Cisco WAN :: How To Configure Vlan Tag On Routed Layer 3 Interface In 3945 Device

Jun 10, 2012

how to configure vlan tag on routed layer 3 interface in cisco 3945 device?

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Cisco Switching/Routing :: Possible To Configure QoS On 4500 Sup7 On Layer 3 Routed Port

Apr 26, 2013

I want to know if is it possible to configure QoS on a 4500 Sup7 on a Layer 3 routed port like the following example (Similar to CBWFQ on IOS Router)?

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Cisco :: How To Configure IP On Layer 3 Interface On Nexus

Apr 11, 2011

With most of my Layer2/Layer3 switches, I'm accustom to giving them a SVI on my management VLAN, and calling it a day. I can't find in the Cisco Nexus guides how to do something similar; everything points to the mgmt0 physical interface, which seems like I need to uplink it to an access port on another switch. Can somebody point me in the right direction for how to do give the Nexus an IP that I can ssh/snmp into it across a trunk for management? I must just be missing the keyword.. NX-OS is still quite a different beast.I see in the manual it says: "SSH has the following prerequisites: You have configured IP on a Layer 3 interface, out-of-band on the mgmt 0 interface or inband on an Ethernet interface." Cisco Nexus 5000 Series Switch CLI Software Configuration Guide page 284, How do I configure an IP on a Layer 3 interface on a Nexus?

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Cisco WAN :: Configure More Than One Layer 3 Interface For Netflow On 3845?

Mar 20, 2013

Is it possible to configure more than one layer 3 interface for netflow on a 3845? I can't seem to do it. Is there something I am missing?

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Cisco Switching/Routing :: 2900 - Nexus 7010 Layer 2 VLan 11 Active But Interface Shutdown

Sep 13, 2012

I understand the vlans on the catalyst side of the house on 2900 to 6500 Catalyst switches.
This 7010  running nx-os 5.1(3) I did not setup, but have to manage it.  Hasn't really been a proble till now.
My nexus 7010 has a Layer 2 only vlan 11. It is "Active" but the interface is "shutdown".  Yet, it is passing traffic across the directly connected  ports on the nexus 7010 and to other switches in my network.  Vlan 11 is being set out via VTP to all my switches and things are running fine.
I need to create another L2 only Vlan.  I can't seem to find any docs  that indicate that a Layer2 vlan Interface on nx-os should be in  "shutdown" mode as part of the setup. I do see in the docs where it has  to be set "Active" as part of the process.
Is this the correct way to seutp a L2 only vlan on nex-os? Leave the interface in "shutdown" but make it "Active"?
Mystery Vlan 4 and 6
The mystery deepens.  I have other L2 vlans ,Vlan4&6 that are NOT defined as "Interface Vlan4" in the nexus config, yet it is applied to GigE ports on the nexus and these Vlans 4/6is also being sent out VTP to all switches.  Even weirder is that these vlans have names associated with the numbers.  These are valid Vlans that were configured on the old 6509 before the Nexus was installed.
I have checked all switches, NONE are running in Server mode for VTP, all are in CLIENT. The nexus 7010 is the only device running in VTP Server mode. 

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Cisco Switching/Routing :: Sg300 And SLM2024 VLAN As Layer 2 And Layer 3 Switches Connection

Mar 18, 2012

I want to setup VLAN with the switches SG300 and SLM2024. What is the suggestion to connect these 2 switches. We have the Juniper net screen.

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Cisco WAN :: 6513 / Configure ASR Interface In VLAN

Apr 22, 2013

Actually I am new to this ASR , in my environment my 6513 is connected ASR , I want to know how can we access and configure VLAN on Gigabit interface which is connected to 6513.

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Cisco Switching/Routing :: 3750-X OOB Management With IP Base And Routed Access Layer

Aug 14, 2012

I've got a bunch of 3750-X switches all running IP Base and acting as a routed access layer. They run OSPF in a totally stubby area with the distribution layer (Nexus 7K) as the ABR. We also have a physically separate management network into which the fa0 management interface of the 3750-X is connected. The management network itself runs OSPF and has multiple subnets and external access.
On the 3750-X, I'd ideally like to be able to run some sort of separate OSPF process for the management network or at the very least have a static default route for management traffic pointing out the fa0 interface, but clearly not have it interfere with the main default route for data traffic coming from the N7K ABR. Normally I'd just create a management VRF, sling the fa0 interface into it and run a separate OSPF process in that VRF. The problem is you can't create VRFs in IP Base! Surely there must be a way to do this? Cisco don't really expect customers to upgrade to IP Services just to have a working OOB Management network, do they?!

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Cisco :: Upgrading 3745 To A 3945 Device?

