Cisco Switching/Routing :: Connecting 5548 Pair To 2 6509 Core Switches / No Vss

Jun 8, 2012

connecting a 5548 pair to our core 6509s.  Just want to be sure we don't introduce any issues into the network.The 6509's are connected and perform all the routing.  Essentially, we're moving away from a 3750 stack in the data center and the 5548s are the replacement.  We'd want to limit the vlans to the specific server network vlans. Our current setup is a port channel between the 3750 and each of the 2 6509s for redundancy. I'd like to use the same functionality when we connect the 5548's but I'm looking for what the config should look like to ensure no spanning tree loops are introduced and that it is configured optimally.

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Cisco Switching/Routing :: 3750 Stackable Switches And 6509 Core Switches

Nov 14, 2011

If I have two stackable switches were only one stackable switch has two uplinks one uplink goes to one core 6509 switch and the other uplink goes to the other 6509 core switch can a Layer 3 etherchannel be used if each uplink go to a different core switch, by the way hsrp is running between both switches and also can you give an example how data will be routed from the stackable switch through the ethernetchannel to one of the core switch accross the WAN to another core switch?

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Cisco Switching/Routing :: Using 6509 Series As Core Switches

Jun 2, 2012

we are using cisco 6509 series switches as core switches. and Cisco 4510,4507 series switches as edge switches. all the vlans are created at core switches and propogating to edge switches through VTP. we are using OSPF as routing protocol at core switch for internal routing. till now we are using 4510,4507 switches as layer 2 switches. Since, 4510 & 4507 switches are hign end swithces i want use them as layer 3 switches instead of layer 2.if i change these switches from layer 2 to layer 3 does it make any impact on our network or better to keep them as layer 2 switches.if i change these switches to layer 3 is there any advantage i will have.

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Cisco Switching/Routing :: Adding UCS 6248UP To 6509 Core Switches?

Apr 21, 2013

In the next couple weekends I'm planning to add 2 CISCO UCS 6248UP Interconnects to 6509 Core Switches via 10G links.
Is there any impact anticipated?  It's a production environment and no loss of up-time is acceptable.

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Cisco Switching/Routing :: View Capacity Throughput (backplane) Of Core Switches (6509)?

May 30, 2012

How i can view the capacity throughput (backplane) of core switches (6509)? How i know much is in use?

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Cisco Switching/Routing :: Pair Of N7K Distribution Switches Connected To A Pair Of Aggregation Switches

Mar 11, 2012

We have a pair of N7K distribution switches connected to a pair of N7K Aggregation switches.We run vPC on both pairs of n7k's.

-n7k-d1 has two interfaces in a Port-Channel connecting to n7k-a1 & n7k-a2. (PC1)
-n7k-d2 also has two interfaces in a Port-Channel connecting to n7k-a1 & n7k-a2. (PC2)
My problem is that Spanning-Tree is blocking PC2 and all traffic from n7k-d2 is traversing the Peer-Link before reaching the Aggregation layer. Is this the best design for connecting two pairs of n7k's with vPC or if a better design would be to connect all 4 links into the same Port-Channel and vPC?

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Cisco Switching/Routing :: Configuring Nexus 5548 Pair For VLAN?

Mar 18, 2012

I currently have two Nexus 5548UP switches in my environment running the latest code (n5000-uk9.5.1.3.N1.1a.bin).  Both of these switches are connected via a VPC Peer Link (two ports on each switch in an Ether Channel) and a VPC-Keep Alive Link (a dedicated port).  Hosts connect to each switch via a VPC for both IPV4 and FCOE.
As of right now, everything works.  I currently have a stack of two 3750 switches that each Nexus is connected to.  This stack is doing all the Intra-VLAN Layer 3 Routing for the Nexus Switches.  However, I plan to get rid of the 3750s, and move the Layer 3 Routing the Nexus 5548's, so the backplane is 10 Gig instead of 1 Gig..  I have the Layer 3 Daughter Card installed in both switches, as well as the LAN_BASE license.
So, at the moment, I am trying to find the best way to accomplish Layer 3 Routing on these two switches. Since the Nexus switches are not stacked, and the FCOE portion of HA is taking care of by the Multipathing agent on each host, I believe am just concerned with providing Intra-VLAN routing in an HA build where if one switch goes down, VLANs still route through the other switch.

