Cisco :: RSTP Configuration - 14 Switches Interconnected In Ring?

Apr 2, 2013

I need to setup a layer 2 network consisting of 14 switches interconnected in a ring. Obviously, the design of 14 switches in a ring network is dumb, not here to debate that. Unfortunately, it HAS to be a ring. I've been researching the best way to configure RSTP for this. From everything I've read all I really need to do is configure Primary/Secondary root bridge in the center, and change the Maximum Age field to at least 16 seconds? From what I've read you want a minimum of 3 second buffer + 1 second for each hop due to message age being added by each switch hop?

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Cisco Switches :: Quoting SF302-08P For Client Having Offices Interconnected

Nov 8, 2011

i am looking at quoting the SF302-08P for a client which will have three small offices interconnected via single mode fiber. I am planning on connecting them to a 3560 switch. Each office will have no more than 3 - 7942 phones. I reviewed the notes on this switch and it seems it should support this phone type without any issues. Any support/reliability issues with this switch and the 7942s ?

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Cisco Switching/Routing :: 6509-E Switches Interconnected On Layer 3 Port Channel

Oct 3, 2012

We are currently designing  Layer 3 to the edge EIGRP solution  for our customers. The network is a hybrid of collapsed  core (Core to access) as well as a three layer design (Core/Distro/Access) for connectivity to the Data Centre, Internet, Wireless Blocks etc.The  core of the network contains two 6509-E switches interconnected on a  Layer 3 Port channel (no VSS). Access Layer switches (3750-X series running Stackwiseplus protocol)  connect to the core switches over p2p routed links and Distribution layer switches (3750X stackwiseplus) provide connectivity to the  Data centre, Internet, wireless blocks etc.
 
The access and distribution switch stacks(Cisco 3750-X) are set up with two or three member switches with uplinks multihomed to the primary and secondary core switch with each uplink included in EIGRP. In each of the stacks, one of the switches controls the operation of the stack, which will be  the stack master.As the Cisco Stackwise architecture is not SSO-capable but NSF aware, all Layer 3 fuctions must be re-established during a master switch outage. To minimize control plane impact and improve Layer3 convergence, uplinks should be diverse and originate from the member switches instead of the Master switches in the respective stack. This is as per Cisco recommended design solution.The above solution can be setup if there are more than two switches in the stack. i.e. uplinks are configured on the backup member switch modules.
 
1.But what about stack with two switches..Which switch should be set up as the Master for a two member stack with uplinks to the core primary and secondary from each switch(Master and Backup)
 
2. For Layer 3 routing, does the routing takes precedene over switch failures? Say for eg. In a two member stack, the master switch with uplink to primary fails, does EIGRP provide a fast convergence to route traffic via backup secondary and does not wait for the control plane on the switch stack to converge? All the access to core links will be set up for ECMP.

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Cisco Switches :: Configuring ESW-520-48P For VoIP / Ring Central

Apr 26, 2011

I am looking for a Best Practices or a few places to pay attention to in the Cisco ESW-520-48P switch I have. My VoIP solution is RingCentral, and while they are Cisco phones, I've been hestitant to setup VLANs etc. the way I am used to. Plus setting up Auto QoS seems different than what I am used to with a 3750 switch.
 
Right now I've left the Smartports Wizard alone, and none of the ports are configured. There are no VLANs or QoS on the LAN currently.
 
What I was running into were calls cutting out where one side wouldn't hear the other anymore, but the call would remain connected. However, this has happened in this small 15 person office, when there is only one employee here after hours, talking on the phone. There isn't any heavy network traffic, because I have network monitoring showing me low usage (no streaming music, videos, or anything else).
 
This switch has a Gb connection to a Linksys SR2024 (the server switch), which is also set at Factory Defaults. I mention that because I recently bypassed the ESW-520-48P, and plugged one phone into that switch and the RingCentral phone worked fine for outside calls.
 
Is there something besides QoS that I should look at in the ESW-520 switch that might be causing a checkpoint of some sort, or interrupting VoIP traffic that I need to configure or disable?
 
And are there any Best Practices or scenario guides for this switch? I found the Admin Guide, but it really just explains every option in the GUI for the switch. And it seems all of my CCNA training isn't working with going in and quickly troubleshooting this switch besides knowing that something in it could be hanging it up.

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Cisco Switches :: Connectivity With SGE2000 In Ring Topology?

