Cisco Switching/Routing :: Feature Request For 3750s And Other Stackable Switches?
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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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 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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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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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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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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Jan 27, 2013
Here's what I'm trying to do. We are having new storage servers installed that will be using NFS. I'm being told that they need to have their connections port channeled. Right now, the servers have connections to 2 different 3750s for HA. Is it possible to configure a port channel between these 2 connections?
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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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Jan 19, 2012
At this moment (firmware 1.0.3.5) the router has no IPv6 firewall and therefore when used in a typical dual stack IPv4/IPv6 network it has no protection regarding IPv6 traffic. Hopefully this will be fixed with a firmware update before the World IPv6 Day on the 6th of June 2012.
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May 23, 2012
MAC Support: 16000
Backplane: 18Gbps
Forward: 28Gbps
VLAN's: 4000 (q-in-q support)
Jumbo Frame Supported
Supported 8000 static routing
!Supporting Stack!
Cisco 4948 supporting stackable? which product do you recommend to these criteria?
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Jan 2, 2012
If we have 3 stacked 3750s# running Layer 3. Do we need license for every switch? or is it one license for the 3 switches? Also is the license associated with the MAC address of a specific switch? What i# am trying to know also, is if we have to install one license and it is associated# with one MAC and this switch failed.. will the Layer 3 be broken?
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Mar 8, 2011
I realize that this is a new product, but nevertheless I have some feedback after running my 4 new DCS-930L camera over the past few days.
Currently, you can configure the camera to EMAIL/FTP images on a schedule or when motion is detected, but not both.
Why does it matter? Because I get flooded with email alerts after I get home from work and later in the evening every time I walk by one of the cameras or whenever a light switch is turned on/off.
If I could configured the motion detection to only alert during a specified schedule of days and hours, it would be great!
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Feb 2, 2012
Would like to know if the Cisco Catalyst 4900M Switches are stackable?
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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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Sep 5, 2012
I've got LACP-enabled port-channels between a Cisco 3750 stack and a few different switches (some Cisco 3750s and some Juniper EX2200s). The Ciscos are all sending slow LACP updates, the Junipers are sending fast LACP updates (but the Cisco they connect with is responding with slow LACP updates).
I have a couple of questions:
1) what are the pros and cons of slow vs fast updates? my research has led me to the conclusion that fast updates are better for network resiliency as long as you have plenty of bandwidth overhead (which I do at the moment). is there anything to add to this conclusion?
2) is there any way to configure the Cisco 3750s for fast updates?
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Jan 10, 2013
We've recently inherited a platform with little handover and also minimal networking experience.We're going 100 miles an hour in learning, but I'm a bit confused with the idea of a L2 switch with no IP assignments to ports, so using VLANs, and a L3 switch with IP assignments. And the combination of both.We have 2 Cisco 3750 switches, along with a whole host of other hardware, so we're starting at this "gateway" to start breaking things down.
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Jan 30, 2012
I've read the document (Document ID: 91672) on setting up WoL, but I had a few questions as this doesn't completely fit our situation.We have 4 3560 switches, 3 have only access to vlan 1, SW4 has access to vlan 1 and vlan 2, every switch is connected by fiber to a 3750.We want to enable every server/PC on vlan 2 to allow WoL packets to all PC's on the internal network (so WoL through all 5 switches). In the above document, it allows WoL to be executed only from a single IP/Server, is it possible to allow an entire vlan to execute WoL? or allow multiple IP's to execute WoL? Also, in the switch configuration it says to type
-"switchport mode access"
-"switchport access vlan4"
-"spanning-tree portfast"
We do not use STP and is disabled, is portfast required for WoL use? if Port Fast is disabled by default, could this also be blocking a WoL packet from vlan2 to vlan1 on the same switch?
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Dec 8, 2012
I've to enable it on 3750 and nexus 7K switches. what are the steps involved? can we enable jumbo frame per port instead of enabling globally? i.e. we will only have few ports that will be using jumbo frames, rest of the ports will be using default 1500 MTU size.
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Dec 7, 2011
I want to capture RPS related alarm on SNMP server for RPS2300 and cisco 3750d switch
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May 5, 2012
I have a network with static routes witch I need to convert to OSPF.Never used OSPF, and do not have much experience in routing in general.The netvork is connected via some fiber links, but moastly wireless bridges.I have attached a drawing of how the network is.Routers are 3550, 3560 and 3750s.Each router is on a different physical site.
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Feb 7, 2012
I have Nexus 5548UP, Version version 5.0(3)N2(2b), with a flat configured network. Customer has put several IP subnets on one Vlan. In one subnet is an Siemens SPS wich connects to a Server. This SPS is not reachable since I send a ping from the N5k, then everything works fine. Sniffering that port no arp requests from the N5k are captured. That hapens with every device (Siemens SPS) in the network. Every other clients and server are working fine and there are no problems.
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Oct 18, 2011
I am facing an isssues with 7609 for LAN switching , based on LAN (VRRP/HSRP) feature.Actually we are having ES+ cards (on 7609) and we are using multiple groups(say 350 vrrp groups) running on the router . the routers are connected as router 1>>> mux(which is working as switches)>>> router2
my questing are
1. does their will be "multicast packets" (for VRRP/HSRP group) "from backup router to Master router", when in stable state( ie when Master and backup are already chosen) , or the packet from backup to master should be unicast.I know for sure, the packet from master to back is multicast packets denstination to Multicast IP packet and To MAC address.I am not sure but I think from backup to master it should be multicast
2. what is frequency of these packets( from backup to master)
3. As i have multiper group on a single interface ( we are using q-in-q), when the connectivity from router's is broken, then does all the groups will muticast their active roll in the lan sengment "at once" or it will be in a groups say 100 groups at once, and after few ms few 100's and sone ( as is on OSPF or RIP)
we are in between troubleshooting I hope we get the ans( Actul problem we are seeing in the router's that we have 2 ports on active routers and 2 ports on standby router , but we are not seeing muticast on 1 port on standby router where as all other 3 ports are seeing multicast packets) [code]
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Nov 20, 2012
Nexus Core switch 7K Gives arp request for his own Local IP address continuously. This Logs keeps on coming for the past 2 months.