Again, since the Nexus switches are not stacked, I am guessing the best way to handle this is with HSRP, but my experience with that has always been with routers that have a switch in the middle.  Can I make HSRP work without having a switch between the Nexus switches?  Can I track the VPC peer link, or how do I do it?  I guess I am looking for a sample config.
Let's pretend I had two VLANs:
VLAN 20: - GW and 
VLAN 40 - GW and
And I wanted the Nexus switches to route these VLANs regardless of which switch was up / down..

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Cisco Switching/Routing :: Inter-connecting 3 Core 6509s Switches

Jan 19, 2012

I currently have 3 core switches on my campus.  They are 6509 catalyst switches.  They currently are not interconnected to each other.I want to interconnect them to each other.  The IP addresses of each core sit on a interface Loopback500. [code] How can I interconnect each core to each other and what IP scheme could I use.  I want them to be straight L3 to each other.

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Cisco Switching/Routing :: Nexus 5548 And 6509 VPC Connectivity?

Nov 12, 2012

We have two 5548 switches connected to a pair of 6509 running in VSS mode. I am trying to understand the benefit of having bridge assurance on the uplink ports.
If we have the command spanning-tree port type network enabled we cannot do a non disruptive upgrade. If there is bridge assurance on the uplink it warns you of this. Yet if I do not run bridge assurance on the uplinks I can do a upgrade without any disruption.
Why in god would I enable bridge assurance on this VPC link if I cannot do a non disruptive upgrade?

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Cisco Switching/Routing :: 6509 VSS Implementation As A Service Module Core

Jun 8, 2011

I m planning to implement VSS in core but want some inputs on IOS as i have FWSM as a service module Core :- Ii am running 12.2(33)SXH2a on my Core 6509  and i checkd cisco sites and Fwsm release notes but it states only  I-Train of IOS while mine is H-Train so can I directly upgrade to  I-Train or I was thinking of SXH8b IOS.

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Cisco Switching/Routing :: 2 Internet Connection Connected To Same Core Switch 6509

Jan 25, 2012

i'm already has one internet connection is conecting directily to the Core Switch 6509, and the Switch is route any internet request with default route:
SW6509-conf)# ip route is --> Next hop for the DSL router internal IP, and it's working fine.
We have a new internet connection with another ISP/ with another DSL router, how to connect both of them to exit from the Core Switch 6509.
is it ok if i make another default route to the Next hop to the new DSL router as:
SW6509-conf)# ip route is --> Next hop for the new DSL router internal IP.

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Cisco Switching/Routing :: 3750 / 6509 - Upgrade Core Switch Without Disrupting Network?

Feb 2, 2013

I am planning to upgrade the current core switch(3750) to 6509 series switch. Since we have a production network running we have to plan for an online core switch upgrade.

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Cisco Switching/Routing :: 6509 Core Switch Command / IP PIM Sparse-dense-mode

Oct 23, 2011

What is PIM? give me an example when I will use and not use the PIM command.

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Cisco Switching/Routing :: 3750 Stackable Switches Etherchannel To Core Switches

Nov 18, 2011

If I have two stackable switches one switch uplinks to one 6509 core switch and the other connection uplinks to another 6509 core switch, and also the other stackable switch does not connect to the core switches. Because I am using hsrp and also we are not using vss then one uplink to the core is not in used only ones is so then how does creating an etherchannel between does two uplinks to both core switches benefit me in anyway such as more bandwith and using both uplinks at the same time or I'm I wrong?

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Cisco Switching/Routing :: Limit For Creation Of Port Chanel In Core Switch 6509 And 6513

Feb 20, 2012

How much is the limit for the creation of PortChanel in a Core Switch 6509 and 6513?Is there a limitation byu hardware?

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Cisco Switching/Routing :: 5548 - Possible To Have More Than Two 5500 Switches Peered In VPC

May 7, 2013

We have successfully peered two 5548UP switches together and separately we have successfully peered two 5596UP switches together. Works great and is our standard going forward for data center switching. I've been casting about Google and Cisco looking for an answer to this question:
Is it possible to have more than two 5500 class Nexus switches participate in a peered vPC configuration? For instance, can I connect a single FEX to four 5500 class switches in a vPC configuration? The question is more academic than actionable. Even if the answer is yes we probably wouldn't be in a position to implement something like this for a while.

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Cisco Switching/Routing :: Two Subnets Through Pair Of SG200-08 Switches

Mar 21, 2012

I have two separate companys both with staff at two locations and thier own networks connected with a wireless antenna which provides a high speed LAN connection between offices.  I only have a single path through this antenna bridge.  I have an SG200-08 switch at each end.  What I am attempting to do is utlise the switches to take the two subnets at one office, combine them to one for transfer through the antenna bridge, and then resolve them into the two separate networks again at the other end.

