Cisco Switching/Routing :: Sharing Internet Access Through A 3550 With 2 Vlans?
Apr 27, 2013
They have a locked Cisco Router which is from the ISP and its confed on a fa 0/0 interface to share Internet access on the network. The ip on that interface is 195.198.11.217 255.255.255.252 and i tried it with a PC (set my personal ip to .218 and entered their dns info (195.67.199.27) and it is working. The question is now. My friend found a 3550 laying around and since the ISP wont let them conf their router he wants to use the 3550 to create 2 vlans with internet access and without access to eachother. Vlan 10 for the desktops and Vlan 20 for the wireless (Moving on to some netgear wireless switches) How would you configure the 3550 for this to work?
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Jun 12, 2012
We have cisco 3550 switch i have configured 3 vlans in this switch vlans are not able to accessing internet
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Feb 22, 2012
I have a small cisco switch cluster (seven different 2924, 3524cisco switches) with 3550 as a cluster control which does all the inter vlan routing that works fine.
This cluster is in semi production PBX interop testing lab. This is a closed network without internet access and not connected to our corporate network.However now I have to add this capability so some equipment in the lab can get Microsoft updates over the internet.
I've created a port on a 3550 (fa0/19) and connected it to another network that has internet access. It picked an ip address and when I'm logged in to the 3550 I can ping hosts on the outside network. However I can't ping any hosts on that network from any hosts that are connected to my vlans.I've tried a few different things, but still can't make it to work.
Here is a short version of my 3550 configuration:
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log datetime
no service password-encryption
[code]....
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Apr 5, 2013
i am trying to set up a cisco 2950 with a vlan to seperate all of the pos machines on the network (4 of them) from all other machnes in the building (3 hard wired and wi-fi). i was going to use vlan 1 as a trunk to allow internet access to go from fa0/1 to both vlans (vlan 10 and vlan 20). i have read things about the acl having an explicit deny at the end, so i'm thinking that is my problem. i am testing it at my house before deploying it to the network. i have 1 laptop setup with an ip of 192.168.0.50, and the other is .60. my router is 192.168.0.1. i have the ethernet from the router plugged into fa0/1, the 1st laptop on fa0/2 and the other at fa0/3. before i set the vlans up, i checked the communication by just plugging them in and trying to ping, they could both ping each other, the router and 8.8.8.8. when i finished setting up the test vlans, they could not ping each other(what i wanted) and laptop 1 can ping the router, and 8.8.8.8. laptop 2 cannot ping anything.
the only thing i did was create vlan 10 and 20, set port fa0/2 to vlan 10 and no sh, fa03 to vlan 20 and no sh, fa0/1 to vlan 1 and no sh. then i did switchport mode trunk on fa0/1, and switchport native vlan 1. this seems to be how i was supposed to do it, but it's been a while since i have worked with switches. i'm sure it's simple, but after searching the internet and poring over my cisco books for 5 hours, it is turning out not to be the case. here are some details:
greenhouse#sh int fa0/1 switchport
Name: Fa0/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
[code]...
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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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Apr 7, 2012
My problem is that I have a Cisco 300 series small business switch with multiple VLANS each one with an IP address and two or three ports assigned to each VLAN. I have an E3200 wireless router that I want to use to use to share internet on the switch. All of the VLANs are reachable from the other VLANs and I've put a static route on the E3200 so that I can reach the VLANs from a machine connected only to the router. But I can't reach machines on the otherside of the router or get to the internet from the switch.
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Oct 9, 2012
I have a test switch (Cisco 3550) that I want to set up with 6 Vlans and 2 trunk ports. I want to be able to access a virtual server conected to the trunk ports from the switch ports. Ports Fa0/1 to 8 are in a vlan port fa0/9 to 16 another vlan etc. Ports Fa0/47 and 48 are the trunk ports. This is a lab environment so the the switch is the only device being used.
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Mar 5, 2013
I have problem with IPV6 connectivity, i have two Cisco 3550 switch and they are connected over a trunk link. The ios is c3550- ipservicesk9-mz. 122- 44.SE6 , I have configured vlans on both switches and i numbered one vlan to vlan 91 ,they can ping each other when i configure ipv4 on both vlans so trunk link is functional, but when i m using IPV6 they can't ping each other!! they can only ping their own ip address not each other. [code]
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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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Mar 16, 2013
i have one SF300-24p switch where i setup some Vlans and echolife hg8245 ONT router to access internet. the diagram is the following
VLAN1 (Subnet of users) -----> Switch SF300-24p
VLAN2 (Subnet of users) -----> Switch SF300-24p
VLAN3 (HG8245) -----> Switch SF300-24p
VLAN4 (Servers) -----> Switch SF300-24p
i want to control access to internet on VLAN1 and VLAN2 (access on VLAN3), while providing access to VLAN4.My problem is in connecting to internet, i can't find a way to "route back traffic to VLANs 1 and 2 since HG8245 don't seem to provide proper static routing ON LAN interface. Maybe without resorting to changing the HG8245 router ?
