Cisco Switching/Routing :: Does Catalyst 3550 Support Inter Vlan Routing

Jul 24, 2007

Does Catalyst 3550 switch support inter vlan routing ?

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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
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 :: Nexus 5010 Support For Inter VLan Routing

Jan 10, 2012

Can nexus 5010 supports inter v lan routing , as there is no core switch and router available in current network.

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Cisco Switching/Routing :: Configure Inter-vlan On Catalyst 3750

Dec 20, 2012

My architecture is the same as show on the link with some difference.I use the router 1841 for inetrnet connexion instead of 7200VXR, this router 1841 is connected on the catalyst 3750 port G1/0/1.I use catalyst 2960 instead of catalyst 2950 or 2948.I use ASA 5510 for conexion on remote branche(I have 5 remote site), This ASA is connected on the catalyst 3750 port G1/0/37
Result of the test:

-I can ping devices in the same Vlans
-I can ping devices in different VLANs
-I can ping all device from the catalyst 3750
I cannot ping the router 1841 or ASA 5510 from the any devices (computer)The gateway of each computer is the correpondant VLAN IP address configured on the catalyst 3750.Why I cannot ping the router 1841 or ASA 5510 from the any devices (computer)

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Cisco Switching/Routing :: Manipulating VLAN Quickly On Catalyst 3550

Dec 12, 2011

I am attempting to create a mass upgrade server for some of our more standardized equipment since our vender cannot upgrade them pre-shipping for us, we've got to do them on our own. This means using a terribly organized wizard written in what appears to be Java...
I have an aversion to Windows and felt that I could accomplish the same thing using expect scripts and a Gentoo Linux server; now all I need is to set my Cisco 3550 (c3550-ipservicesk9-mz.122-44.SE6.bin) to have each port on it's own VLAN, except for fa0/1 which will be a trunk port to communicate with all ports as well as the server.

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Cisco Switching/Routing :: Inter VLAN Routing On N5548P Without L3 Daughter Cards

Jun 1, 2013

I have a DC topology based on 2 layers, access and aggregation, based on 2 pairs of N5548Ps, both without L3 Daugher Cards. My intent is to use the aggregation N5K pair as L3 inter VLAN layer, so I configured all the VLAN default GWs there. The 2 layers are interconnected via vPC, in a double-sided vPC topology for some N2Ks and some vSwitches. The point is that, despite connecitivity is working fairly ok, for some applications, like file transfer via either FTP or HTTP, between hosts in different VLANs, the performance is too poor. The file transfer starts ok, but after a while it becomes lower and lower. ICMP is working, but I can see some strange random behaviour, like having some packets taking more that 20 ms (sometimes 40 or more), whilst average is 2 ms.

I read through some articles saying that until you don´t have the L3 license (the one coming with L3 Daughter Cards) you can expect some weird behaviour on L3 level. Is that true?. What can I do apart of purchasing L3 Daughter Cards?. Can I enable L3 Basic license at the moment (I don´t need dynamic routing for now).
Here some excerpts of what I´m saying:
PING results:
10000 packets transmitted, 10000 packets received, 0.00% packet loss
round-trip min/avg/max = 0.809/2.496/57.559 ms
 System version: 5.0(3)N2(1)
License and features on the N5Ks:
switch# sho license usage
Feature                      Ins  Lic   Status Expiry Date Comments
FCOE_NPV_PKG                  No    -   Unused             -
FM_SERVER_PKG                 No    -   Unused             -
ENTERPRISE_PKG                No    -   Unused             -


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Cisco Switching/Routing :: 5505 Inter-vlan Routing With Multiple Gateways

Feb 15, 2013

We have two Cisco 5505 firewalls connecting to two ISP's . The two internal LAN's on the firewalls are & We also have a Cisco C3560x layer3 switch with vlan interfaces 184.3 & 186.3. We have two DGS-3100 Dlink layer 2 switches connecting our users to the Layer 3. Ip routing is enabled for intervlan communication & I can reach the Switch interfaces & firewall gateways from machines on both on the vlans.We have pbr enabled on the 3560 & users only on the .186 network can get to the internet. The switch is running the ipservices license & the sdm template is "desktop routing" .