Mar 29, 2012

I have to replace the 3745 which is our edge router (running (C3745-ADVIPSERVICESK9-M), Version 12.4(23), RELEASE SOFTWARE (fc1)) with (I think) a 3900 (drawing from memory, I haven't actually seen the device yet).In an ideal world, I SHOULD be able to just set term length to "0", do a show run, copy that off to a text file, and then paste it into the new one...

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Cisco :: VLAN Access Across A Routed Port?

Apr 20, 2012

I have an old Nortel network with a bunch of servers attached. Connected to it is the new Cisco core, by way of a routed port. My task is to migrate servers over to the Cisco side of the network, with minimal downtime, and have full network connectivity, retain IP addresses/remain on the same subnet, and retire the Nortels. The Nortels are running VRRP, so I can fail the gateway over by becoming part of that group and later dropping the Nortels, but I can't seem to get a host on the Cisco side to participate in the original subnet. The routed port kills VLAN traffic, so I tried bridging the VLAN with the routed port, to no avail.

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Cisco Switches :: Setting Up Routed VLAN On SG 300-20

Mar 24, 2011

I got the SG 300-20 small business L2/L3 switch. I've read through the 325 page pdf manual and I still can't figure out how to do what I need to do. Here is my setup using example ips.[code]

I want to be able to have any workstation I put on the workstations vlan to use as a gw and from there route to and from there to the outside. Basiclly, I want to be able to route ips from two different subnets on two different vlans. I've read through the docs and so far I have vlan1 setup and vlan 2 setup fine but I have no clue how to get the routing to cross vlans. The docs say the only way to have vlans talk to each other is by routing through the vlans ip interfaces but I have no clue how. There isn't a simple step 1,2,3 chapter that gets you to route between two vlans. What am I doing wrong? I put in some IP route entries but nothing seems to work.

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Cisco :: 3945 / 3750 / 2911 - Cannot Find Applicable Device Package

Mar 4, 2012

I  have a trouble with Cisco view 6.1.8. I had update offline device package because i don't have internet . When i connect to switch router 3945 and switch 3750, router 2911 on Cisco view  then I receive "cannot find applicable device package for". Need to reinstall device package. The version of Cisco work LMS is 3.2. I check Active log and receive message .

The Package(s) Selected for Install :  
Cat2960, Cat3750, Rtr2900, Rtr3900, Rtr7000 
WARNING :  Cat3750(14.0):Consistency check failed for base package DtShare 
WARNING :  Rtr3900(5.1):Consistency check failed for base package NGMARShare

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Cisco WAN :: Configure 3945 With SM ES3G-24-P?

Apr 12, 2013

Our company have purchase new cisco 3945 and install SM ES3G-24-P.
Etherswitch already configure and can access service module. But assigned VLAN in a port and and ping the host connected on is RTO from the router.
Do i need to upgrade the IOS of the chassis so that the SM installed be detect as ordinary GE port?

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Cisco WAN :: Catalyst 3550 Switch Routed Interface

Feb 21, 2011

we are using the catalyst 3550 L3 for BGP routing. For e.g. Gi 0/4 is our internal interface tha we want "switch".
We need on Gi 0/5 the same network that is on gi 0/4.
How is it possible?  Make it like a 2 port mini switch. Or make a bridge of these 2 interfaces without any complicated reconfiguration needed?

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Cisco VPN :: To Ensure That Traffic Is Not Just Being Routed Out Of Interface 3825

May 31, 2011

I have my main branch router (3825) and two remote routers (2821's).  They are connected through leased lines that do not touch the internet.  For various security reasons I have to ensure that the traffic from the remote's are encrypted in a VPN tunnel even though it is still part of a private network.I have went ahead and created the tunnels and I can verify that they are up.  I have applied the cryptomap to the correct interfaces, etc.So the question is - How do I ensure that traffic is not just being router out of the interface from the remote sites back to the branch router with or without using the VPN tunnel?  I've taken down the tunnels and of course, the traffic is still being passed back and fourth.

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Cisco WAN :: 3745 - L2TPv3 And Routed Interface On Same Router

Oct 30, 2010

I have a subnet (vlan 104) working great across a WAN.  At site 1, Router A (3745) has the L2TPv3 tunnel configured while Router B (7204) has a routed interface on vlan 104.
The only thing router A is doing is the tunnel, so I'd like put the tunnel on Router B and eliminate Router A.
The trouble is, when I move the configs to Router B, the tunnel comes up, but the far side does not receive traffic over the tunnel.
Router B shows sending and receiving packets (per the 'sh l2tun session all' command). The far end router shows sending packets but receiving 0.
Is it a problem to have both the vlan 104's L2TPv3 xconnect interface and the vlan 104's routed inteface on the SAME router?

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Cisco Switching/Routing :: Use Sub-interface On Routed Port On 6509

Mar 14, 2012

We are looking for a solution that to use Sub-interface on a routed port on 6509, instead of using a SVI on it.Are there any different when using Sub-interface?