Oct 10, 2012

I´ve got a strange problem with the connectivity within a ring topology.There are five switches from the SGE2000 series and one SG200-50.The SG200-50 is the root bridge and RSTP is configured.From the root bridge switch (Switch 5) I can ping Switch 0.But I cannot ping Switch 0 from PC0.

On the other hand I am able to ping all other Switches (1-5) from PC0.In addition to that I can establish a RDP connection from PC0 to Server0.This tells me that there is no general problem with the connection from PC0 to the Switch0.
 
Right now when I want to configure Switch0 the only way is to connect to Server0 first.But we have to move Server0 and this is why I want to manage Switch0 from PC0 like any other Switch on that network.

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Routers / Switches :: RSTP Status Is Flapping With Broadcast Data?

Mar 16, 2011

RSTP port role in the switches are flapping if broadcast data is flowing through the ring. Also I've tried applying broadcast suppression to all the port to 64kbps for ports of 100Mbps/1Gbps, All the devices I'm using are L2 switches.

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Cisco Switching/Routing :: Nexus 5010 Interconnected With Two UpLinks

Dec 11, 2011

We are looking for some latency in our net and I am trying to check if our STP implementations is running correctly - we have a simple flat network here and no blocked ports here - just two nx 5010 which are interconnected with two uplinks.A remote site - mirrored setup - with 2 10G dark fiber connections - one for each nx5010 - is connection a DR site. I have split the two sites in two stp domains by enabling bpdu-filter on the vpc between the two sites.

I have been running wireshark on the local segment for some time and see the STP RST ROOT announcement every 2. seconds  - this is probably normal ? I was looking for some alternate root negotiation packets which would cause the mac tables to be flushed.

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Cisco :: Moving PVST To RSTP / LAN Environment?

Jan 23, 2013

Currently I'm with a pure Cisco shop, running every LAN Switched infrastructure (even in the HQ datacenter) with PVST+, I'm noticing in the documentation I've read and labs I've created that RSTP is... great, and I've observed that even the uplinkfast functionality seems to be build in by just enabling rapid-pvst. Of course I'll propose a migration plan, document the network, diagram it entirely and provide effective steps to implement the change, but that's assumed from any get'go.

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Cisco Infrastructure :: 2950 - How To Enable RSTP

Feb 23, 2006

how to enable RSTP in the switch (Let's say in 2950 switch).
 
Or do you have RSTP running in now-a-days switches?

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Cisco Switches :: QoS Configuration On SRW2024 And SGE2000 SBS Switches

Jun 26, 2011

I have a Campus LAN setup which is layed out using Cisco SRW2024 and SGE2000 SB switches. On the LAN we are running various services. These are CCTV, VOIP(SIP), Public Address(multicasting) and Internet hotspots to various locations. I have attached a layout of the setup. A unique VLAN is setup for each of these services.The problem we have is that the PA audio is breaking up at intervals making the output distorted this is also happening for the SIP phones within the facility. Using the user guide we have tried to setup QoS on the system but we seem not to improve the services.

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Cisco Switches :: How To Erase All Configuration In ESW 500 Series Switches

Aug 21, 2011

How to erase or remove  configuration file from ESW 500 Series Switches?

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Cisco Switching/Routing :: ME3600 Does Not Support Rstp

Apr 24, 2013

i have some ME-3600x. some of version 12.2 and one of version 15.5. te last one hast same config as all other. but if i check for rstp it sends.i know abount global config commands:
 
-spanning-tree mode rapid-pvst
-spanning-tree extend system-id
 
but there is no spanning-tree support. this causes many more problems. so it is important to solve spanning tee at first.is it possible without downgrading this device?

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Cisco WAN :: 3560X Not Found RSTP Feature In Switch

Apr 6, 2012

My entire switching network is enabled RSTP and I have purchased a new cisco 3560X series switch and I have not found RSTP feature in my switch.Is it available if I change the image? will cisco switches supports RSTP?

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Cisco Switching/Routing :: 6500 - STP Mode MST To RSTP

Mar 20, 2012

I have a network with spanning-tree mode mst, but, we want change this for spanning-tree mode rstp. I have two cores(6500) and need know what is the better mode for change this with no impact in my network?
 
We dont have distributing layer, like a "topology" below.
 