Users on the .184 cannot access the internet but we can ping the layer3 interface & the firewall gateway. [code]

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Cisco Switching/Routing :: 3750 Inter Vlan Routing Configuration

Mar 24, 2013

In 3750 switch,I have configured intervlan routing.I have three vlans Vlan 10,vlan 20,Vlan 30 and I have assigned IP address for that Vlan.In vlan 10,I have connected one systen gigabitethernet 0/1 interface.From my system I am able to ping vlan 10 ip address but I can't able to ping other vlan ip address (vlan 20,vlan 30).Is it possible to up the protocol for all that time.

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Cisco Switching/Routing :: Inter-VLAN Routing Using 877 And SG300-10 Switch

Feb 5, 2012

I recently set up a small photography business and am trying to get a Cisco 877 and Cisco SG300-10 switch to talk to each other.
What I want is for the Cisco 877 to handle the internet and the SG300-10 to handle the local network,
I have set up 2 vlans in trunk mode on the switch and want vlan2 to manage local traffic and vlan3 to handle the internet.
I have got the 877 connecting to the internet what I dont have, traffic going to vlan2 on the switch from the 877
Look at the running configs for the switch and the router and tell me how to get the vlan on the router to pass traffic to the switch. In a nutshell I am inserting the internet into the switch but am not sure how to progress. I have the c870-advipservicesk9 image file on the router. 

Switch Config
interface  gi2
description connection-to-data-vlan
interface  gi3
description connection-to-internet-vlan
vlan database (code )

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Cisco Switching/Routing :: ASA 5520 / Preventing Inter VLAN Routing?

Mar 28, 2013

I am working for a large campus network. The network has more than 70 VLANS in a Layer 3 Switch(Catalyst 4503). Customer wants to stop intervlan routing between all vlans except 2 vlans. How will i do that? I have also a Firewall (ASA 5520) & a Router (2811) in up of the switch. Besides this, I have run HSRP in Layer 3 Switches for will i stop intervlan routing between VLANS except 2, with ACL or any other process has?

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Cisco Switching/Routing :: 6500 / Restricting Inter-VLAN Routing?

May 9, 2013

I'm looking to restrict Inter-VLAN routing through L3 switch (cisco 6500) and wanted to know best possible way to do it. I used VACL and achieved success to some extent, but my config is making clients take up to 5-6 mins to authenticate IP address from the DNS (bootps).My VACL config was as follows:
Subnet to restrict is (VLAN 15)
 STEP 1: Created extended ACL to allow bootpc/bootps through DNS
ip access-list extended EACL_DNS
permit udp any eq bootps any
permit udp any eq bootpc any
STEP 2: Created standard ACLs to allow only relevant subnet, server VLANs & some IPs from other subnets for printers/scanners etc.

ip access-list standard SACL_VLAN_15
permit (the subnet I'm restricting)
permit (server VLANs)
permit (printer in another VLAN which has to have access in VLAN 15)
STEP 3: Created VLAN access list

vlan access-map VACL_15 10
match ip address EACL_DNS
action forward
 vlan access-map VACL_15 20
match ip address SACL_15
action forward
STEP 4: Applying VLAN Access list on VLAN 15 vlan filter VACL_15 vlan-list 15 Though the above works, below is noted:

1. I'm still able to PING (the switch virtual interface) from outside the subnet, which I don't intend to do so. Howeve all cients in the subnet have no connectivity from outside the VLAN 15.
2. As mentioned its taking quiet some time to negotiate with the DNS server at system boot time.

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Cisco Switching/Routing :: Nexus 7010 - Inter-VLAN Routing On Multilayer VPC Environment

Feb 16, 2011

you find attached my network architecture with 2 Nexus 7010 on core layer and 2 Nexus 5020 on distribution layer, each one with 1 N2148T fabric extender switch. PC-A1 and PC-A2 are connected to one N2148T, PC-B1 is connected to the other N2148T. Nexus-7000-1 is HSRP Active for all VLANs, Nexus-7000-2 is HSRP standby. PC-A1 and PC-A2 are connected to VLAN A, PC-B1 is connected to VLAN B. PC-A1 and PC-A2 have the same default gateway correspondent to IP HSRP on VLAN A. It happens that PC-A1 is able to ping PC-B1 while PC-A2 is unable to ping PC-B1. If I issue a traceroute from PC-A2 I see Nexus-7000-2’s physical IP address as the first hop even if Nexus-7000-2 is HSRP standby. After the first hop the traceroute is lost. If I shutdown Port-channel 20 on Nexus-5000-2, PC-A2 starts to ping PC-B1.I can’t understand what’s wrong in this architecture.

