Cisco Switching/Routing :: GRE Tunnel Alternatives For 3750?
Nov 22, 2011
I am looking for alternatives to GRE since it isnt officially supported on 3750's. I am dealing with a Managed MPLS situation where the carrier manages the routers at each site and I only have read-only access.
The carrier is resistant to making any changes to the router since it would be a one-off or deviation from their standard config. What I am trying to do is to force all site traffic for our department coming from different locations to be forced all the way back to corporate and not "see" any of the other departments. I am not concerned about encrypting the traffic but finding a way to route the traffic back to corporate since I am pretty much not able to make any router changes.
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Jul 1, 2012
1. i have a few sites which are interconnected.
2. there are multiple mobile sets of equipment(servers and catalyst 3560 switch) which i need to connect at different sites. (i cant use repeated subnets)
3. i cant change the ip address/subnets/configuration of the servers and switch, when deploying at different sites. (big problem to me)
i was previously looking at IP unnumbered + OSPF to apply on the mobile sets of equipment. but noticed that IP unnumbered on non pt-to-pt interfaces (which happens to be a 3560) does not work with dynamic protocols. is there any solutions/alternatives which i can achive mobility on equipment?
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Nov 20, 2011
In fact i receive traffic on a one client per vlan basis (traffic is PPPoE), i receive all this traffic on a router, collecting all these vlan on a bridge where the pppoe packets are treated.When I use a transeiver to convert operator fiber arrival to my router copper media interface, i have no problem....
When I use dot1q-tunnel to make the same on my 3750, packets seems to be corrupted.I get PPPoE timeouts and packet loss, not regulary, totally stochastic...
I made dozen of tests and different settings, without success I first thougt of MTU issues. [code] I made tests with system MTU and/or system jumbo MTU above 1500, without success.I didn't found any known caveats on 3750 running Version 12.2(25r)SEE4 related to dot1q-tunnel.
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Jun 30, 2012
Do I need the Universal image to perform stftp on a 3750 or 3750-X?
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Oct 10, 2011
I'm looking at adding a Cisco 3750-X switch running c3750e-universalk9-mz.122-55.SE1 (IP base license) into a stack of 3750-G switches running c3750-ipbasek9-mz.122-55.SE1.bin Given that the version and feature sets are the same I don't forsee any compatibility issues. Would there be any reason why a universal image wouldn't stack correctly with other switches running the single .bin file?
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May 21, 2012
We have a stack of switches that is at the max number of members allowed in the stack. Problem is we are running out of port density and need to add more ports. So instead of adding a whole new stack I would rather replace 2 of the 24-port swicthes with 48-port switches.
If the two 24-port swicthes we are removing are stack members and neither of them are the stack master, I should be able to replace the 24-port switches with the 48-port switches without bringing the master offline? If the new 48-port switches are running the same IOS version as the current 24-port swicthes, they should add themselves to the stack?Would I have to tell the new 48-port swicthes what switch numbers they are replacing in order for them to be added to the stack since we are at the max number of members?Also since the 48-port swicthes are replacing 24-port switches will the master give the 48-port switches the configuration for only the 24-ports?
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Oct 30, 2012
I currently have an RV180 in a small business set-up and curently being accessed remotely by laptops (Quick VPN) and Ipads/Android ICS tablets (PPTP). All is working well but I've become concerned about the security risks of PPTP and would like to shift the tablets to IPSec.
1) For a small business are the PPTP risks real?
2) What are the alternatives for Android ICS? I can't find a Quick VPN client for Android.
3) I can't get the core IPSec VPN in Android to connect to the RV180? Is this possible?
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Jan 15, 2012
We are a business partner of a larger company that gives us a VPN access to connect to one website. It's the Nortel VPN so it's old but it's set to disconnect our Internet when we connect which is really inefficient. I understand why it does that but right now we use two computers, we have one as our main one then another sitting here just for VPN.Does the Nortel VPN work system wide when it disconnects the Internet? Or is there a way to use Ethernet and Wifi and just have the VPN connect over Ethernet and just disconnect the Internet there but keep my local network on Wifi? Or is that not possible? I'm assuming it's not just wondering if there's any alternatives.