ACCESS LAYER SWITCHES
                  |
                  |
---------------------------------
|CORE1 ------ CORE2 |
--------------------------------
                 |
                 |
           SERVERS

CORE1 CONFIG
spanning-tree mode mst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
spanning-tree uplinkfast
spanning-tree backbonefast(code)

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Cisco Switching/Routing :: 3750 - RSTP Not So Rapid

Oct 30, 2008

When I plug in a workstation to 3750 switch - it seems to take about 35 seconds before that workstation (hard coded IP) can ping the switch.  You can see the console messages below.  I configured RSTP and set this switch to root:
 
spanning-tree mode rapid-pvst
spanning-tree extend system-id
spanning-tree vlan 22,33,44 priority 8192

[Code].....

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Cisco WAN :: 3560X With IP Base In The Ring

Dec 27, 2010

I'm planning to use 2 3560X (access switch) on two different locations connected over two 2921 routers in small ring. 3560Xs are directly connected via fiber. Each 3560X is conected to its own 2921, and 2921s are connected together with GRE over IPSec. So they are creating ring.I'm planning to use small area 0 in this scenario. There are less then 200 routes in the network. Will 12.2(55) IP Base on 3560X support this scenario or I will need IP Services image? "OSPF for routed access" is still little vague to me, there are only tipical case study scenarios.

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Cisco Switching/Routing :: 7609 Slow RSTP Convergence

Nov 22, 2011

I have a 7609 with two LAG groups (Etherchannel not LACP) going to two separate devices that DO NOT participate in spanning-tree (Occam gear if you must know). I'm running 802.1w across the LAG groups but the convergence time is terrible! In essence, the 7609 is running spanning tree against itself (between the two blades). What can I do to fix my configuration?
 
If I disable the ports on the equipment connected to g1/17 & g1/18, it takes ~30 seconds for spanning tree to start forwarding on g2/17 & g2/18.When I bring the ports back up on the other side of g1/17 & g1/18 which are in a lag group, g2/17 & g2/18  immediately go into block mode while g1/17 & g1/18 start learning for another ~30 seconds!! [code]

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Cisco :: CUCM Feature Ring Like CUCME

May 28, 2012

I've looked in many places but cannot see how or if it is possible to configure a phone, in CUCM to have a feature ring instead of the normal ring.In CUCME you go into the ephone x configuration mode, and assign the DN to the phone with the button xfx command. What this gives you is a slightly different ring tone when a call comes through. If I am not mistaken it is the same ringtone they use on the show "24".Is there a way to do this "feature" with CUCM?

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Cisco WAN :: 2912 Token Ring Support On ISR G2

Dec 5, 2011

My customer wants to replace some Cisco 2912 by new routers, but I can't find a way to add Token ring Network Module on  2951 or 3925 routers with the Cisco configuration tool.Does token ring is still supported on ISR G2 routers?

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Cisco Switching/Routing :: How To Configure RSTP On Catalyst 3650 And 2950

Aug 3, 2011

Configuring a network with Rapid Spanning Tree Protocol. There's a combination of Cisco 3650s, 2950 and 2960 switches. It is a flat Layer 2 network with a single VLAN. CLI configuration?

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What Is The By-pass Mechanism Used In Ring Topology

Feb 2, 2012

the by-pass mechanism used to isolate the fault if any link fail.

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Cisco :: VoIP Phones Customization - Ring / Backgrounds

Mar 12, 2012

has anyone here played around with uploading compatible audio files for custom rings and MOH and/or personalized backgrounds for the phones? I was only taught the basics in our CUCM v6.0.1 and am looking to figure out how to get some good music on my phone as well as play around with other "cosmetic" features. The phone I'm testing with is a 7971(color).

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Cisco Switching/Routing :: 4948 - RSTP Poor Convergence Time 30 Seconds

Dec 26, 2011

What's wrong with my config? If I shutdown a port or pull a link it takes ~30 seconds to converge.
 
I have set spanning-tree portfast default on the 4948's. Is it proper to set my uplinks on these switches (g1/1) to shared or does that disable RSTP?
 
Switch 1 & 2 are 4948's running 12.2(54)
Switch 1 & 2 are connected on port 43
 
Switch 1 port 1 is connected to the 7609 12.2(33) SRD5 on port g1/2 Switch 2 port 1 is connected to the 7609 on port g2/2
 
I have a host on Switch 1 port 42 for testing.

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Why Dual Ring Network Is Counter Rotating

Jan 31, 2013

In the Dual ring network using the token passing method, we have the primary ring and the secondary one where in the normal situation only the primary ring is carrying the token in one direction and when this ring is down the secondary will start into operation and takes the token and rotate in the inverse direction of the primary to reach its destination. Why the secondary ring doesn't continue in the same direction to the destination?

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Transfer IPTV Signal To All Sites Along The Ring?