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Cisco Switching/Routing :: 2821 Inter-Vlan Routing And IP NAT To ISP?

Jun 25, 2012

I have just bought myself a Cisco 2821 ISR.At present in my home I have a Cisco 2621XM. Fast Ethernet 0/0 is connected to a 3524XL as a trunk to provide my LAN with inter-vlan routing. it works great. Fast Ethernet 0/1 is connected to my ISP's cable modem and uses the command "Ip address dhcp" to get an IP and all other info from my ISP.FA 0/1 is Ip nat outside and the FA 0/0 and all sub interface like 0/0.1 .24 .168 etc all ip nat inside.I get intervlan routing and access to the internet via this router.I have this 2821 to replace the 2621XM as I plan to run CME on it and want gigabit routing on my vlans as at the moment on the 2621 routing between vlans it at half duplex or seems to be.I have configured the 2821 to ip nat outside on  gig 0/0 and ip nat inside on gig 0/1 and all of the sub interfaces (same setup as my 2621 but with gig ethernet)I have no access to the internet at all but I can ping and other domain names from the terminal session when I am connected to the 2821 via the console or telnet/SSH. the gig 0/0 has an IP assigned from my ISP too but no other nodes on the network can ping outside.Am I missing something here? the version of IOS is V 15.
My access list goes someting like
access-list 1 permit
access-list 1 permit
access-list 100 permit ip any
access-list 100 permit ip any
 and so on
I still cannot access the internet.....

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Cisco Switching/Routing :: SG 300-28 How To Prevent Inter VLAN Routing

Mar 18, 2013

I have a SG 300-28 switch with the latest firmware installed running in Layer 3 mode.
I configured this router with 4 VLAN's where VLAN 1 is connected to the network router. All VLAN's call all communitcate with one another. How do I go about configuring VLAN's so that they can only communicate with the router and the internet and not each other?             

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Cisco Switching/Routing :: Inter-Vlan Routing With 2851

Nov 27, 2012

I have one cisco 3750G-48 switch, one cisco 3560G-PS switch, Cisco UC520, cisco 2851 and cisco wireless access point.i have setup up intervlan routing between the two cisco switches and the uc520 with a total of four VLANS, the problem i'm having is with the 2851 router, I have created a trunk between the 3750 switch and the 2851 router. should I create subinterfaces on the 2851 router for the four vlans by doing gigabieethernet 0/0.1, 0/0.100 and so on or should I create BVI subinterfaces.
reason I ask is I created four vlans on the vtp server switch which is the 3750 and I connected the uc520 to the 3750 switch via a trunk interface and set up vtp client on the uc520, after I setup p the vtp on the uc520 the vlans were automatically created on the uc520 with each vlan having its own BVI interface.
So I am not sure how to configure the 2851 router to interact with the four vlans. also the 2851 router have two hwic 1adsl wics installed which will have two adsl connections coming to set up the 2851.

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Cisco Switching/Routing :: WS-C2960S Inter VLAN Routing

Dec 9, 2012

I am looking for a reasonable switch but it has do do inter-VLAN Routing. I know I could go with a 3560/3750 with IP Services but I am also thinking the 2960S with IP Base IOS might do?
I have looked up the IP Base IOS and it does list IP Routing but how to actually configure inter-VLAN Routing on a 2960S with IP Base?

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Cisco Switching/Routing :: VLan Routing Same Switch 3550-12T?

Mar 10, 2013

I'm having some problems setting up vlans to talk to each other on a 3550-12T switch. Its quite a simple setup I have, but I need to split my network up.
Currently I have a network of I want to create a new vlan network of So I have configured my vlan1 (default vlan) to have an ip of for getting to the management page
I have created a vlan2 of ?I have a port 10 linked to one of my 3560G's?In port 9 which is on vlan2 I have my pc plugged in with a static ip of from the router I can ping any device on 192.168.25.x.
I can not ping (which is my vlan2) nor can i ping the PC.
I have enabled ip routing  But I dont have a default route, this is becase we don't have a router on the network.

