Cisco Switching/Routing :: 3550 - IP Routing In L3 Capable Switches?

Apr 11, 2012

Is L3 ip routing on by default in 3550s?  If so is the "ip routing" command visible in the config file?  If no - I assume that one would enable L3 routing with that config command.In general terms are there any IOS devices where ip routing is enabled and one would not see the "ip routing" command in config.  I.E. if that command is not visible in the config could you assume there is no L3 capablity in that device?

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Cisco Switching/Routing :: Cat6509 Switches With VSS Capable Sups

Nov 24, 2011

I currently have 2 Cat6509 switches with VSS Capable Sups. One of the switches has an extra 10Gig Lincard. Will VSS still work in this scenerio?/?

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Cisco Switching/Routing :: 3560 - Switches Capable Of 10GB Port Density

Feb 5, 2013

I have 3560's in my current environment, operating in the core/distro/access layers. The switches are in a star configuration, performs only layer 2 switching, and utilizes copper (no plans on moving to fiber).
With a fairly limited budget, I've been contemplating on upgrading the central node to a stacked 3750X to eliminate that single point of failure, and trunk the rest of the 3560's to the stacked switch. I wanted to be sure that the 3750X switches will be right for my environment (90-100 hosts), and if what I explained above is a good solution.
I'm also looking like to upgrade 6-7 of my servers (and SAN) with 10GB network cards. Do the ports on the 3750X have port densities capable of 10GB? If not, what switches provide that capability?

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Cisco Switching/Routing :: WS-C2960S-48TS-L / Reasons To Limit 1Gb Capable Switches To 100Mb?

Jul 8, 2012

Our network administrator restricts all our new 1Gb switches to only 100Mb, to which he claims it will increase overall performance. Preventing devices from bottlenecking the network. (that is, only restricting the main switch ports, not the uplinks)For example we have a new building with 2x WS-C2960S-48TS-L connected together with FlexJack and then a 1Gb Fiber connection back to our core switch.
This building is on it's own subnet and there is little broadcast traffic. I don't see the point other than it hinders the potential speed we could use. Labs are set up in this building and 1Gb is MUCH faster when it comes to imaging and software deployment.

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Cisco Switching/Routing :: To Stack 2 Switches 3550

May 15, 2013

I would like to know how to stack 2 switch cisco 3550 that IOS C3550-ipservicesk9-mz.122-44.SE6

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Cisco Switching/Routing :: 3550 TCL Interpreter In Switches

Jun 11, 2008

I have one 3550 switch and i upgraded from 12.1 to 12.2(44)SE . But "tclsh" command is not enabled on this version. As per Cisco, 12.2(25)S is enough to enable TCL interpreter.

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Cisco Switching/Routing :: Is 3750 SW Capable Of Handling Full Routing Tables

Oct 8, 2012

Is a 3750 sw capable of handling full routing tables and what can you recommend in a small mutihomed BGP router or switch capable of handling full routing tables?

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Cisco Switching/Routing :: 3550 / 3560 - Can Multiple Connection Between 2 Switches

Jul 9, 2012

For some special arrangement, I would like to connect 2 access ports from a 3550 switch to 3560 switch.1 port for vlan 200, another port for vlan 201.Will this introduce bad thing to the switches?

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Cisco Switching/Routing :: ASA 5520 - NAT Capable Device With High Throughput

Jan 26, 2012

I'll have to replace an old WS-C3550-24. Reasons for this: EOL/EOS & we'll need a NAT capable device...
As I understood, the only L3 catalyst that is able to perform NAT is a 6500? Is that correct? If the above is correct, it seems I can only replace the setup by using a router/ASA with a L2 switch. A router with high throughput (+/- 300Mbps) is hard to find, especially as NAT will require CPU resources...
So, my best (affordable price) solution is getting an ASA5520 (450Mbps FW throughput) and a L2 switch?

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Cisco Switching/Routing :: POE Switch Capable Of Powering 9971 / Cam And Think Client

Nov 4, 2011

Which smaller POE switch is capable of powering a 9971 IP phone with a cam and a think client attached?

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Cisco Switching/Routing :: 3550 / Routing Protocol Neighbor Between SVI And Routed Port?