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Dec 4, 2012
I have configured a site to site VPN tunnel using my Cisco ISR 891 router. The tunnel connects between my network 10.88.10.0 to the remote network 10.210.65.0. When I ping the remote nnetwork my VPN tunnel comes up and all is well.
I have recently connected a second network to my 10.88.... network. The new local network is 192.168.0.0. I have now managed to get the two local networks pinging each other. I can also carry out RDP sessions between systems on both networks. Hence I am happy that both networks are communicating.
I used the Fastethernet Port 8 on my ISR 891 to physically connect to the new 192.168 network and then entered the appropraite 'Static Routes' on the 192.168 exisiting router(Netgear Router). Hence certain traffic arriving at the netgear will now be forwarded to Port FE8 on the cisco ISR 891.. See FE8 Port config at the bottom of this post. I have used tracert to ensure that the traffic does arrive at Port FE8,(192.168.0.235).
I cannot seem to ping any device on the remote 10.210.65.0 network from the 192.168 network. However, as stated above I can sucessfully ping the same remote device from the local 10.88 network. I must be missing something that allows the 192.168 traffic to use the existing VPN tunnel. I have added the following command to the IpSec rules for the VPN tunnel using the Cisco Configuration Professionla tool.
Permit 192.168.0.0/0.0.0.255 10.210.0.0/0.0.255.255 ip
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Dec 9, 2011
some of our switches have the switchport mode trunk command configured between the 3750 switches but other 3750 switches connected to our 6509 core switch do not have the switchport mode trunk command to permit Vlans from going across the swtiches instead it has an ip address and says no switchport what is the difference between does two. Is trunking used only for Layer 2 and L3 is used to route interface vlans?
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Mar 30, 2013
So I finally got rid of the network cable across my hallway, yes it was faster, however It was ugly and I just didn't like it being there or having to cover it etc.
My attic makes a simple drop very difficult. I would need to cut into my plaster walls and hire a drywaller who knows how to work with plater to fix them, then re-paint my walls etc.
I always thought wireless N would be too slow to stream larger H264 files mkvs etc. So I bought a new ASUS Wirelss AC router, and AC network card.
I also bought some toplink 500mbps power outlet transmitters to test in the bedroom. This PC also has a ASUS PCE-N13 300MPS wirless card (150MPS upload), that was missing antennas. I borrowed some wireless g antennas fro some old routers to to test it out. For the Tp-Link Power Line adapters I tried 3 plugs that are all on the same braker, and in fact are wired off the same run.
Both living room and bedroom are pretty close to the office, with 2 walls (but also 2 door ways that line up through a JackNJill bathroom (so no walls?) directly into the bedroom. The living room has to go through one wall and around the hallway corner.
So the ASUS AC network card picks up the router at 833Mbps in my living room.
The ASUS PCE-N13 picks up at 150/133 Mbps in the bedroom.
The Toplink 500Mbps powerline adapter is shows as 100Mbps.
When plugging in the powerline adapters the Gig router it as a 100Mbps line too (Yellow light). Shouldn't this register as a Gbps line? How can they claim 500Mbps is they are only using a 100Mbps controller?!?!
[Code]...
So it seems like wireless N is working much better for me than the powerline adapters? I really like the hard line style of the adapters, but it concerns me that they are only detected as 100Mbps devices. How can they be detected as 100Mbps but claim up to 500Mbps? Should I send these back and try different powerline adapters? Or maybe I should just get another wireless Asus wireless AC card.
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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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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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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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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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Jul 27, 2012
I have the task of replicating the router config on a 3825 router on a 3750 switch. Reason is we are taking out the router and replacing it with the switch to make use of the router for other functions.
Below is main part of the router config:
!
ip source-route
ip cef
!
!
multilink bundle-name authenticated
!
license udi pid CISCO3825 sn FCZxxxxxxx
!
vlan internal allocation policy ascending
[code].....