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Cisco Switching/Routing :: Catalyst 3550 PoE 802.3af Compliance?

Jan 5, 2012

confirm whether the Catalyst 3550 with IOS Rel. 12.2(44)SE is compliant with POE IEEE 802.3af?   I see some conflicting informaiton on Cisco's web site. Before Release 12.1(22)EA2, Catalyst 3550 PoE-capable switches (without intelligent power management support) caused high-power powered devices that supported intelligent power management to operate in low-power mode. Devices in low-power mode are not fully functional.
IEEE 802.3af—The major features of this standard are powered-device discovery, power administration, disconnect detection, and optional powered-device power classification. For more information, see the standard.

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Cisco Switching/Routing :: 3560 - Inter-VLAN Filtering

Apr 19, 2012

Probably an easy fix but something's weird in my config. I am setting up a new network, so this is not production, Routed environment, down to the access layer using 3560-x l3 switches.
vlan 10: data
vlan 20: wifi
vlan 30: wifi guests
vlan 40: voip
My objective is to allow all traffic OUTBOUND to certain subnets (,, and block any other networks. By doing it this way, after blocking all other internal traffic, I allow everything else to ensure internet traffic can go out.

Extended IP access list VLAN10_TRAFFIC_FLOW    10 permit ip any    20 permit ip any    30 permit ip any    40 permit ip any    50 deny ip any (5 matches)    60 deny ip any    70 permit ip any any!interface Vlan10description DATAip address access-group VLAN10_TRAFFIC_FLOW outendThe problem is, from the above info, when I ping from a workstation in VLAN 10, it should match rule 10, but instead if matches rule 50 (as shown by the 5 matches)

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Cisco Switching/Routing :: SG300 Inter Vlan Default Route

Sep 23, 2012

I just got my Cisco SG300 28, but I have some problems getting the routing to work. I get the vlans to get to the router, with the default route. But not getting them to talk with each other. I can ping the IPs from the cisco, but I am not getting traffic to go from vlan 1 to vlan 2. When I try to google, it say that it should do it automatically, and I found no setting for it. It looks like it not creating any route for the interfaces.

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Cisco Switching/Routing :: ASA5505 - Pinging From Computer Inter VLan

Feb 2, 2012

I'm having an issue routing between vlans. I have vlan 1, and 2. I want to ping something on vlan 2, from vlan 1. I cannot ping from a computer on vlan 1 to a computer on vlan 2. I can ping each computer from the ASA 5505. I get an error on the ASA when I try to ping from the computers. The error is Failed to locate egress interface for UDP from voice: to I can't understand why it even mentions IP 192.168. 1.200/ 137... I reset the unit configuring it from scratch and still no go. I have no given a static route to the out yet.. I need to get inter-vlan routing working first. [code]

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Cisco Switching/Routing :: Configure Inter Vlan On 3750 Series?

Jun 25, 2012

I have 3750 series with GIBICs ports I want to create 10 vlans with its sub-net and enable all vlans to access internet.

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Cisco Switching/Routing :: Catalyst 3550 Switch - Dynamic QoS Setup

Mar 28, 2012

I live in a condo building that uses 3 Cisco Catalyst 3550 switches connected to a Comcast router with 100 Mbps download. Currently we regulate bandwidth by providing each user with 3 Mbps download. Even if only two people are active they still only get 3 Mbps download. I would like to set it up so if two people are using they each get 50 Mbps; a sort of 'dynamic qos. Is this possible with these switches? Would we have to purchase a Cisco router in order to provide this feature?

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Cisco Switching/Routing :: Catalyst 3550 With WS-G5482 Gigabit Adapter

Oct 25, 2011

I can assign IP addresses to any of the 24 FastEthernet ports (it is a 24 port switch!). However, I have fitted the WS-G5482 Gigabit adaptor to give me Gig ethernet capability. It does not seem to be possible to assign an IP address to the adaptor.I realise that as it is an 'add on module' (well, a plug in module) this is different to the 24 port in the 'body' of the switch. I also have read that these Gig adaptors will only connect to other Gig adaptors (I found that out by trial and error, and then confirmed it by searching here).it's not possible to assign an IP addy to one of the plug in modules; it is not a big deal but I am planning to assign some IP addresses for remote management etc. I was going to use the Gig port for this but it may not be possible.
AH PS I am using the switch and connecting to the internet via the Gig adaptor, then out from one of the fastethernet ports to another little switch and then on to a router and out to the internet, so the switch and the plug in module are working fine.