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Cisco Switching/Routing :: Connecting Core Switch To Firewall 3750x

Apr 13, 2013

I have a 3750X four-switch stack acting as the core of a fairly simple LAN. All I need to achieve (and this seems inordinately hard, but it is entirely likely that I'm just being dense) is to get access to the internet through my core switch, through the firewall and out through my VSAT. I've spoken at some length with the firewall providers (Cyberoam) and they tell me all I need to do when I migrate onto my new system (Cyberoam is currently in place at the entrance to our existing LAN) is change the local IP address of the Firewall, plug in the new switch to the LAN port, and away I go. Tried that, didn't work, so obviously I'm missing something.

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Cisco Switching/Routing :: 5548 Add Access List To Both Switches Not In Config Sync Mode

Mar 21, 2012

I have two 5548's in sync mode: I have an existing ACL and I want to add a new line to it, but after I do and try to commit it states the verify failed. [code]

I have to add access list to both switches not in config sync mode.

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Cisco Switching/Routing :: 4900M / 2960 - Two L3 Switches As Redundant / Mated Pair?

Nov 6, 2012

There are two Cisco 4900M L3 switches and two Cisco 2960 L2 switches. I need to configure the two L3 switches to operate as a redundant pair, as the servers connecting to them are connecting using bonded interfaces, which can only have one default gateway. So these two L3 switches need to have the same Vlan interface 1, 2 and 3 IP's set onto them.How are the two L3 switches made aware of each other? via a normal trunk? Is there some special configration for configuring a mated/redundant pair of switches? or are they both just configured as though they were the same switch, but linked?

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Cisco Firewall :: FSWM Active / Standby Installed In 6509-E Core Switches

May 9, 2011

I have FSWM active/standby installed in 6509-E core switches running following FWSM Firewall Version 3.1(3) Device Manager Version 5.0(2)F..I want to upgrade to latest FWSM version as well as ASDM, I downloaded asdm-622f.bin and c6svc-fwm-k9.4-1-5.bin from cisco portal. When i checked the show version of FWSM, it says..The Running Activation Key is not valid, using default settings: Running Activation Key: 0x00000000 0x00000000 0x00000000 0x00000000
I have gone through threads on CSC about how to upgrade FWSM in failover mode, now my concern is, Do i have to take care about activation key or keep as it is ? I have maintenance contract with cisco for all devices.

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Cisco Switching/Routing :: High CPU Utilization In 6513 Core Switches

Apr 8, 2012

we have two 6513 core switches redundant to each other by using HSRP and MST. Currently we have a problem in a CPU as it's high in both cores as appeared in the following logging message:
1: 04/09/12 16:06:20    7/-1: MAJ, GOLD,
test_sp_rp_inband_ping[7]: diag_hit_sp_sys_limit. SP-RP Ping Test skipped. Reason(s): netint_thr_active[1].


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Cisco Switching/Routing :: 6500 / Connect A Juniper SRX Firewall To Core Switches?

Mar 17, 2013

Assume that we have 2 Cisco 6500 series which redundant via GLP, now my question is how can we connect a Juniper SRX firewall to our core switches?

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Cisco WAN :: Pair Of Nexus 5548 And 3750 Are Configured With MST Instance

Feb 8, 2012

I am having some issue with SPT with the following topology.Pair of Nexus 5548 and 3750  are configured with MST instance 1.when enable STP as MST on Dell switches , it does not recognise it and create loop but if We change MST0 (only tried on one 3750 and two Dell switches in triangle in lab). its work fine.Does Dell switches only understand MST0 ?Can Nexus 5548 support MST0 if we change from MST1 and what will be effect?

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Connecting Access Switches Directly To Core Switch?

Apr 30, 2011

Is this a good idea to connect access layer directly to core layer with fiber and omit the distribution layer?

