Cisco Switching/Routing :: Catalyst 3750 Having More Than 128 VLans

Feb 18, 2012

Is is correct that vlan's exceeding 128 runs without spanning-tree.?

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Cisco :: Catalyst 3750 Configured For 3 Vlans

Mar 18, 2012

Im just starting to learn cisco, currently I already have a cisco catalyst 3750 configured for 3 vlans, and now im planning to have another 3750 for redundancy.

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Cisco Switching/Routing :: Multiple Vlans On Catalyst 2950?

Sep 13, 2012

I have a above said switch at my remote office (600KM) which is connected with L2 Point to Point leased line. Both the ends I have Cisco 3950 catalyst switches with Vlans configured at both the ends. Now, for obvious reasons I should remove the other end 3950 switch and replace with Cisco 2950 switch. The other end 3950 is having 4 Vlans configured on 4 ports. Now my requirement is, I should configure 3 Vlans (one for P2P, one for 10 Desktops and one for to bring traffic from other network).

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Cisco Switching/Routing :: Catalyst 2970 Switch For 2 Vlans

Oct 14, 2012

I am using a catalyst 2970 switch for 2 vlans. Corporate data and a separate VLAN for backups. What I want to do is create an LACP etherchannel to the switch and also trunk these ports so the server is part of both VLANS.Due to fact that some of these servers are on totally separated networks, they really shouldn't be able to talk to the backup server. Creating the VLAN for backups works to achieve this. I plan to create inbound ACLs on each port to allow only the ports and IPs for the backup network and allow everything we need for corporate data.I read somewhere that you can't have ACLs on an etherchannel and I just want to get it all straightened out. I notice I can't add an access group to the port-channel itself but I can on the port- channel member ports. Is this all I need to do or does this not work?

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Cisco Switching/Routing :: Integrating Catalyst 2960 With Juniper Core And VLans

Mar 7, 2012

I've just started a new job after a couple of years not touching cisco gear and been pitched in... My new employer has a network that's Juniper based. We've inherited a load of Cisco switches as part of the deal for hosting matches during the Rugby world cup (plus a load of Aruba wireless gear that promises to be my very own special millstone, but that's bye the bye.)
 
My task is to hang these catalyst 2960's onto our existing infrastructure via fibre connections.
 
On the Juniper switch, there are four vlans being pushed to the port the cisco's hooked into: Code...

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Cisco Switching/Routing :: Multiples VLANs On 3750

Jan 24, 2012

I have a stacked Cisco Catalyst 3750 configuration that currently has one V LAN configured. VLAN 192 - 10.192.0.0/16
 
The Catalyst has an ip on this range of 10.192.0.1. I would like to configured a few more V LAN's to be able to run some more network ranges through this device. Would it be a case of just adding the V LAN's to the master and then configuring an IP for each V LAN within the inter-v lan routing section? Some V LAN's will require access to each other but not all.

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Cisco Switching/Routing :: Created Load Balancing Between Two Catalyst 3550 On Couple Of Vlans

Feb 24, 2012

I am testing on lab equipment (2 Catalyst 3550 and 1 Catalyst 3560) HSRP version 1 and 2.I successfully created a load balancing between the two Catalyst 3550 on a couple of vlans (11 and 12) on ver 1
 
now, just adding the command "standby xx version 2" my hosts on the 2 vlans are completely unable to ping the virtual IP def. gw on debugging i checked that msgs are exchangedthe two cat 3550 are seeing each other on HSRP (active / standby roles)the real ip addresses are pingable rebooted the swiches (just as a last resort try)deleted arp chache on hostsremoved the auth on hsrp  all of this no effect.
 
i also tried to modify the priority on the cat 3560 (before he was on both vlans in standby) to make it the active one and with the same config it worked flawlessly.
 
My only idea is that there is a bug on CATs 3550 (IOS: c3550-ipservicesk9-mz.122-55.SE4.bin) [code]

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Cisco Switching/Routing :: 3750 - Transparent Firewall Between VLANs

Jun 19, 2012

I have to put an ACL Firewall in front of a public IP range.There's no routing so I want to do it with a transparent layer 2 Firewall. I found this document which descibes exactly that feature I need: [URL]
 
It seems to be a feature introduced in IOS 12.3.
 
My Questions:
 
1.) is it possible use this transparent firewall feature with the 3750 Switch instead of a "normal" IOS-Based router?

2.) I've seen there is no IOS 12.3 for the 3750 but rather 12.2 (currently installed) or 15.0.1. Is this Feature included in 15.0.1?
 
If the feature described above is not available, is there any other way to achieve my goal?

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Cisco Switching/Routing :: 3750 - Setup A Switch Port For 2 Vlans

Nov 8, 2011

I'm trying to setup a port on a catalyst 3750 so it will pass traffic for 2 vlans. It connects to a (watchguard) firewall which I've configured with a primary IP (for vlan 27) and a secondary IP (for vlan 29).
 