Apr 18, 2012

I have a collapsed core design with routed ports between all components. Access layer switches, data center switches, core/aggregation. All routed (no spanning-tree at all).Now...I have to add an IBM BladeCenter with a BNT layer 3 switch to my topology. However, those nasties don't seem to support routed ports.How can I have a routed port on my cisco switch and a standard access port on the BNT and still establish an adjacency with an SVI? I am running OSPF, but I am labbing this in my home lab with 2 x 3550s and EIGRP.
On SW2:
*Mar  1 00:57:00.711: EIGRP: Received HELLO on Vlan100 nbr
*Mar  1 00:57:00.711:   AS 999, Flags 0x0, Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*Mar  1 00:57:02.303: EIGRP: Sending UPDATE on Vlan100 nbr, retry 9, RTO 5000 tid 0
*Mar  1 00:57:02.303:   AS 999, Flags 0x1, Seq 17/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1


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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 :: Configure Routing Between 2800 And 3550

Sep 18, 2012

The layer 2 switches are connected to layer 3 Switch via trunks, and routing between layer 2 switch ports with configured SVI's on 3550. All working fine. Now I'm trying to configure routing between 2800 and 3550, I tried connecting both Straight Throught and Crossover cables to the 2800 Fa0/0 and Fa0/1 ports as well as the switchports on 3550
No switchport commands are configured however, the lights do not go on for both straight through or crossover cables. I tried connecting 1750 routers but same result. My goal is to have all the VLANS routed to the internet with configuring NAT translation the router.

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Cisco Switching/Routing :: 3550 / Layer 3 Switch Not Routing?

Apr 26, 2012

I have a 3550 l3 switch configured as follows:

vlan 10 ports 1-10
vlan 21 ports 11-20
vlan 30 port 21-30
vlan 40 ports 31-40
default vlan should be vlan 21

I have the servers, switch and router connected to vlan 21.  Vlan 21 works great I can browse the internet, but I cannot ping any other vlans. router is connected to fa0/19
Building configuration... 
Current configuration : 4833 bytes
 version 12.2
 no service pad


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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 :: 2600 / 3550 - InterVLan Routing

Dec 2, 2011

I've been working with these two Cisco devices in my home off and on for several months now but I just can't take it anymore, I'm about to throw them away and go back to Linksys router.
I have a Cisco 2600 Router with only one Ethernet card in it so I have to trunk from my 3550 Switch to that device.  I'd like to have my ISP and all users plug into switch and all trunk back to the router's sub interfaces. Currently, I have started over...again, and am unable to simply get the router and switch to ping each other if I put sub-interfaces on the router.  See my configs:
2600 ROUTER:
Router#sho run
Building configuration...
Current configuration : 555 bytes

3550 SWITCH:
Switch#sho run
Building configuration...
Current configuration : 2302 bytes
version 12.2
Port F0/24 is in VLAN 1, as are all ports but Port F0/1 which is my desktop PC. I mocked it up in Packet Tracer and it works just fine.  This is just a simple setup and I'm making sure I can ping between switch and router before I move to each next step.

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Cisco Switching/Routing :: Catalyst 2960-48 - Capable Of Being Backbone Switch For 1000+ Users Network

Feb 6, 2013

Wondering if this switch is capable of being a backbone switch for a network of about 1000+ users and if the switch can handle a sustained 30Meg of data going across it?

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Cisco Switching/Routing :: 3550 - Rip 1 Across Different Vlans

Jul 24, 2012

The situation include 2 cisco routers an 2 switch 3550
so we have  Router A  in Vlan x access ----->Sw1----Trunk----Sw2<------Vlan y Access Router B I 've to enable rip1 on guys A and B ONLY !!! Avoiding any kind of tunnel I though it was all around fallBAck bridging ... but after days of tries ...

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Cisco Switching/Routing :: 3550 QOS For Voice Over IP

Oct 25, 2011

We're looking at implementing a new phone system which will use voice over ip. Currently we have a mixture of Cisco 3750 and Cisco 3550 switches which don't support power over ethernet. Its been suggested we could continue using the current switches and power the new phones using power adapters.
Int terms of implementing qos (we don't have any at the moment) for the voice will a Cisco 3550 be OK and will having a mixture of different models using 3550 and 3750 pose any challenges with the qos policy for the voice. I believe there are differences in that the Cisco 3550 doesn't support srr-queues but having little experience with qos I'm not sure what impact this will have if any?