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Cisco Switching/Routing :: 7600 - Assign Vlan On Routed Port?

Apr 12, 2013

Actually i have 7600 router and all trafic passes through Gi0/1(Routed port) interface to 6500 series switch. I need to create  a vlan on this router  eg. vlan 10 Any how it is possible assign a vlan to routed port and traffic of wan interfaces and the vlan traffic  passed together.

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Cisco Switching :: 3750 - IP / VLAN Planning For Routed Access Design?

Sep 10, 2012

We are currently designing a complete Layer 3 to the edge solution for our customers. The network design is a combination of a collapsed core (Core to access) as well as a three layer model (Core/Distro/Access) for connectivity to the Data Centre, Internet and Wireless Blocks.
The core of the network contains two 6509E switches interconnected on a Layer 3 Port channel (no VSS). Access Layer switches (3750 Stacks) connect to the core switches over p2p routed links (Collapsed core part of the design). Distribution layer switches provide connectivity to the Data centre, Internet and Wireless Blocks.(three layer model.
All IP addressing is being planned for assignment from the private RFC 1918 address block( for both Infrastructure and Access layer VLANs for users.
Clarifications required for the following:


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Cisco WAN :: Cannot Configure A Voice-port On Router 3945

Dec 21, 2012

When I try to configure a voice port (like voice-port 0/0/0:15) after doing a conf t, it gives me an error of invalid input detected.We are using a Cisco 3945. We have successfully setup 3825 and 2851 in the past.

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Cisco Switching/Routing :: 3945 / Using CBWFQ Before Reaching Interface Max Bandwidth

Jan 11, 2012

CBWFQ kicks in when the interface becomes congested and there is no available space in the queue but I need to find a solution to the scenario below:Im using a Gigabit interface on the 3945 Router that connects to the ISP. The ISP limits bandwidth to 60Mb so I need to make sure when I reach the limit of the 60Mb the router starts using the BW percentages defined in the policy-map using classes. any kind of traffic go out as it wants but as soon as the 60Mb limit is reached, the priorities defined by the traffic classes will kick in just as if the interface ran out of queues (as CBWFQ usually works).

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Cisco WAN :: 4506s - Switch Virtual Interface (SVI) Versus Routed Physical Port

Feb 28, 2012

What are the pros and cons of configuring a Switch Virtual Interface (SVI) versus a routed physical port between layer 3 switches?For example, if I have two 4506s and have a need to run HSRP and route between them which feature is better and why?
interface vlan 25
ip address
interface fa0/1
switchport mode trunk


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Cisco Switching/Routing :: 3750 Switch - Routed Interface / Traffic Composition

Feb 21, 2012

On a router I can use IP Accounting or Netflow to see what kind of traffic is moving over an interface.  Are there any tools on a 3750 switch with a routed interface which would tell you who is hogging the bandwidth on that interface?

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Cisco WAN :: 2431 - Configure IAD So That Phones Are Routed Based On Destination Network

Jul 12, 2012

Our ISP has set up a Cisco 2431-16fxs IAD (dual WAN) in one of our locations. It is used to connect the devices (PCs and SIP phones) on our LAN to internet (via 1st WAN port) and ISP's MPLS-based voip network (via 2nd WAN port).
We have 2 LAN subnets - the first subnet (PCs) requires internet access only, so it goes out via the 1st WAN port. The 2nd subnet (SIP phones) is connected the MPLS network (via 2nd WAN port).
We would like to have the SIP phones (that connects to MPLS-based network 192.168.1.x) to be able to access the internet. Is it possible to configure the IAD so that the phones are routed based on destination network; i.e. anything to 192.168.1.x via 2nd WAN port, anything else to the internet via the 1st WAN port?

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Cisco Switching/Routing :: Configure 1941 With Routed Subnet From ISP To Forward To Server

Feb 13, 2013

I have some questions about how to configure my Cisco 1941 with a routed subnet from my ISP to forward them to 1 or more servers in my LAN.1 Routed subnet /29 from my ISP (over a fiber connection).In my LAN I have (at the moment) 3 servers, and about 15 clients.I would like to use the first ip address from the routed subnet for internet traffic from all the clients in the LAN.I would like to use the second  ip address from the routed subnet for server1 so that server1 accept some allowed connections and that server1 connects to the internet with the second ip address from the routed subnet
I would like to use the thirth ip address from the routed subnet for server2 so that server2 accept some allowed connections and that server2  connects to the internet with the thirth ip address from the routed  subnet.I would like to use the fourth  ip address from the routed subnet for server3 so that server3 accept some allowed connections and that server3  connects to the internet with the fourth ip address from the routed  subnet.[code]

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Call A Router As Data Link Layer Device

Feb 15, 2013

What is the reason to call a router as data link layer device

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Cisco Switching/Routing :: Missing Commands Using DHCP / TFTP To Configure 3945 Router