However I can't seem to find the correct commands to enter on the cisco switch port (I've tried a variety).
 
FYI the current configuration is...
interface FastEthernet1/0/38
description ## Connection to WG vlan27 and vlan 29 ##
switchport trunk encapsulation dot1q

[Code].....

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Cisco Switching/Routing :: 3750 / 3500 - Separate Network Into 2 VLANs

Feb 13, 2012

Currently we have an Ava ya IP Office switch running on the same network as our PC clients. I would like to seperate the two network into 2 V LAN's.

We have a mixture of Catalyst 3750 switches and some older 3500 models.Where do I start? Should I leave the PC's and servers on the default V LAN and just move the IP handsets?

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Cisco Switching/Routing :: Create Different Policies For Vlans On 3750 Table

Jun 27, 2012

I am looking for a way to create different routing policies for vlans on a 3750 table.
  
My set up is 
 
Clients----------- 3750 -------------- ASA ---------------Servers
|
|
|
Internet Routers
 
What i am trying to do is on the 3750 to route private networks to my ASA on different subintefaces and all internet to my internet routers . Each VLAN has a different GW for the internet. On some case i have the ASA as a default gateway. ASA default default route is 3750 where i need the internet traffic to be spllited on the proper Boarder router.

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Cisco Switching/Routing :: 3750 - Configuring Multiple VLANs For Single Port

Apr 11, 2012

I would like to configure a 3750 switch port to be able to use two vlans. I know you can do this with a voice and data vlan, but what about two data vlans ? Say I have two devices, one on a 10 subnet and the other on a 172 subnet, but i only have one wall jack for both devices to plug into. So I use a mini switch to connect both devices and connect the switch to the wall jack; and of course this all leads back to one switch port. When I go to enter the switchport access vlan 172 cmd, how would I also make it so the device on the 10 subnet could route out ?

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Cisco Switching/Routing :: Router On A Stick 2811 With 3750 - Not Propagating VLANs

Jun 1, 2012

I am trying to configure router on a stick with 2811 and 3750, but I just cannot get it to work - vlans are not getting propagated from 3750 to 2811: 3750:
 
Code...

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Cisco Switching/Routing :: Catalyst 3750 Low On Memory

Jul 25, 2012

have 3 Catalyst 3750 in same stack, the IOS version is 12.2(53)SE2. Today we can not telnet/ssh to this switch, but ping is ok, and switch function is ok. I try to access the console port, it show "low on memory, try again later". After I reboot the master switch in the stack, the master switch change to another switch, then I can telnet/ssh to this switch. I check the Ciscoworks server syslog report, there are many MAC address flapping error message, and I beleive the MAC address flapping occured before several weeks. ( the G2/0/15 & G3/0/15 is connect to a VMware ESX server and the EtherChannel config mismatch with this Catalyst 3750 switch ) How to mention the root cause of the "low on memory" problem and what is the abnormal memory usage ( free memory percentage below ?% )?

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Cisco Switching/Routing :: Catalyst 3750 Won't Boot

Apr 9, 2013

my Catalyst 3750 switch. Following a power cut the switch no longer boots up. The SYST light flashed green but no POST checks are made. I cannot see any boot messages from the console port either. The switch was on a UPS but some thing may have damaged the switch.

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Cisco Switching/Routing :: Catalyst 3750 With Tacacs And Vrf

May 13, 2012

There is a requirement to configure tacacs and radius on catalyst 3750X (version 15.0) where two vrf exist.Is therer a solution to configure "tacacs-server,host x.x.x.x vrf yyy" ?? I know it is possible to configure under the "aaa group server radius xxx" the command "ip vrf forwarding yyy".Is there anything else for the tacacs-server and radius-server command?

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Cisco Switching/Routing :: Catalyst 3750 - Route To 2nd ISP

May 2, 2012

I have Catalyst 3750. and 2 ISPs
 
I wanted to use, let say on port5 of Catalyst 3750 only 2nd the ISP will route to this port.
 
The rest is pointed to the 1st ISP.
 
Im thinking of using VLAN..

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Cisco Switching/Routing :: Multiple VLAN Routing Tables For 3750 Catalyst

Oct 24, 2012

I have a network with a Catalyst 3750 as the main switch and then some Catalyst 2960 switches that are plugged in to that. I have a server running windows server 2008 with a couple of virtual machines running in Hyper-V. I created 4 VLANS listed below and gave the 3750 the following IP Address.I would like the 3750 to only be configurable from VLAN 40 but currently every VLAN can connect to it, I noticed in the standard web page settings there was a setting for "Management VLAN" but it was set to 1 and would not let me change it, I kinda assumed that was for the management port in the back.-Now the tricky part, I was trying to set up routing between the VLANs and so far I have only been able to get a sort of "all or nothing" routing to work. I can turn IP routing on and add two or more VLANs to the routing and it works fine. But what I was hoping to do is create a couple of "junction vlans" that would only route to one or two other vlans. For instance, I wanted to create a VLAN 100 that routed to VLAN 20 and 30 but nothing else. I also want to route VLAN 1 just to VLAN 30, and so on. I am able to do each one of the cases but only one, it seems like the switch only supports one "routing table" am I missing something or is this just a limitation of the switch?

