Cisco Switches :: VLAN Tagging ESW-540 And 3750g
Aug 19, 2011
I am currently tasked with setting up a network, pretty much from scratch, that requires some fairly hefty VLAN deployment. My hardware on hand (already existed so can't can't change anything easily) 5x ESW-540-48 Switches, 1x3750g switch, 1x2811 router. I don't believe the router should be required as the 3750 is capable of intervlan routing. [code]
Now at one point I actually had the VLAN's *working* in that I could specify an IP address and could ping to and from it! However DHCP wasn't passing despite numerous attempts with DHCP relay and IP-Helper configurations.Also I was having issues with VLAN 1 as the native VLAN, the ESW switches don't allow you to do much with them, as they 'weren't created by the user'. So tried switching that out to VLAN11 also but with very little success there (I had to change the native vlan on all trunks to VLAN 11)All the 10.x.x.x addresses need to be able to communicate with each other.All the ESW switches need to be able to handle their respective VLAN's as well as VLAN 1 (for Printers and wireless access points distributed around the building).
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May 18, 2011
I need some assistance in setting up VLAN's (802.1Q) accross two switchs, I want the same 2 vlan's on both switchs, how do i configure them to be connected and pass both vlan's traffic.VLANs from firewall are tagged at 3 and 8.Single port out from the firewall.The first switch is simple enough, port is connect at port 52 and configured from both vlan's then the individual ports are either on one or the other. The question is how do i connect the second switch so that it can also do both vlans. Assume I connect switch1 at port 51 to switch 2 port 52. Do I configure both ports to be on the same VLAN's. or do i setup LAG's.
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Nov 23, 2011
We are having one HP core switch and VLAN is configured on it. Four Nortel BES1010(24port) switches will be connected to this HP switch. We need to configure the VLAN tagging in the Nortel switches in order to make deices connected to nortel switches can communicate with devices in the VLAN.
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Jul 29, 2012
Unfortunately I do not remember the model and the switch is a couple of hours away without remote access.I have 4 vlans on a procurve switch.
VLAN1 - Network Devices (Server, printers, WAPs)
VLAN100 - Admin (Office workers)
VLAN200 - Teachers
VLAN300 - Students
There is a server doing DHCP. There are 4 ranges of IPs 1 for each VLAN.
The router is on Port 44. VLAN 1, 100, 200, 300 - Tagged
The Server is on Port 46. VLAN 1 - Untagged
The WAPs are on Ports 1, 11, 31 VLAN 1, 100, 200, 300 - Tagged
All other ports are on VLANs 100, 200 or 300 - Untagged
The WAPs all have VLANs 100, 200, 300. Each VLAN on a different SSID.
I have IP helper with the server IP on VLANs 100, 200, 300.
There are IPs from the different subnets on their respective VLANs in the switch.
The gateway for each subnet is on a different subinterface on the router.
The router is a linux box. (Untangle)
The WAPs are not able to talk to the server, therefore no computers on the wireless networks can get an IP.The server can only talk to the router if I change port 44 to untagged.What combination of tagged and untagged ports do I need to make everything talk?
Do I need to put the VLANs on the subinterfaces of the router?
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Sep 28, 2012
I'm Confused from the fact that Vlan tagging is done at access port and trunk port always gets tagged packets (untill its case of native vlan).But I still believe in other fact which says tagging happen only when a frame hit the trunk port which means trunk port gets untagged frame and tagging is not possible at access port.
Would like to know where actually this tagging happens ?
and also which command we can use to encapsulate 802.1q protocol to access port ? The way we do at trunk port is #switchport trunk encapsulation dot1q Is the above command applicable for access mode also?
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Feb 13, 2012
I have a sf300 with (2) vlans (1) ] vlan for data and vlan (100) is my voice vlan I have Vlan (100) tagged traffic, and my VoIP pbx as an access port only to vlan (100) all other ports are trunk ports with vlan (100) tagged and vlan (1) untagged traffic. I get no outbound audio on calls I can call out hear them fine they cant hear me. I am wondering if my tagged traffic leaving the phone is being striped and if so were. I have CDP turned off.
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Sep 16, 2012
I have a 3750G switch in my production network that only has VLAN 1 on it. All ports are in a default state and VLAN 1 is disabled. The switch is passing traffic but shouldn't having the default VLAN shut down cause the ports not to pass traffic? If I start to create VLANs will that cause the switch to stop passing traffic?
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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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Oct 25, 2012
we have a base license ASA 5510, and been trying to get ICMP working to check that we're routing and not hitting any NAT translation. We have a VLAN280 setup to ISP for VPN link to remote site and another VLAN281 for internet access for internal users.