Apr 26, 2011

My topology is a physical ring, and I need transfer IPTV signal to all site along the ring.For example:

A (headend)--- B --- C --- D
|______________________|
Note: -----: have spoke-mesh defination
_____: no spoke-mesh defination to prevent loop

So, with MPLS/VPLS I can implement it. With spoke and mesh defination, the traffic can transfer form A to B, C or D as drop-continute action in ring topology (between different VC). Everything is good, FRR can work very fast. But when the topology have a failure link, for example the link between B and C, at that time the traffic will go from A to B then B come back to A and A --- D ---C. This action is so stupid, because it can increase delay, jiiter in network. On the other hand, when the node failure ( B failure), C will loss the IPTV signal, even the link from A--D--C always good.

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Token Ring To Ethernet Network Converter?

Aug 27, 2012

I'm in a dorm room with an outdated token ring connection that includes phone line ports and cable for my television. In other rooms people are using this to convert their laptop/router to an ethernet portIt converts old token ring ports to ethernet.

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Cisco Firewall :: Polycom HDX 7000 - Video Calls Through FWSM Ring But Cannot Answer

Dec 26, 2010

Running FWSM Firewall Version 3.1(4)
 
The problem is that calls originating from the outside of the firewall to the inside will ring but you cannot answer. The internal video conference server is a Polycom HDX 7000. There are ANY/ANY rules to/from this server and the default application inspection policy is set for h323/ras/h225 as follows:
 
[code]...

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D-Link DCS Network Camera :: Focus On 920 By Adjusting Black Ring Around Lens

Aug 30, 2012

Just discovered I can change the focus on a DCS-920 by adjusting the black ring around the lens.  It can be focused from very close, just inches, to infinity.  I don't see this in any of the DLink documentation.

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Cisco Switching/Routing :: IE2000 Industrial Ethernet Device Level Ring Support

May 3, 2012

Have a potential customer that is looking at the IE2000 series switch and at the Rockwell Allen Bradley switch
 
Question is does it support Device Level Ring (DLR) capability.  I do not see this specifically mentioned in the Data Sheets but it talks about a
Resilient Ethernet Protocol (REP) and I am wondering if this is the same thing?

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Cisco :: QOS Configuration On 3750 L3 Switches?

May 28, 2012

We have PC's that connect through the Siemens IP phones and back to the cisco 3750 which is connected to our core 6500 via L3. The phones use a voice VLAN and the PC's use another VLAN. The whole setup seems to work ok but I was just wondering if the QOS was configured correctly. Our current config on our 3750 switches are mls qos trust dscp on the port that connects to the phone and PC and mls qos trust dscp on the L3 links. The phones are configured for "QOS L2/L3"From the reading I've done so far it seems that any ports connected to a L2 device should be set to cos and not dscp?

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Cisco Switches :: SF302-08 Configuration

Apr 6, 2012

How do I make the following work with Cisco 302-08G ? I have a 4-port Cisco wireless/wired router that allows for a guest account. I also have Cisco SF302-08 that I bought so I could use its port/vlan mirroring capability. How should I configure the network, given the aforementioned equipment,  so that I can get a single point sniff.
 
Assume I have two wireless clients, one using the "regular" wireless SSID, and the other using the "guest" SSID.  I can see 192.168.1.x (regular SSID) and 192.168.169.x (guest ssid)  on the internet side (one the same physical cat5 of the wireless router. So far so good. But, I would like to use 302-08 to actually allow the guest SSID/network comm cable)unicate with the regular SSID/network. For example, if I ping 192.168.169.x from 192.168.1.x, I would like to see a response. Can I make them communicate properly with the 302-08 ?? if so, what do I need to do ?? (I will also have wired clients tied into the 302-08..so its important that it be the central sniffer point).

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Cisco Switches :: SG 300 Configuration Assistant

May 11, 2012

I'm having trouble in connecting a SG 300 switch with CCA v3.2. I have already connected the switch with CCA, however I can't see anything in my CCA's Front Panel and Topology view. Here is the view of my Front Panel view after I connect the switch ?

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Cisco Switches :: SG 200-50 VLAN Configuration

Aug 24, 2012

I'm adding it to an existing infastructure, with multiple VLANs.  I believe I have it set up correctly, however whenever I daisy-chain the switch in with the trunk ports, it's not passing the VLAN info correctly.  There's not a lot of configuguration involved, so I'm not quite sure where I might be going wrong.  I've attached a couple screenshots that show my trunk port configuration. 

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