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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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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Nov 14, 2011
If I have two stackable switches one that connects to the 6509 core switch and the other switch does not, do I have to uplink the switch to the other switch so that switch has route to the core switch or because the switches are daisy chain there is not need to cable one switch to to the other switch connected to core switch?
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Nov 13, 2011
If I have two switches in a stack can both stack able switches be connected to a core switch through gbics or just only one switch can be connected to the core and the other switch connects to the other stack able switch through an Ethernet port which uses as a gateway to the core switch?
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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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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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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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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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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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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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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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Jul 5, 2012
Are the non-S series 2960 switches stackable or are they only able to be uplinked?
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Jun 23, 2012
I want to be sure for this before ordering: is the Enterprise-class stackable switches "WS-C3750X-48T-S" model can be stackable with "WS-C3750G-48TS" model.
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Aug 16, 2012
I'm building a wired closet to aggregate user's connections, Im planning to have 5x 3750X stacked switches and there is a need to run EIGRP, I'm thinking to order one switch with IP service image while the rest will run IP base image, is it workable scenario and what are the drawbacks of such combination of images ?
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Dec 11, 2011
I have a design for my infrastructure and i'm thinking to choose 4 or 5, or more, 2960 series in a stack mode instead of one 4500 series?
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May 6, 2013
can you stack a 3750 switch over fiber.....the answer is no, but the virtual switching supervisor 720-10G for the 6500 can create one virtual switch using two 6500s...
how can we get cisco to come up with a way for access switches to be stacked over fiber similar to above supervisor? i know of few of my site that would benefit from this...maybe they can come up with a vss appliance, similar to a media converter, to convert stackwise over fiber...then of course, you would need the same appliance on the other end....
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Jul 30, 2011
I'm building a wired closet to aggregate user's connections, Im planning to have 5x 3750X stacked switches and there is a need to run EIGRP, I'm thinking to order one switch with IP service image while the rest will run IP base image, is it workable scenario and what are the drawbacks of such combination of images ?
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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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Apr 17, 2012
Am looking into using stacking and NIC teaming to create redunancy for user access to servers. What I am thinking is getting 2 SG500-28 switchs and configuring them in a stack that appears as one logical switch. Now on the servers I would configure 2 NICs to be a team so they appear as 1 logical interface, perferably in an active/active configuration using LACP. In this NIC team take 1 team member to switch A and the other to switch B, so each team member is on seperate switches.
Givent the scenario:
1) Will that work with the 500 series switchs? Reason for the switches is their price point is perfect for my client.
2) Besides the stack link will there also need to be a LAG between the switches or does the stack link do data traffic also?
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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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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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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].
[Code].....
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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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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 -------
| |
| |
[Code]....
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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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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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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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Nov 19, 2012
I have 2 6509 switches configured with VSS.As per advised my managment I have to enable SSH but it is not available existing IOS which is "s72033-ipbase-z.122-33.SXI3.bin". SSH available in "s72033-ipbasek9-mz.122-33.SXI10".
upgrade the IOS with VSS configured switches.
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Dec 1, 2012
On our backbone (Cisco 6509) we have the following config.
spanning-tree mode rapid-pvst
spanning-tree extend system-id
spanning-tree vlan 1-200 priority 24576
1. is rapid-pvst the best spanning tree protocol to use? on some switches we have pvst (not rapid)
2. do all switches in the LAN need to use the same protocol?
3. does line 3 :priority 24576 mean that someone set tis switch as root manually? how can one further enforce the backbone as root (so noone adds a old switch with lower root id)
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Jan 24, 2013
I am trying to understand what load balancing method is used on a port channel on a Nexus switch . I have a server connected by a VPC to two Nexus switches. The nexus switches are only acting as layer 2 switches. I have a 6509 connected via a upstream link that does all of the routing for my VLANS. If have a server connected to the Nexus switches and it talks to a server on my 6509 what load balancing happens on the Nexus going across VPC 27 which is a layer 2 trunk going up to my 6509. Is it done on layer 2 or layer 3 flows?
My Nexus shows the default load balancing configurations
Port Channel Load-Balancing Configuration:System: source-dest-ip
Port Channel Load-Balancing Addresses Used Per-Protocol:Non-IP: source-dest-macIP: source-dest-ip source-dest-mac
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Mar 5, 2012
Is it possible to use two different load balancing methods at each end of a port-channel between two switches?
We have a Cisco 6509 at one end of the port-channel and a Cisco blade switch 3020 at the other end. Right now, we are using "src-dst-ip" at both end of the port-channel. We would like to change this. That is, we would like the #3020 switch to use "src-dst-ip" while the 6509 switch should use the "src-dst-port".
Why we want to do this, the reason is that we have FWSMs on the 6509. I've read that by configuring "src-dst-port" on the 6509, one can get a better performance of traffic going through the FWSM. However, the issue is that the 3020 switch does not support "src-dst-port".
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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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Feb 22, 2012
I had a sw/reset on my 6509 switch. The info in the crashinfo file pointed me to bug CSCso89550.
The workaround for this issue is to disable the gold diagnostics tool.
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