Users can browse internet from (name _inside interface e0/1 access port) which is fine. When I do a ping to remote office through the VPN I get a response pinging from VLAN280 name VPN_Link. When I do a ping from name inside interface I don't get a response both are security level 100 with same-security-traffic permit inter-interface configured.
Config:
!
interface Ethernet0/0
speed 100
no nameif
[Code]....
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Feb 14, 2012
I rencently bought the E4200v1 router, to be wired together with my WRT610nv2 to form gigabit network for different floor network.However with the recent installation of fiber to home network offered by my local ISP, I would need router that capable for performing vlan tagging (500 for internet & 600 for IPTV).Would like to know if Cisco have any development plan to enable the VLAN option for:-
1. E4200
2. WRT610nv2
At the moment, I'm still stuck with the provider "home-made" router which lacks of Gigabit & dual band wireless.
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Oct 30, 2011
Having an issue getting my DMZ vlan working. Running my ASA5505 and i have configured e0/2 for DMZ w/ VLAN ID 3. Connected to my 2716 on port2.Inside e0/1 w/ VLAN ID 1. Connected to my 2716 on port1.
I am trying to get my DMZ Vlan to ports3&4 (LAG1) but when i assign the LAG group to PVID 3 i lose connectivity on VLAN1. I want to send both VLANs to that host because the teamed adaptor is used for Hyper-v Network Switch.
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Jul 5, 2012
I have a 2960 switch connected to another. The I need to verify that vlan0010 on one switch is forwarding tagged traffic between the other switch it is hooked up to through the Gi0/1 port. How do I verify this? I have a server that's multihomed (Broadcom) on the other side an it is supposed to be on this vlan with one of it's network interfaces. We had a pwer outage and now it cannot communicate on this vlan. However, everything else on the vlan can reach all the other nodes accept this server in the front of my building. All the devices in the same room are linked to the same switch which has one port (fa0/17) on vlan0010 and can ping eachother just fine. The server is hooked to port 24 on my server room switch and Gigabit port one goes to a fiber converter all the way to the back. It then gets converted from fiber to cat5e again and links into the switch (2960) in the backroom.
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Mar 18, 2012
I'm a little stuck with a 4400 7.0.220.0 + RAP 1550 + MAP 1260 Ethernet bridging issue. I'm using the VLAN tagging functionality and I'm finding that periodically a VLAN that I've tagged on the MAP will deregister from the backhaul and stop passing traffic. If I go into the Mesh tab on the MAP, select the wired interface, remove the VLAN from the list of tagged VLAN IDs and then add it right back to the list, its starts passing traffic again
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Dec 13, 2012
We have a problem with CDP packets on sent by our Cisco 6509's. Unlike our other Cisco switches (4948G, 5020, etc.), the 6509 tags administrative traffic on the native vlan. As a result the CDP packets are sent with an 802.1Q header with a tag of 1. The other switches send the CDP packets untagged on the native vlan. This causes problems because we have non-Cisco devices in our lab that also receive and send CDP, but they do not process the packets that are tagged by the 6509. They see the packets from the 4948 and 5020 just fine.
How can I disable the administrative native vlan tagging on the 6509? Here is the current setup:
nwkdev-6509-1#show vlan dot1q tag native
dot1q native vlan tagging is disabled globally
nwkdev-6509-1#show interfaces gigabitEthernet 1/9/1 switchport
[Code].....
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Jan 14, 2013
I've been experimenting with the 'vlan dot1q tag native' command on a switch and it seems as though tagging the native vlan breaks vty access to my access point.With the 'vlan dot1q tag native' commnand applied, I lose management connectivity to the AP with 'no vlan dot1q tag native' applied, connectivity is restored. Why is this? Is it safe to say that one can access the AP via vty lines using ONLY untagged packets?
SWITCH
Model: WS-C3560G-24PS
Code: c3560-advipservicesk9-mz.122-46.SE
--Abbreviated CONF
vlan dot1q tag native
[code]....
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Feb 26, 2013
Region : Malaysia
Model : TL-WDR4300
Hardware Version : V1
Firmware Version :
ISP : Maxis
I bought the TL-WDR4300 almost 6 months ago using it on my TM Streamyx broadband service, it worked perfectly and this is indeed a very good product very reasonably priced too Kudos to TP-Link. The thing is shortly after purchasing it, I moved to Maxis Home Fibre Internet (more bandwidth). Following the ISP change the router has since went back into the box and had been there for 5 months now. This is because without the VLAN tagging feature or a Maxis mode, it is currently incompatible with Maxis Home Fibre Internet and will stay that way.I understand this is by no mean TP-Link's fault but I and many other WDR4300 owners on Maxis, if TP-Link could look into ENABLING VLAN TAGGING FEATURE/MAXIS MODE on this device. This I am sure would work with TP-Link sales as there are not many routers out there with this feature set and price range that could work with Maxis Home Fibre Internet.