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Cisco Switching/Routing :: Catalyst 3550 / IOS Naming Format Conversion

Jun 11, 2012

correlates the older IOS format naming compared with the newer? I have an older catalyst 3550 that might need an IOS upgrade due to us starting to implement dot1x. The reason that I say this is that some of the commands in the dot1x config guide, such as aaa accounting dot1x, are not valid on this platform. The current IOS is c3550-i5q3l2-mz.121-8.EA1c but the newer format is the ipbase, ipservices, etc. format. There is a newer ios but how do I convert from one to the other? I think I need to research the IOS to see if the new commands are there as well as I want to make sure there are no gotchas from a hardware standpoint if I upgrade.
Cisco Internetwork Operating System Software IOS (tm) C3550 Software (C3550-I5Q3L2-M), Version 12.1(8)EA1c, RELEASE SOFTWARE (fc1)Copyright (c) 1986-2002 by cisco Systems, Inc.Compiled Fri 15-Feb-02 10:50 by antoninoImage text-base: 0x00003000, data-base: 0x006675E0
ROM: Bootstrap program is C3550 boot loader
ACSTMElab-3550 uptime is 20 minutesSystem returned to ROM by power-onSystem image file is "flash:c3550-i5q3l2-mz.121-8.EA1c/c3550-i5q3l2-mz.121-8.EA1c.bin"
cisco WS-C3550-24 (PowerPC) processor (revision C0) with 65526K/8192K bytes of memory.Processor board ID CHK0615V0BPLast reset from warm-resetBridging software.Running Layer2/3 Switching Image


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Cisco Switching/Routing :: Catalyst 3550 Screen Not Allow To Enter Telnet

Mar 7, 2013

I have a catalyst 3550 and will be using it to run my cisco 7940 and 7960 ip phones with POE. When I plug the phones into the switch they power up just fine but the phones will not dial out as they have little x's by the line. I have also tried going through the set up of the 3550 but get stuck in one place. When I go to the, the screen will not allow me to enter the telnet page or allow me to enter any information. In the manual it shows a pic of what the screen should look like when I go to, but I am getting an entirely different page.

What I need to do to get everything set up correctly?

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Cisco Switching/Routing :: Route-map Command Support On Switch 3550?

Sep 30, 2012

I have cisco switch 3550 IOS Version 12.1(19)EA1c.   
I can configure route-map commands on that.  but i can not apply that into any vlan interface.   while i try to apply the following command ( ip policy route-map PBR) on VLAN int i get an error msg saying that the command is not recognized.

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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 :: Determine VLAN Tagging On A 3550?

Jun 13, 2013

We are trying to replace the CSS between our firewall and DMZ with a BigIP.  Among it's other functions, it will act as the router between the firewall and the DMZ. To make this work, I need to assign vlan tags values for the vlans I create on the BigIP box and these must match the tags on the cisco switches (3550's)  How do I find this information on the switch?

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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 :: ARP Broadcasts Not Reaching All VLAN Ports On 3550

May 17, 2013

ARP broadcasts not reaching all VLAN ports on 3550

Cisco 3550, interface Vlan9
ip address secondary
ip address


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Cisco Switching/Routing :: Changing Native Vlan On 3550 Switch

Dec 22, 2012

I am having trouble after creating a management vlan (99) on a 3550 switch.I have configured the vlan (99) and given it an IP ( and a default gateway (my router address - can ping to the switch from a PC and vice versa. The management VLAN IP is fine but now I cannot ping to the router from either the PC or the switch.It seems that just by adding VLAN 99 with it's own IP address has now prevented pings from the switch/ PC to the router ?Due to the fact that I have created a new switch management VLAN with an IP, does this mean I have set up the router as a 'router on a stick' scenario ? [code]

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