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Cisco Switching/Routing :: Catalyst 3750 Multi-cast VLAN Routing

Oct 28, 2012

I have a network with several catalyst 2960 switches and one catalyst 3750. I have created two VLAN and set up the proper routing and everything is working fine there. I have a client/server application that used multicast in the initial start up for the client to determine available servers, the issue is one of my clients is on a different VLAN then the server. I am able to route the multicast using MVR as long as both the server and the client are plugged into the 3750 by creating a static route, making the server a source port and the client a receive port. Unfortunately I need the client and the server plugged in to different 2960s. My question is how do I establish multicast routing between the two and perferably do it dynamically (always route multicast traffic from one VLAN to another).

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Cisco Switching/Routing :: Inter-VLan Routing On Catalyst 3750 Switch

Dec 17, 2011

I have been looking into this for a while and I can't seem to figure out why my 2nd vlan is not able to connect properly to the net.
 
My switch has 12 ports where my devices connects directly, they are all on Vlan 1 and they all work perfectly. on Port 12 I have a dlink router that is connected to a cable modem. the dlink router has an Ip address of 192.168.0.20
 
I created a second vlan (vlan2) and enabled dhcp relay on it. then I assigned port 9 on the switch to  (vlan2)my laptop which is connected to port 9 seems to get an ip address fine and able to ping only some devices on my network (vlan1) and is not able to go out to the internet.  I think it has to do with the routes. [code]

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Cisco Switching/Routing :: About Intervlan Routing On Catalyst 3750 Switch

Apr 16, 2012

I have been looking into this for a while and I can't seem to figure out why my 2nd vlan is not able to connect properly to the net. My switch has 12 ports where my devices connects directly, they are all on Vlan 1 and they all work perfectly. on Port 12 I have a dlink router that is connected to a cable modem. the dlink router has an Ip address of 192.168.0.20,I created a second vlan (vlan2) and enabled dhcp relay on it. then I assigned port 9 on the switch to  (vlan2),my laptop which is connected to port 9 seems to get an ip address fine and able to ping only some devices on my network (vlan1) and is not able to,go out to the internet.

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Cisco Switching/Routing :: Software Adviser For Catalyst 3750

Oct 11, 2012

I was browsing the Software Adviser on Cisco's website to look for a suitable IOS image, for a 3750. The system displayed a couple of suggested IOSes. there was no mention of IOS 15.0SE version.Could the Software Advisor be not up to date with the current Catalyst IOS releases?

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Cisco Switching/Routing :: SPAN Configuration In Catalyst 3750

Dec 31, 2011

I have CISCO catalyst with VLANs (VLAN ID 33, 36, 40-53) configured. I need to configure port mirroring in Switch 3750 for NAC (Network Access Control).  I need to Monitor all the VLANs. Here is the SPAN configuration of switch: [code] Monitor session 1 source vlan 33 , 36 , 40 – 53.Monitor Session 1 destination interface fa 1/0/8  (here I am not able to set encapsulation dot1q ) because the error occurred saying %one or more dest port do not support the encapsulation%.

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Cisco Switching/Routing :: DHCP Server Catalyst 3750

May 28, 2013

I have customer who has as Core Switch one Cisco Catalyst 3750 with the IOS c3750-ipbase-mz.122-35.SE5.I know that this image support DHCP Server configuration, but I like to implementate new vlans (approx 15) and I want to know if this switch support 15 DHCP Servers.

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Cisco Switching/Routing :: Sg200 Lag Setup To Catalyst 3750?

May 27, 2013

How to setup a port channel between a SG200 and 3750 and am having problems.
 
What do I need to do on the SG200 I have added the port into the lag but the port will not come up.
 
I spent half a day messing arround with the web interface and I am unable to get the port to come up.
 
The Cisco 3750 is a standard port channel config which I have setup maytime before. channel-group 1 mode active channel- protocl lacp Switchport mode trunk

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Cisco Switching/Routing :: How Many EtherChannels Supported In Catalyst 3750-E

Oct 13, 2012

I am working in an environment where i have to use more etherchannels, any way that how many etherchannels could we create on Cisco Switch 3750 e. do they can utilize high process resources of CPU.

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Cisco Switching/Routing :: Catalyst 3750 And 3750X Together In One Stack?