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Jan 22, 2012
We have a server that we remove from the rack. The only role it has is to give out DHCP on the wireless network. I tried enabling the built in DHCP server on the Airespace 4112, though a Catalyst 3750G, but I dont get an address when I'm connected to the wireless network even though the range is enabled. If I set an static IP on my wireless card I can access the network. I also tried enabling DHCP on a Sonicwall that is connected to the Catalyst 3750G.
Do I need to link the DHCP scope to the wireless network? Is there anything on the switch that would be blocking DCHP since it on a VLAN? I have the last four ports in a VLAN for the AP's and the internet connection to the Sonciwall.
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Mar 2, 2013
I'm creating 3 vlans, one private ip addresses and the two for two blocks of public ips. After creating them devices on the same network are able to talk to each other on the private IP but not on the public ips.
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Feb 20, 2013
We have 3 VLAN in our cisco 3750G switch. VLAN 1 10.1.0.0/24 for domain network, VLAN 2 10.2.0.0/24 for student and VLAN 3 10.3.0.0/24 for public. We have one printer 10.3.0.206 in the VLAN 3 and want to allow student server 10.2.0.253 in the VLAN 2 to access the printer. How can we configure access-list? Here is current configuration.
ip access-list extended publicaccess
permit icmp any any
permit ip any host 10.2.0.253
permit tcp any any established log
deny ip 10.3.0.0 0.0.0.255 10.1.0.0 0.0.0.255
deny ip 10.3.0.0 0.0.0.255 10.2.0.0 0.0.0.255
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Feb 16, 2013
There are 5 VLAN's and all can communicate through all the different subnets, but VLAN5 can not communicate to the RVS 4000.
VLAN Smart Port set to switch and router - this is not working What Smart Port configuration should be set up to talk to the LAN port on a RVS4000?
VPN is set up and connected, but when trying to connect to the client can not connect to remote networks.
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Jun 12, 2012
We have to connect two 3750G switches to some HP machines. Those machines have several network interfaces, which are going to be configured in several bondings. The load balancing mode they want to configure is mode 6, alb. We have investigated and it is: [code] Receive load balancing is achieved through ARP negotiation.We would like to know if it is supported to be connected to a 3750G an if an special configuration is needed.
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Feb 7, 2013
We have the 3750G with the IOS version 12.2(35)SE5. Does this IOS version and switch support the TCP Window Scaling detailed in this doc? The doc says Release 12.2(8)T. And I don't see the 3750G or the 2960G platforms listed in the doc.
[URL]
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Jan 15, 2012
Has any come across show ver memory details on 3750G-48PS as below, One of our Catalyst 3750G running software 12.2(44)SE2 shows unexpected DRAM as below:
cisco WS-C3750G-48PS (PowerPC405) processor (revision F0) with 0K/12280K bytes of memory. This would equate to around 11MB memory which does not seem right... Is it a known IOS bug?
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Jul 18, 2011
I have issue with connectivity 3750G with Dlink Switch, it cannot connect to non-cisco switch with fiber , But CISCO to CISCO switch it shows connectivity. My question is that is there any configuration on Cisco 3750G switch to connect with non-cisco switch through fiber (SFP) ?
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Jan 23, 2013
I have faced a problem with configuring Cisco 3750G series switches as Sever farm switches with redudance.
servers have 2NIC (1GBps) and both are bridged for redundant connections.In both switches all ports get green coluor except one port on Secondary SW. I saw some Spanning tree block port status on that switch.when i type Show cdp neghbor command on switch i can see other switch through a server connected port. Also Spannig tree root bridge election is occured through that port . Simply i need to configure both switches to pass traffic through there uplinks them selves.. but it seems like Secondry switch pass its traffic through primary switch ( i think according to STP ) usinginterconnection of bridge port of a server. [code]
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May 12, 2011
We are trying to config vlan 10 for data and vlan 20 for voice on the same port - port 1 of swtich SF300-24P to run both data and voice on different vlans.Do I have to add vlan 10 as an untagged vlan to port 1 and add vlan 20 as an tagged vlan to port 1?If I do not want to assign the native vlan 1 to port 1, how can I remove it ? The GUI page - assign VLAN to port does not allow to remove it.Aslo, what mode shall I set up on port 1? General, trunk or access ?