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Apr 16, 2012
I am trying to setup VLAN's in the company I work for and I am almost there but missing the part when the internet works.I have an SG300 as a L3 Router IP 192.168.0.93.I have created VLAN20 and VLAN40 Assigned VLAN20 192.168.2.1 and VLAN40 192.168.4.1
The static routes have been created and a default router going to the Sonicwall firewall at 192.168.0.1.Port 24 is configured as Untagged VLAN1, Untagged VLAN20 and VLAN40 in trunk mode and going to the Sonicwall NSA 2400. [code]
Working to move all 192.168.0.x network off of VLAN1 and move it a management switch.I have DHCP helper on pointing to the DHCP server.Both VLAN's once the DHCP server is configured to Gateway 192.168.0.93 can get an IP from the correct subnet either 192.168.2.x or 192.168.4.x
All PC's are getting a GW IP of 192.168.2.1 pr 192.168.4.1.All test PC's on both VLAN's can ping each other and any server with the correct GW.When I try to ping google.com or open a web page and try google.com it times out.
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Feb 23, 2012
I have configured vlans in 3560G switch but vlans notable to accessing Internet
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Feb 17, 2013
We need to give differentiated internet access to three VLANs. Each one of this VLANs is used for totally different purposes, so traffic between the VLANs is not allowed. Each VLAN has its own internet access provided for the data center using one fast ethernet connection.
We're thinking about using cisco 2911 for Internet access, VPN and firewall. I suppose that best option for VLANs is using Catalyst 2960S or a swithing module for the 2911, but these two options are too expensive for us. We're thinking about using swtiches from the SB series (maybe a SG-200).
We're totaly newbies to VLANs so we have many doubts. This are our questions:
1) The 2911 has three on board ethernet interfaces; we have three VLANs and three internet connections, so we need to use HWICs to get three more ethernet ports. That's right?
2) We need three HWICs or there is some kind of HWIC with more that one ethernet interface?
3) The routing solution is to assign static routes in the 2911 for each interface connected to a VLAN through a 2911's interface connected to internet?
4) Simply connecting three different router interfaces with three different switch ports, each one of them assigned to one of the three different VLAN, are we going to get internet access for all devices in those VLANs? or do we need to configure something else like trunking, VSIs...?
5) Can we achieve our goals using the SG-200 switch?
6) We have the chance to use older routers, is this possible? We're specially interested in knowing if a 1841 or a 2801 router could be used for this setup.
7) This is not a production environment so we can use refurbished equipment.
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Aug 3, 2012
I have a Cisco C3560CG which is running C3560c405ex-UNIVERSALK9-M), Version 12.2(55)EX2.The switch has vlan 1 and vlan 50 configured, vlan 50 should have access to a limited number of host in vlan 1.The following acl has been applied on the inbound to vlan 50:
10 permit tcp 10.16.30.0 0.0.0.255 host 192.168.15.243 eq 137 138 139 445
20 permit udp 10.16.30.0 0.0.0.255 host 192.168.15.243 eq netbios-ns netbios-dgm netbios-ss 445
25 permit icmp 10.16.30.0 0.0.0.255 host 192.168.1.243
26 permit ip 10.16.30.0 0.0.0.255 host 10.16.30.254
30 permit ip 10.16.30.0 0.0.0.255 host 192.168.15.254
[code]....
I sure the above would work, but for some reason some of the packet counter are not incrementing but the traffic is being blocked. But I would like to see the counter increment.Also I have that I may beed to use VACL wouls this be the case?
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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 192.168.2.0 (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, 172.16.0.0 255.255.248.0?
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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Jan 9, 2012
I have a layer 3 switch, 3550.I have several vlans on there just for playing around with. One of the vlans, has a vonage linksys box attached to it with a UK number attached. From time to time telemarketers call at 03:00 in the morning, this as I'm sure you can imagine is not much fun. The linksys box gets 192.168.3.3 as it's ip.The switch is connected to a non cisco router at 192.168.0.1
interface FastEthernet0/24
no switchport
ip address 192.168.0.2 255.255.255.0
I was thinking a time based access list would work best I have tried several variations but the phone still rings. I have tried access-list 1 deny host 192.168.3.3 permit ..... and more extensive lists but the phone still rings. I have not applied the time-range yet, so that's not the problem.I have applied the list to the vlan interface and to fa0/24 but it's not working.