The 3750 switch I have runs C3750E-UNIVERSALK9-M, Version 12.2(55)SE3 on a LAN BASE license.
The first thing I have done is to order for a license upgrade to IP BASE which would give the support for OSPF routing.I do not see much of an issue with the Interface configs, however, I am not too sure about replicating the routing config on the switch.
My question is can I run the commands as shown for the OSPF routing on the switch? If not, can I get suggestions on how best to set this up on the switch?
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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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Jan 24, 2013
For intervlan routing, Is 'IP routing' command enabled by default on a 6500 series switches based on the IOS?and on 3750 switches, do we need to enable the "ip routing" command manually for intervlan routing?
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Nov 21, 2012
I am using a 3750 as a default gateway for multiple Vlans on a few 2960 switches. The trunk lines are configured and working and I have assigned ip addresses to each of the Vlan interfaces on the 3750. My issue is that I can only ping the ip address on the Vlan interface of the 3750 if I have a working computer plugged directly into the Vlan on the 3750. I only have 3 vlans on the 3750 that have hosts directly connected (vlans 2, 10 and 40) the other vlans ( 20 and 70) don't have any clients plugged into them on the 3750 but the hosts reside on 2 different 2960s that connect via trunk ports. How do I keep the vlan interface on the 3750 switch pingable when I don't have hosts directly connected in that vlan on the 3750? (yes, I have enabled ip routing on the 3750)
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Oct 17, 2011
I have a simple design with 3750. I configured a route-map which define a next hop. I defined this route-map on a policy on a vlan interface.When I test some ping and a debug ip policy and it seems that my policy never match.Is there any mechanism that prevent the switch from using PBR? I think of CEF .
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Jan 28, 2013
In our datacenter we have a 3750 stack with IP base image. I have enabled PBR and reloaded the switch. Show sdm prefer says i am using default template. The reason i want to use PBR is that we have 2 firewalls on the same work and want to be able to have granular control over which gateway out of the network they use but still be able to access all internal resouces accross wan and locally.
Created access list to identify traffic:
access-list 10 permit 10.2.3.59 (test workstation on vlan 3)
Created policy:
route-map TestASA permit 10
match ip address 10
set ip next-hop 10.2.0.3
Assigned policy to the user vlan3:
ip policy route-map TestASA
Results:It changed the default gateway to the above gateway but i could not access any resources on any other vlan, could not access resouces accross wan.
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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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Sep 5, 2012
I have a simple design with 3750.I configured a route-map which define a next hop.I defined this route-map on a policy on a vlan interface.When I test some ping and a debug ip policy and it seems that my policy never match.Is there any mechanism that prevent the switch from using PBR?
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Mar 11, 2012
I'm running into what seems a basic ip routing config problem with a Catalyst 3750 (IP Base) switch. I have several VLANS configured on the switch with IP routing enabled, and the switch is connected to the inside interace of a new ASA 5520 as follows:
ASA5520 IP (Default gateway): 192.168.1.1Switchport Gi1/0/1 is configured as a routed port, IP address 192.168.1.3 255.255.255.0Example VLAN is VLAN 100, IP address 192.168.100.1 255.255.252.0 From the switch CLI, I can ping all VLAN addresses, as well as the ASA5520, and the client laptop I'm testing with from VLAN 100.
From the client laptop on VLAN 100, I can ping all switch interface and VLAN addresses (inter-VLAN routing is working), including 192.168.1.3, but I CANNOT ping the default gateway at 192.168.1.1.
Here is the relevant configuration information on the 3750:
!
no aaa new-model
switch 1 provision ws-c3750x-24
system mtu routing 1500
[Code]....
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Jan 1, 2012
I have a Cisco 3750 with private VLANS configured.. VLAN 2 is the "primary", VLAN 3 is "isolated" and VLAN 4 is "community". This is all working correctly, however I now have the need to another VLAN called "production". I need the production VLAN to be able to reach all the private VLAN hosts (community and Isolated), and vice versa
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Oct 30, 2011
For intervlan routing, Is 'IP routing' command enabled by default on a 6500 series switches based on the IOS?hes, do we need to enable the "ip routing" command manually for intervlan routing?