Apr 10, 2012

I am using DHCP/TFTP to autoconfigure a 3945 router.  The router properly obtains an IP address and finds the correct TFTP server.  The issue lies in the download of the configuration file from the TFTP server.  The router downloads the file, gives the "Ok" message, and prompts you to press Return to get started.  When I view the running-config, several commands are missing from the Serial 0/0/0 section (HWIC-2T).  If I modify the config file on the TFTP server to use Serial 0/0/1 instead and repeat the process, the configuration file loads without any issues and Serial 0/0/1 has all of the commands.
I also tried moving syntax around in my config file, but the end result is still the same.  If I use Serial0/0/0 - I don't get all of the commands.  If I use Serial 0/0/1, I do.

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Cisco Wireless :: Inter Subnet Roaming With No Layer Device 3825

Mar 29, 2012

The following picture is from a network in a hotel:
- Cisco 3825 is managed by AT&T. No access to this.
- There is no Layer 3 device in this network.
- Access Gateway at 100.1 operates at Layer 2. It receives tagged traffic in order to keep track of billings and user accounts so we can't add a Router in internal network. (Please verify)
- WLC's Management Interface lives in VLAN 100 at 100.2 with Default Gateway of 100.1
- Another WLC with Management Interface different VLAN than above, will be connected to the "Core Switch" to have Mobility.
- With Mobility Groups, IP connectivity must exist between the management interfaces of all controllers.
- Routing between VLANs need a Layer 3 device.
Any possible solutions to establish IP connectivity about the following:
- Changing Management Interface VLAN on one side and match it with the other side to eliminate Routing Requirements and having Inter-Controller Roaming instead of Inter-Subnet Roaming. (Reboot required?)
- Adding a NAT device between two WLCs and use Proxy ARP. (Haven't done this before, does this work?)
- Do you have better solution(s) in mind?

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Cisco WAN :: 3945 To 7206 Router Via IGX 8400 / Configure VoIP With Existing Frame Relay Network

May 19, 2011

Application is that need to configure the VOIP  with the existing Frame relay network ,where VOFR  command is not shown in the router when type yhe command router config#dial-peer voice 123 need vofr On the 3945 router where in the router it is not accepting the above command,

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Cisco Switching/Routing :: 5520 Configure Traffic Flow Between Computers Inside VLANs And Routed Port

Jul 7, 2012

How to configure traffic flow between  computers inside VLANs and a routed port? Here is the setup details:
1. Switch 3750-X
2. VLAN 100 - ( SVI IP address /24)
3. VLAN 200 - ( SVI IP address /24)
4. routed port gi1/0/48 (IP address /24). Note: this port is directly connected to a firewall ASA 5520 port IP /24
Ip routing is enabled on the switch and inter vlan traffic is flowing ok. I can ping the routed port gi1/0/48 from  any computer connected in the VLAN 100 or 200. For example computer with IP can ping the routed port Switch can ping firewall port and the 'sh ip route' command shows the network /24 as directly connected network.
any computer in the two VLANs CANNOT ping firewall ASA port   Is it because inter VLAN routing does not work with a routed port on L3 switch? I looked up fallback bridging, but it is meant for non IP traffic.The goal is I am trying to set the ASA port as an internet gateway for VLANs. 

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Cisco WAN :: 6509E - Extending VLan Through Layer 3 Connection?

Feb 12, 2013

in our environment we have a 6509E as a core switch which is connected to five 3750G installed in remote sites and are layer 3 routes. the routing protocol is ospf. i am just wondering if we could possbily create a vlan in the core switch and extended it to the remote site throug layer 3 connection. The reason we are thinking to do this we want to have a server redundancy if one of the server goes in the core site we can just turn on the server which is in the same vlan in the remote site so that we can limit the downtime .

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Cisco WAN :: VLAN Routing On Layer 3 Catalyst 3560

Jan 15, 2013

My first question is I have an access layer switch which is a single VLAN and I am trunking that VLAN to a distribution layer switch, I can ping the gateway on the distribution layer switch for THAT VLAN, But cannot ping the gateway address for the second VLAN I have on the distribution layer switch. I know it is simple, But I have forgotten and just need a push
Also I have a third VLAN set to  route traffic not bound for those 2 VLANs out to a router is the statement "ip route" good enough and do I actually need to create a VLAN for that traffic? and if so, is an access switchport the best option?

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Protocols / Routing :: VoIP VLAN Over Layer 3

May 17, 2011

I just inherited a network and feel like.I am missing something. We use ATT&T Opt-E-Man which limits the MAC address to 50 for the connection or you have to pay.Hence the routing VLAN is the only access across the two sites.I have a VoIP vendor who insists on using the same VLAN for all sites. Upon exam the VLAN is at the remote site but it does not work.

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