The Ip Address 10.80.18.1 is an secondary IP address of vlan 18 , which is used for Teleprescence.
interface Vlan18 no shutdown no ip redirects ip address 10.80.18.252/24 hsrp version 2 hsrp 18 preempt priority 110 timers 1 3 ip 10.80.18.1 secondary ip 10.80.18.254
2012 Nov 12 18:22:06 FRMA_BK1_CSN7K_01-COR %ARP-3-REQ_IP: arp [3829] Sending A
RP request for local IP address 10.80.18.1 on Vlan18, request from pid: 3834
2012 Nov 12 18:22:07 FRMA_BK1_CSN7K_01-COR %ARP-3-INVAL_HDR: arp [3829] Found
[code]....
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Feb 3, 2013
one of our switches (WS-C2960G-24TC-L). When I try to turn on the lanbase-routing feature using sdm prefer lanbase-routing, it gives me an error (Unknown command). I tried "sdm prefer ?", and lanbase-routing wasn't there (only qos, default and dual IPv4 & IPv6). The switch is running on image C2960-LANBASEK9-M version 12.2(50)SE5.We have another switch (WS-C2960S-24TS-L), running on image C2960S-UNIVERSALK9-M version 12.2(55)SE5, and I can enable lanbase-routing feature. If I upgrade the WS-C2960G-24TC-L to version 12.2(55)SE5, will it be able to do inter-vlan routing? Or is the switch itself totally limited to VLAN configuration only?
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May 22, 2013
I have a query regarding attached Network Design
PC---2960---3750(One Routed Port and All Switched Port)------------------------ 3750(One Routed Port and All Switched Port)-----2960------Internet
I have many Vlans on left side of image , Right Side of Image is having internet connection via Modem, and local connectivity between VLAN works fine but Other Vlans Except Vlan1 is able to Access Internet.Note that 3750X did not have NAT Feature ,How should I able to get Internet on Other Vlans (10,20)
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Dec 15, 2011
I have a situation where a specific unit on my network is booting using BOOTP.The unit is connected to a stack of two Cat3750X switches running IOS 12.2(55)SE1. The server and client is on the same VLAN on the same physical switch, so it is purely L2 between the server and client. The BOOTP server is a computer running a specific software connected to the switch. There is no DHCP server on the switch. IP-helper is not configured on the switch.
If I do a monitor-session on the client port I can see the BOOTP request packet enter the switch, however this packet is never flooded out of any ports in the switch, so the BOOTP server never receives the request. I have tested the server and client in a cheap dumb switch and there it is working just fine. Regular DHCP requests are flooded correctly.It apprs the there is something in the clients BOOTP request that is not correct, since the Cisco switch apparently discards the packet.
Are there any BOOTP gurus that can have a look on the attached (Wireshark) BOOTP client request and perhaps determine if it is infact malformed? Why the switch is not flooding the packet. What is the meaning of the BOOTP broadcast flag in a client boot request?
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Feb 22, 2013
Version 12.2(33)SXI
int vlan 1
description client vlan
ip vrf forwarding A
ip address 10.1.1.1 255.255.255.0
standby 129 ip 10.1.1.2
standby 129 timers 1 4
standby 129 priority 105
standby 129 preempt
ip helper-address 10.1.2.20
[code]....
dhcp requests are not making it to the dhcp server SAME VRF (ip helper-addres is not doing anything.....)extended vrf traceroutes on udp 67 sourced from vlan2 are fine
I am expecting udp unicast packets on port 67 "giaddr" relay packets on the DHCP server generated and sourced by the relay on Vlan1
eg. Mar 1 01:59:06.731: DHCPD: setting giaddr to 10.1.1.1
This exact setup works in our preprod environment with the same code.Only difference is we run Distributed etherchannel on the 6500's where this doesnt work.
Wireshark on the client I can see the requests being sent Going to check it with debug ip dhcp server to check the relay logs out of production hours.
I have seen so many people say it IS and ISN'T supported on this version of the code.e.g. [URL]
I am aware the helper-adddress should inherit the vrf of the interface ip helper-address vrf command is not supported.The fact it works in the PP environment.... could this be due to the Distributed EtherChanel difference? or just some bug....
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Oct 26, 2011
I have been looking to find out the list of features that the IP Base IOS has for the 3750X series switch. What would be ideal is a comparable list but essentially I need to know which of the LAN Base/IP Base/IP Services has SSH functionality.
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Sep 9, 2012
Full feature set for IP Base with the 3750x.I just wanted to verify that I could create a routed port, turn ip routing on, and create static routes as well as a default route. From what I can find, there shouldn't be a problem with this on the IP Base Feature Set, I just wanted to verify. Or any link for the Features of IP Base on the 3750x.
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Jul 22, 2012
We are going to be rolling the 4500 switches out and I wanted to know more about how to use the wireshark featue. Any documentation on how to use this?
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