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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(192.168.3.254)-->(192.168.3.1)1811W Router(192.168.2.254)-->(192.168.2.1)3550(interface vlan 10 - 10.0.1.254, interface vlan 192 - 192.168.1.254)--trunk-->2950
1)Configured 3550 as layer 3 switch and create a default route to 192.168.2.254
2) Configured 2 static routes(for 2 vlan range traffic) and one default route to 192.168.3.254
3) ip pass through is not configured yet, still the public ip is configured at the isp router
1811 static route configs
------------------------------------
Ip route 0.0.0.0 0.0.0.0 192.168.3.254
Ip route 192.168.1.0 255.255.255.0 192.168.2.1
Ip route 10.0.1.0 255.255.255.0 192.168.2.1
3550 static route config
--------------------------------------
Ip route 0.0.0.0 0.0.0.0 192.168.2.254
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 192.168.3.254 and any of the public ips(internet).
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Jul 4, 2012
upgrading our small office network. We currently have about 75 employees with probably 125 devices on the network. I'd like to create about 10 vlans for the different departments and then configure intervlan routing as needed. Currently we have all unmanaged switches and it's just a huge broadcast storm on the network. We are upgrading our Cisco 800 router to an ASA5505 sec. Plus license. I need some recommendations on switches. Of course, this needs to be done as cheap as possible.... Is there a way to use the ASA to configure all the vlans and intervlan routing and access lists and use a cheaper switch to provide the access layer to hosts?
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Jan 23, 2013
I have the following config using a Cisco 1921. I am trying to get devices on the the native VLAN to get internet access via the gateway x.x.x.73.Any thing being routed from the other Vlans 15/20/30 can get access, but nothing from an internal IP address. Is there something I am missing.
The Xs replace the same 3 octets for each interface.I am trying to route from VLANs 15/20/30 to see VLAN 5. I have tried a few things, in terms of adding extra ip routes, but can't get anything to work. Each of those Vlans have another router on the other side of them, which I have also tried adding ip routes too, but nothing. One of the routers (Vlan15 is a Draytek 2830). [code]
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Nov 16, 2011
I have router connected to 2 3550 switches directly. 3550A and B switches are running HSRP. OSPF is running between Router and 2 switches.
From Switch B i can ping the Router Wan interface but not the internet sites. from Switch A i can ping any sites?
Switch B
3550SMIB# sh ip routeCodes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1
[Code]......
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Mar 27, 2012
I have came across this topic, and I am wondering if this images can be uploaded to any 2900 series switches or not, and if this will work as access port for more than vlans. URL...
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Jun 4, 2012
We have a network of 30 VLANS and currently all the vlans have access to everything. We are using Cisco 6509 switch for Layer3 routing.I would like to prevent some VLANs accessing the server VLANs. How can i resrict access to the server VLANs? Do i need to implement access-lists on the 6500 switch? or do i need to create VLANS on the firewall so that all traffic i filtered?
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Dec 22, 2012
I have set up a scenario for a small business and have some questions about how to manage the access between the VLANs. Is there is a better / another way to do it. See the attached picture for the topology / info.
My question is:
My switches is set up with x numbers of VLANs and a routed port (no switch port) to the ASA for internet connectivity. How is the best (or only??) way to manage the access between the VLANs? Is it ACL's on the switch?
And by "managing access" I mean VLAN 50 (public WiFi) only have access to the internet, only management servers have access to management VLAN, Client VLAN only have RDP access to server VLAN and so on. Is there any way to do this in the ASA (or add another (gigabit) router to the topology)) or it the only way to have lots of ACL's on the switch itself? I have thought about "router on a stick", but then I imagine there will be a bottleneck between the switch and the ASA?
(Equipment is 2 x 3650G, ASA5505, AP1252 - see attached file).
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Mar 18, 2013
I've got a 3750x stack set up as my core switch (only a small-ish environment) - I'm shortly going to be deploying an enterprise wireless network with Corporate and Guest SSID's. I'm going to be putting all traffic from the Guest SSID in VLAN 244, and don't want it to have access to any of the other VLANs (1 (Legacy Eqpt), 4, 8, 12, 16, 20, 24, 28, 32, 248 & 252).
IP ranges for all the main VLANs are:
1: 10.0.0.x/22
4: 10.0.4.x/22
8: 10.0.8.x/22
12: 10.0.12.x/22
16: 10.0.16.x/22 etc etc (you get the pattern)
I'll probably give Guest traffic (VLAN 248) the IP range 192.168.10.x/22 (not because I NEED that many addresses, but it's easier for everyone to remember/understand if I keep the subnet masks the same all round). However I also have a CCTV VLAN (252) which already has the range 192.168.0.x/24, which some people in other VLANs WILL need access to.