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Cisco Switching/Routing :: 3750G - Multiple Trunks From Core To Access Switches Without Loop

Feb 5, 2013

We have a Cisco 3750G Core switch which has physical connections, each configured as trunks to two HP Access switches. The client who uses these access switches would like to put a link between the two, but this would create a loop.
------- Core Switch -------
|                                          |
|                                |


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Cisco Switching/Routing :: 3750 / 4507 - Upgrading Core Switches With Nexus 7010

Feb 8, 2012

The company I work have finally decided to enter the 21st century and invest in a new telephone system (Interactive Intelligence) to replace the legacy system which has served us well for the past 10 years. The project has only just started and involves upgrading sections of CAT3 cabling to CAT6, replacing Cisco 3550 switches in one area of the building with Cisco 4507 switches and upgrading our Core switches with Cisco Nexus 7010's. The area that concerns me most is enabling the network for qos as I have very little experience with it. At the moment Im trying to read as much documentation as I can on QOS to bring myself up to speed.
The access layer switches will consist of a mixture of Cisco 3750 & 4507 switches connected to Cisco Nexus 7010 switches which will form a collapsed aggregation & core layer.
Basically, how I should approach this daunting task of making sure the network will support VOIP.

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Cisco WAN :: 6500 - Connecting Servers To Core / Distribution Switches

Feb 10, 2013

We are using CISCO Catalyst 6500 switches as collapsed core/distribution switches (2 layer architecture). I want to connect approximatly 10 application servers to the network. Can I connect the servers directly to the catalyst 6500 switches using WS-X6148E-GE-TX line cards? The other option is to use access switchs and then connect the servers to the catalyst 6500 through access switch(Catalyst 3750).

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Cisco Switching/Routing :: 4503 / 3560X - Core And Access Switches In IPTV Network Infrastructure?

Jul 8, 2012

recommend a cisco core switch and access switches in IPTV network infrastructure?I was ask to implement a network for IPTV system but i don't have idea what will be the model i will use.
Core Switch = Cisco 4503
Access Switches = Cisco 3560X

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Cisco Switching/Routing :: Configure 3750 Stack As Core / 2960 As Access Layer Switches

Sep 29, 2012

I configure 3750 stack switch as core and 2960 stack switches as access layer switches.I connected my laptop to one of my core stack in VLAN 10 and I am pinging to one of my server in VLAN 1. What will be the minimum latency at the time of inter VALN routing

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Cisco Switching/Routing :: Output Queue Drops On 3750 Core Stack And 3560 Edge Switches

Jan 10, 2013

I've been fighting what seems to be an increased number of outqueue drops on our core stack and edge switches for the last 3 or 4 weeks.(The core consists of a stack of 5 3750s in 32-gig stack mode. The wkgrp switches are 3560s. all are at 12.2.52) The  wkgrp switches are directly connected to users. We use Nortel IP phones with the phone inline with the user PC. auto-neg to 100/full. [code] However I have tried turning off QOS on a couple of workgroup switches (no mls qos, but left individual port configurations the same) but am still seeing drops.Since I have disabled qos on the switches in question (no mls qos)  (not the core tho) I am presuming these commands have no affect on the switch operation and therefore cannot be related to the problem. With QOS turned off one would presume that it is general congestion - especially at the user edge where busy PC issues might contribute. So I wanted to see if I could see any instances of packets in the output queues building up.
 I wrote some scripts and macros that essentially did a snapshot of 'show int' every 20 seconds or so, and looked for instances of 'Queue: x/' where x was greater than zero.What I found after several days of watching the core stack, and a few of the workgroup switches that are most often displaying the behavior, was that I NEVER saw ANY packets in output queues. I often saw packets in Input queues for VLAN1, once in a great while I would see packets on input queues for fa or Gi interfaces, but NEVER on output queues. [ code] Additionally, when I look (via snmp) at interface utilization on interfaces showing queue drops (both core and wkgroup), they are occurring at ridiculously low utilization levels (as low as 4 to 8%). I've tried to look for microbursts between the core and a wkgroup switch where the core interface was experiencing drops, but haven't seen any (using observer suite). [code] While the queue-drop counts aren't critically high at this point, they are happening more frequently than in the past and I would like to understand what is going on... In most cases, no error counters are incrementing for these interfaces. Is there some mechanism besides congestion that could cause output queue drops?

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Cisco Switching/Routing :: 6509 Switches Which Are Running In VSS

Feb 15, 2011

I've upgraded a 6509 switches wich are running in  VSS, from IOS 12.2 (33)SHI1 to 12.2 (33)SHI5. After that I'm facing the folowing log messages periodically. [code] I know that this is a diagnostic result from TestUnusedPortLoopback feature. But this interface is disabled (shutdown).

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Cisco Switching/Routing :: HSRP Between Three 6509 Switches?

Jan 8, 2012

I want to setup HSRP between three 6509 switches with a single virtual ip for all the three switches.
know if its possible and share any site or config.

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