Nov 20, 2011

if I read the Datasheet of Catalyst 3750X-Series-Switches it is possible to connect a new X-Switch to an existing and old Catalyst 3750-Series Stack.What kind of requirements are needed? Only same IOS-Version in the hole Stack and if possible same Feature-Set? .... like in a normal NOT mixed Stack?

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Cisco Switching/Routing :: VLAN Bridge With Catalyst 3750

Nov 8, 2012

I have 3 VLANs here that need to be on the same network segment.  They are going to be used by our Wi-Fi network (with Aironet APs), bound to 3 different SSIDs (as Aironet APs doesnt allow multiple SSID per VLAN), each one with a different authentication method and server.Is there a way to bridge those VLANs together with a Catalyst 3750 switch?  I tryed configuring an IP address on one of the VLAN interfaces, then configuring a bridge with the vlan-bridge protocol (Catalyst 3750 doesnt have the "ieee" bridge protocol type) and put all 3 VLAN interfaces on the same bridge-group, but it didnt work (even with "bridge x route ip").I also tryed configuring IRB bridging, with the 3 VLAN interfaces on the same bridge-group and an IP address on the BVI interface (the way I used to do with old 2600 routers).  Same result.(actually, I didint test to see if the interfaces are actually being "bridged", but I see neither of them can reach the router)

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Cisco Switching/Routing :: LACP - SGE2000P To Catalyst 3750

Apr 24, 2012

Is it possible to configure LACP etherchannel to a Catalyst 3750?  Playing around with the SMB switches for the first time. 
 
I know how to do it on the 3750 but am having trouble figuring out the sge2000p. 

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Cisco Switching/Routing :: SFP-10G-ER Is Not Supported On Catalyst 3750-X And On Other Switches

Sep 23, 2010

SFP-10G-ER are not supported on Catalyst 3750-X and on other switches ....
 
%PHY-4-SFP_NOT_SUPPORTED: The SFP in Gi1/1/1 is not supported
 
Why ?When will ER be supported ?

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Cisco Switching/Routing :: Connect SF302-08P To Catalyst 3750

May 7, 2012

I am trying to use a SF302-08P switch to connect a conference phone (Cisco 7937) to my infrastructure.  I connected the G2 port on the SF302 to a Gig copper port on the Catalyst.  I configured both ports as trunked ports and port e1 on the SF302 as an access port for the phone.  VLAN 1 is the default VLAN and VLAN 10 for voice.  However, the phone does not connect to the Call Manager.  I have changed the configurations on the G2 trunked port and the ethernet port (trunked ports, general ports, tagged and untagged).  I have also changed the configuration on the Ethernet port (general, access, trunk, set it on the default VLAN, in the voice VLAN, etc.)  The SF302 connects to the Catalyst, and PCs connect OK. 

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Cisco Switching/Routing :: Auto-QoS On Catalyst 3750 LAN Switches?

Aug 12, 2012

why the AutoQoS macro does not implement "priority-queue out" when configured on the 3750 platform running certain versions of software. The only other platform I have experience with AutoQos is on the 4500 and it enables priority queuing as expected. So what's up with autoqos on the 3750 on version 12.2(35)SE5?
 
When it comes to configuring QoS on campus user/phone access ports there are some important settings that can and should be considered but one can argue that enabling the priority queue is the single most impactful or important command. So I was very surprised and concerned when I didn't see priority-queue out. Cisco describes AutoQoS as a simple, quick way of deploying QoS on the LAN and it precludes you from having to learn all of the differences between hardware platforms. But is it true that this tool produces an incomplete config solution? Let me know if I am missing something.
 
Here is an example of what AutoQoS produces when applied to a 4507 with WS-X4648-RJ45V+E:(other interface commands are left out for simplicity)
 
interface GigabitEthernet5/25description XYZ
switchport mode accessauto qos voip cisco-phoneqos trust device cisco-phoneservice-policy input AutoQos-VoIP-Input-Cos-Policyservice-policy output AutoQos-VoIP-Output-Policy
 policy-map AutoQos-VoIP-Output-Policy
class AutoQos-VoIP-Bearer-QosGroup
set dscp ef

[code]......
 
Here is an example of what AutoQoS produces when applied to a 3750 running version 12.2.(35)SE5: (no priority-queue out)
 
interface GigabitEthernet1/0/36
switchport access vlan 8
switchport mode access
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0

[code]......

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Cisco Switching/Routing :: Catalyst 3750 Failover Configuration

Jul 16, 2012

Our servers are hosted at the Main site, site office A access to the Main site for Internet and servers. We are thinking NextG to take over when the link between sites goes down.
 
To start with, what is the configuration for 3750 at Site A and the Main site:

1) Trunking for both switches

2) Routing

3) the automatic failover configuration for the switch at Site A.

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