-switch issues with 6500 VSS

I'm bringing up a new pair of Nexus 5500s running NX-OS 5.2 and I'd like to make use of the new vPC Peer Switch feature: The Virtual Port Channel (vPC) peer switch feature addresses performance ...
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3answers
3k views

Why we get high fluctuation on bandwidth measurement Cacti graph?

We were on redundancy test of Etherchannel and Routing on our network. During this intervention we made some measurement. Our monitoring tool is Cacti for graph. The equipment monitored is a 4500-X ...
11
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3answers
6k views

What are the alternatives to OTV for stretching a layer 2 network across 2 datacenters?

We want to find a "safe" way to stretch layer 2 network across 2 data-centers, and since we don't have any equipment running NX-OS on either data-centers we can't use OTV. So what are the alternatives ...
11
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1answer
803 views

UDLD in VSS configurations

Since a VSS is a single system image, does it make sense to enable UDLD for links between the switch pair? We've seen some recovery problems that we feel might be due to UDLD mistakenly identifying an ...