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Dec 2, 2012
I have 2 ISP connected to Router A and Router B.Both the routers are connected to the core 3750 switch.. I want to send the traffic from the switch that goes to router A to router B..[code]
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Feb 27, 2013
I have just bought two Cisco 3750 and stacked them. When in global config mode, The IP Routing Command does not exisit.
See Version below
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(55)SE3, RELEASE SOFTWARE (fc1)
Technical Support: [URL]
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Thu 05-May-11 15:40 by prod_rel_team
Image text-base: 0x00003000, data-base: 0x02800000
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Nov 23, 2011
I am using a cisco 3750 in my network as a gateway, and above it I use a squid machine for caching my internet. My network is like this:
Basically I have two VLANs on my network which are VLAN10 and VLAN100, VLAN10 is the cooperate network of my office. VLAN100 is the management VLAN which i use for the switches. I keep the squid as well the client in VLAN10.
squid (192.168.1.50)---->cisco 3750(192.168.1.123)---->Distribution Switch(cisco 2960)---->client PC (192.168.1.5)
I have done nating on squid and internet is working pretty fine when I use the client gateway as the squid, but when I use the cisco 3750 as my gateway after adding route maps for forwarding the internet traffic coming to the cisco 3750 to squid it disconnects me from internet as well I cannot even reach the switches from the corporate network. These are the only Lines I used for the routing:
!
route-map proxy-redirect permit 10
match ip address 110
[Code]......
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Dec 8, 2011
I have a quick query which i need ratified before proceeding. I have the following scenario -
Two Cisco 3750v2 switches with stackwiseISP allocated block of /26 (64 addresses)8 customers each with a VLAN and SVIInternet facing VLAN and SVIDefault route to ISP router Lets say the ISP has given me the network range 10.10.10.0/26 (we'll assume this is routable on the internet for the purposes of this example) and a default gateway to the internet of 10.10.10.1 within this range. I have configured a public facing VLAN as follows -
VLAN 300
name PUBLIC
int VLAN 300
IP Address 10.10.10.2 255.255.255.252
I have then created a default route as follows -
ip route 0.0.0.0 0.0.0.0 10.10.10.1
With this configured, the switch can successfully route upstream to the internet with no problems. I have then moved onto the customers and depending on what service they have purchased, I have subnetted the 10.10.10.0/26 range into smaller subnets. See as follows -
Customer A - 10.10.10.4/30
Gateway IP - 10.10.10.5
Useable IPs - 10.10.10.6
Customer B - 10.10.10.8/29
Gateway IP - 10.10.10.9
Useable IPs - 10.10.10.10 - 10.10.10.14
This continues for each customer depending on how many IP's the have purchased. I have then assigned these IP ranges to a customer VLAN and SVI as follows -
Customer A
VLAN 10
name CUST-A-VLAN
int VLAN 10
ip address 10.10.10.5 255.255.255.252
[code].....
It is then up to the customer as to what equipment they use and how they NAT or firewall their internal networks.
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Nov 17, 2011
I have a typical LAN environment that spans across a large warehouse. I have done a lot of redesigning of the environment to satisfy the need for a disaster recover plan. I now have created a LAN with multiple v lans and must also connect all the access layer switches back to the core switch where the servers are.
I was thinking of something simple such as Port channel of 2 Gbps across the backbone and simple floating static routes . I have then moved my wan access link to a 3750 and implemented routing a CEF at each of the 3 core switches (blue). My question is more of design.
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Dec 10, 2012
Which is the best routing method for PBR? is it fast switching? If it is, how can I enable It in my 3750?
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Mar 14, 2013
i'm desperately trying to get LACP working over a dot1q Tunnel. The "Service Provider" Switches are two 4506-E Switches with SUP7-E connected via a 10G Link, running on cat4500e-universalk9.SPA.03.03.00.SG.151-1.SG
sample config:
dot1q tag vlan native
interface GigabitEthernet3/1
switchport access vlan 2001
[Code].....
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