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Cisco Switching/Routing :: QOS Between 4510 And 3550?

Oct 31, 2011

I am having issues working on my QOS between 4510 and 3550 switch connecting on layer 3 through a service provider. I have class maps and policy map setup on both sides and then policy map attached to interfaces however i dont see any traffic matching in policy map on 3550 switch, i do see some traffic matching on 4510 but the speed with which its increasing has my doubts about it. When i make voip calls ( VOIP switches are sitting behind 3550 and are mainly 3550 pwr 24 port switches with phone ports configured for auto qos voip cisco-phone and trusting cos) i rarely see the RTP matching in class under policy map.

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Cisco Switching/Routing :: Installing Ios On 3550?

Jan 17, 2013

im trying to install a ios 12.2v on my switch. when the screen prompt it does not show me the user move symbol " SW1> ". all i see is " SW:" and from there i can not enter the commands to download from tftp server !

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Cisco Switching/Routing :: Upgrading From Cat 3550 To 3750?

Aug 30, 2012

we have   two core swiches 6506 and  around 55 cat 3550 switches. currently we are on the process of replacing   the cat 3550 switches to 3750 switches.We need 10/1000/1000  speed, ip base image with upgrade options. Our up links from cat 3550s(sfps) are  single mode and  dual mode fiber  mode with 1 gbps  ports on core switch.
At present we are not upgrading to 10 gb modules  on core. Spread over 15 floors  each floor needs  2 up links(single mode , and dual mode). since cat 3750  sfps are smaller in size existing  gibics cannot be used. Looking for the best option of cat 3750 switches with 1 gb up links which can be  upgraded to 10 gb later  when we replace the  modle on core. Requirements:

1- Cat 3750 switches 55 in no with sfps for 1 gb up link (dual mode fiber and  single mode fiber)

2- stacking option

3- 10/100/1000  speed

4- ip base image upgradable  to ip service image

5- ipv6  compatibaility. Network is spread over 15 floors so from each floor  we need two sfp  up links 1 gbps  using dual mode and single mode

-6-Should be upgradable to 10 gb  in future when we upgrade  the core modules
Or is it better to go for 10 gb module in core as well as  edge switches ? if so what should be the modules?

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Cisco Switching/Routing :: Policy Map On 3550 Not Working?

Sep 27, 2012

We have a metro Ethernet service, basically our WAN connection, that we use to connect 4 sites. This MOE service has a CIR of 200 Mbps, connected to a port on a 3550-12T running Version 12.1(22)EA5 at 1000 Mbps. We are exceeding our CIR at times during the day for short bursts which is causing the MOE switch to drop packets, which I suspect I am seeing manifest itself in some choppy VoIP conversations and dropped ICMP packets from our network monitoring software. I implemented policy maps to apply an outbound service policy to the interface connected to the MOE service, but I am not seeing any matches to the access lists or the service policy. I’m not sure if I am missing something or perhaps the IOS is not capable?
Below is the config for the service policy and some command output. Notice that there are hits on a statndard access list that is used for other purposes, but the extended access lists used for the class maps have no matches.
class-map match-all REALTIME
match access-group name REALTIME


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Cisco Switching/Routing :: Separate Network On 3550-12G?

Sep 26, 2012

How do I configuring Private Class A [] and Private Class C [] Network on Cisco 3550-12G Switch.

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Cisco Switching/Routing :: Configure Qos On 3550 Interface?

Aug 3, 2012

I was trying to config qos on 3550 interface
Match protocol is not supported for this interface
So does this mean that qos is not supported on 3550?