So my question is: What is the syntax for the ACL on my 3750x (IP base - 15.0.2) to prevent traffic from VLAN 244 gaining access to any of my other VLANs. I'm making a broad assumption here that a layer 3 switch is perfectly capable of supporting that function? I need ALL the syntax for setting up ACL's - I've never done it before
My gateway device by the way is 10.0.4.1, and I do have inter-VLAN routing set up on the core switch (obviously).
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Feb 20, 2012
We have a network of 30 VLANS and currently all the vlans have access to everything. We are using Cisco 6509 switch for Layer3 routing.I would like to prevent some VLANs accessing the server VLANs. How can I restrict access to the server VLANs?Do i need to implement access-lists on the 6500 switch? or do i need to create VLANS on the firewall so that all traffic i filtered ?
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Mar 31, 2013
I am not sure if what I am trying to accomplish is possible. On my internal network I have the following VLANs setup (102, 104, 106) and they map one to one to a subnet (ie: 102 = 192.168.102.0/23, 104 = 192.168.104.0/24, etc).All interVLAN routing is done on a 3560 via vlan SVI. Connected to the 3560 via a routed port is a ASA 5510. The routed port has IP 192.168.100.1 and the ASA interface on the other side of that routed port has IP 192.168.100.2. I use 802.1x on the wired network to assign users (based on their department) into a specific VLAN. I want to extend this concept to Remote VPN access. Therefore I setup multiple Group Policies (policy is applied based on an LDAP attribute) where each policy defines a different DHCP scope. This has successfully allowed me to login wtih different users who get assigned to different Group policies and they obtain the correct DHCP IP address from the internal DHCP server (ie: an engineering person logins remotely and gets an IP in 192.168.102.0 range). However the issue (and as I was planning this out I knew this would come up) is that traffic can be routed out from the VPN client to its destination but there is no return path.
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May 20, 2013
PCs --> SG500(4 vlans) --> rv042 --> Internet..vlan 1 is able to reach the internet..vlan 2-4 cannot reach the internet, but can reach vlan 1.
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Jan 29, 2012
Here is what I have. Windows Domain Controller running DHCP with configured scopes.I have one ASA5510 And 4 HP Procurve switches with VLANS preconfigure from vender.
Here are my DHCP scopes/VLANS:
VLAN1 -Default 10.2.x.x/17
VLAN201 -DHCP 10.2.201.x/24
VLAN202 - WLAN EMP 10.2.202.x/24
VLAN203 - WLAN Guest 10.2.203.x/24
VLAN 252 - MGMT 10.2.254.x/24
Here is how I configured the DHCP Scopes:
Changes needed to make to the DHCP Server (AUSPDC) in order to get things working with the new switches.
1) Configure 3 new DHCP scopes on your DHCP server.
a) scope for 10.2.201.x/24 to serve LAN employees and give them a gateway address of 10.2.201.254.
b) a scope for 10.2.202.x/24 to serve WLAN employees and give them a gateway address of 10.2.202.254.
c) a scope for 10.2.203.x/24 to serve WLAN Guests and give them a gateway address of 10.2.203.254.
I just upgraded and decided to go with the VLAN configuration. None of my VLANS can get out to the internet or each other due to I think My ignorance in configuring the firewall.The PC's are getting proper IP address but they cannot get out or to the other VLANs. I tried to duplicate what is working for VLAN1 but it is not working.
Here is my config.
Result of the command: "show running-config"
: Saved
:
ASA Version 8.2(3)
!
hostname CiscoASA
domain-name hand.local
enable password 1FVULuGal5s1/ADt encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
[code].....
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Dec 1, 2011
We have cisco 3550 switch i have configure 3 vlans in this switch. i have enable routing between this vlans but vlans not able to communicating with each other.
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Feb 1, 2013
i have a cisco catalyst 1900 & i like to share internet among 15 PC in my lab they all are connected to the switch through a patch panel should i connect my ADSL Modem to the switch, the switch is running on default config.
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Dec 26, 2012
I am trying to setup my 3550 layer 3 switch to do hand out dhcp addresses for different vlans. It is connected to my router address 192.168.1.1. I setup a new vlan 3 and the dhcp pool.. The client gets a 192.168.3.2 address but am not able to ping the router and other clients and get out to the internet.
Here is the config that I have. I deleted the other ports because I am not using them. The vlan 3 client is on port fast Ethernet 0/17 and the router is connected to the fastethernet 0/1.
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
[code]....
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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 10.1.1.1
*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 10.1.1.1, 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
[code].....
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Jul 24, 2007
Does Catalyst 3550 switch support inter vlan routing ?
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