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Oct 16, 2012
We have a stack of 4 Cisco WS-3750G-24TS with Sw Version 12.2(52) SE and giving weird errors:-
-Traceback= 17211C8 16FA4C0 16FA4FC 18625E4 18608D4 286A850 283E6FC 282EDF4 2859BBC 1B2EDA8 1B25878
Oct 17 22:26:48 AEDT: %SNMP-3-CPUHOG: Processing GetBulk of lldpRemEntry.7
Oct 17 22:26:50 AEDT: %SYS-3-CPUHOG: Task is running for (2098)msecs, more than (2000)msecs (8/6),process = SNMP ENGINE.
-Traceback= 172108C 17211CC 16FA4C0 16FA4FC 18625E4 18608D4 286A850 283E6FC 282EDF4 2859BBC 1B2EDA8 1B25878
Oct 17 22:26:51 AEDT: %SNMP-3-CPUHOG: Processing GetBulk of lldpRemEntry.7
Oct 17 22:26:53 AEDT: %SNMP-3-CPUHOG: Processing GetBulk of lldpRemEntry.6
Oct 17 22:26:53 AEDT: %SYS-3-CPUHOG: Task is running for (2097)msecs, more than (2000)msecs (1/1),process = SNMP ENGINE.
What are these errors is this a bug in the IOS
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Jan 20, 2011
I have a Netgear GSM7248R switch with 5 different Vlans including th management Vlan. Each of the vlans are connected to my layer 3 switch for routing. I want to access the management vlan form any of my Vlans so my layer two switch can be detected by my snmp manager.
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Apr 6, 2013
I have some problem in my small network.I have 2 SF-300 48 port switches and connected to 847 router for intervlan routing. I configure 7 vlan in SW1 and uplink to SW2 with trunkport.
The problem is that if i used default gateway for users ip address of interface (vlan interface) is ok. I bring two adsl modem and connected to vlan1 and vlan2 for internet access. When i connected this two modem vlan 1 and vlan 2 are not going to access other vlan 3,4,5,6,7 and wise versa.
vlan1 users getting default gateway from adsl modem ip, how i can permit this two vlan should to access other vlan 3,4,5,6,7 and 3,4,5,6,7 should access to internet also.
[URL]...
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Feb 5, 2013
We have a Cisco 3750G Core switch which has physical connections, each configured as trunks to two HP Access switches. The client who uses these access switches would like to put a link between the two, but this would create a loop.
------- Core Switch -------
| |
| |
[Code]....
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Nov 3, 2011
I have a 2x Cisco 3750G switches (Stacked) that are part of an IP Video Surveillance System .All network is set to 1 VLAN (VLAN 1 default).The Cisco SWs ( Core ) are configured with IGMP Querier + Snooping .Connected to the Cisco SWs are 4 Fiber Rings(Loops) for redundancy . RSTP and IGMP Snooping are enabled on all the network SWs .Network Architecture Figure :
When all Fiber Rings (Loops ) are connected , the Cisco and Ring SWs spanning-tree tables show the blocked and forwarding ports properly .I am able to connect all my IP Cams + Encoders to the Ring SWs and connect my Servers + WorkStations to the Cisco SWs to record and view the multicast ip streams .All streams from Rings 1 ,3 and 4 are getting normally to the Servers + WorkStations through multicast ( IGMP Snooping are filled correctly on the Cisco and non-Cisco SWs ) . All multicast streams are joined normally except for Ring 2 .The Multicast streams passing through Ring 2 will operate normally for around 2 hours then after that the Fiber SWs begin to flood their multicast traffic causing the cams on the same switch to drop off the network .
I checked the Configuration of all the SWs on Ring 2 but all are are the same .
What is weird is that I have to set all the streams to unicast to stop the flooding just on Ring 2 (All other rings are not affected ) then after some time if I enabled a video multicast stream on one of the SWs of the Ring it will be streamed properly to the Servers + WorkStations ( All IGMP tables along the way will be filled properly ) then again after 2 hours or so , the flooding will start again suddenly and all IGMP table entries for the SW on Ring2 will be empty . No problem occurs on the other Rings which have more multicast streams .
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Oct 6, 2011
now we have 2 switches: SF300-24..on one SF300-24 we config it at layer 3 mode with VLAN configuration same as following [code] And we use port 26 on 2 switches SF300-24 is trunk mode then we connect both SF300-24 switches.But on SF300-24 layer 2 cann't inderstand VLAN from Sf300-24 layer 3..How to config VLAN on 2 switches SF300-24 Layer 3 and SF300-24 layer 2?
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Aug 7, 2011
Any snmpset commands to add, modify and delete vlan table entries on SG300-10 switches? I checked url... however this information is apparently only valid for catalysts. The latest firmware is installed and the provided MIB files are used.
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