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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 :: 3550 - Not Getting Internet As Well As Ping

Feb 19, 2012

We had re-arranged and purchased new public ips and changed with new modem. Following is the new network setup diag
I have started the configuration, but stucks at a point. Current configurations setup and ip assigment is as follows
ISP modem/router(>( Router(>( vlan 10 -, interface vlan 192 ->2950

1)Configured 3550 as layer 3 switch and create a default route to

2) Configured 2 static routes(for 2 vlan range traffic) and one default route to

3) ip pass through is not configured yet, still the public ip is configured at the isp router 
1811 static route configs
Ip route
Ip route
Ip route 
3550 static route config
Ip route
Testing results 1)All  lan communications are working fine(inter vlan also), ping to all  servers from router is getting and ping to outside public ips are  getting from router,but not getting ping from switch 3550 to  and any of the public ips(internet).

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Cisco Switching/Routing :: 3550 48-SMI Software-Update?

Oct 17, 2012

I have an Cisco 3550 48 SMI running IOS (tm) C3550 Software (C3550-I9Q3L2-M), Version 12.1(13)EA1a. Software advisor says that I can only update to Version 12.1(22). The software download area tells me that the latest version is 12.2(44).
know if I could use the latest 12.2? Or has the hardware changed with the IOS versions?

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Cisco Switching/Routing :: 3550 Wireless Access Points

Feb 11, 2013

what I can do to accomplish my end goal of safe public wifi and configuration.I have 2 domain controllers (for redundancy) with a split scope for DHCP and they both serve DNS. I have VLAN 2 (management), VLAN 3 (Servers), VLAN 4 (Wired Access), VLAN 6 (Wireless Access) and VLAN 480 (Outside Wireless). I have setup INT VLANs for all of these on my main router (Cisco 3550) with the ip-helper address to the DC for all but the VLAN 480. All of this works great, and the scopes are setup just like the VLANs. (ie (management) .3 (servers) etc.)I was wondering if there is a way to have VLAN 480 get DHCP from the cisco 3550 as a random address say,
On a side note, I have seperate Wireless Access Points for the outside. (From a guy before me) I understand you can have a guest wireless setup on the newer Access Points, and trunk (cisco term) the 2 VLANs and seperate them out with Access Control Lists so they don't talk to each other, but I would rather just give the VLAN 480 it's own DHCP from the router.

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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 :: 3550-24-PWR Can't Ping Aironet 1231

Oct 30, 2012

I have two 1231G Aironet's that work correctly when I connect them to my Catalyst 3548XL and my 3550-48-XL switches.  When I connect them to the 3550-24-PWR switch I do see them when I issue sh cdp nei det.  It shows me the IP of the wireless router.  But when I ping the Aironet, I do not get any replies. If I plug the Aironet into my 3548XL and ping the IP, I get 5 replies.  Here is the port config on both switches:
     switchporrt trunk encapsulation dot1q
     switchport native vlan 100
     switchport allowed vlan 1,69,100,125,200,1002-1005
     switchport mode trunk
     spanning-tree portfast
Here is the sh cdp nei det results:
     Device ID: North_AP.mtd.home
     Entry address(es):
       IP address:
     Platform: cisco AIR-AP1231G-A-K9    ,  Capabilities: Trans-Bridge
     Interface: FastEthernet0/3,  Port ID (outgoing port): FastEthernet0

I have tried two versions of the IOS on the 3550PWR switch.  Right now its: c3550-ipservices-mz.122-44.SE6

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Cisco Switching/Routing :: 3550 - Redirecting Port 80 Traffic?

Dec 12, 2011

How do I redirect my port 80 traffic to my Trend Micro IWSVA in my 3550 switch? How do I use PBR? Can I use WCCP in my 3550?

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Cisco Switching/Routing :: GLC-GE-100FX - Connection To 3550 Switch Over MMF

May 21, 2012

i have an OM1 MMF fiber run between two switches, the first being a 3750 and the second being a 3550.
The link currently exceeds the maximum distance for OM1 @ 1000Mb/s (220m) so i would like to downgrade the link to 100FX using the necessary SFP's/GBIC's to extend the maximum distance to 550m and run the link @ 100Mb/s.
I have the part code for the 100FX SFP to install in the 3750 (GLC-GE-100FX) but cant find a 100FX GBIC for the 3550, can I use a 1000SX GBIC (WS-G5484) for the 3550 at one end and the 100FX SFP at the other? Any success with this configuration over MMF?

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