Cisco :: Switchport Trunk Encapsulation Not On Every Switch?
Jul 19, 2012
I've been studying my inter-vlan routing , mainly in this case routing on a stick. I noticed through packet tracer that the 2960 switch doesn't allow for the '(config-if)#switchport trunk encapsulation' command, but the L3 3560 switch will.I am very concerened about this since VLANs are a main topic. What perspective will Cisco be seeing this from for the CCNA exam, I test in 12 days. I have embedded a packet tracer screen shot for more information in case I didn't word this right (which happens all the time to everyone it seems like in NW'ing now and then if not alot).
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Jan 9, 2012
I'm setting up a new 4900m running cat4500e-ipbase-mz.122-53.SG5.bin. I'm attempting to create Port-Channels as a Trunk for uplink to a 4503 running cat4500-ipbase-mz.122-37.SG1.bin.When I attempt the command "switchport trunk encapsulation dot1q" it errors out.
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Feb 19, 2012
I am looking at upgrading our 4503 to the 4507R+E. Just going through the configurations and a couple of commands seemed to have dropped off this release.
1. I can no longer specify encapsulation type on a trunk. Does the 4507 auto sence encapsulation and apply it dynamically?
2. I had dscp trust configuration as below on the 4503, whats the equivilent on the 4507?
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Nov 2, 2011
i have an issue to connect a trunk between cisco switch and extreme switch i have many vlans that i want to cross via a link between cisco 3750 switch and a Extreme Alpine 3800 switch
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Dec 8, 2011
The last few days I've been exploring options in getting rid of some old routers accross a wan connections. I have a cat 3560 to play with and I thought I would try and use the no switchport command test out routing with switch. I've got some type of route issue and I tried a few things which I thought would fix the issue but had no effect. I'll post the config and a few commands so you can see what the basic setup is.
Here we can see in the arp that it knows about both 10.7.1.2 (PC unable to ping 10.3.3.254) as well as 10.3.3.254 (ASA).I tried adding in a ip route of 10.7.0.0 255.255.0.0 10.3.3.110 as well as 10.3.3.254. Neither produced the results I wanted allowing 10.7.1.2 (PC) to ping the ASA (10.3.3.254). [code]
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Apr 24, 2012
I'm trying to configure a 2940 switch to trunk. I just can't get it to work.On the interface I have added: switchport mode trunk The default is encap for this switch is dot1q, so there is no need, or ability to add/change the encap mode. Also all vlans are being allowed by default. I still can't get any port to trunk. Need to get G0/1 to trunk, have also tried to trunk f0/6 to the switch in my office. Also can't find the command to change the management VLAN. I do not use vlan 1 for management. Can I change the Mang VLAN on this switch?
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Apr 20, 2012
1- Cisco Router
Eth0/0 : Ip address 192.168.1.1 /24 == connected my laptop of 192.168.1.2
/1: Ip address : 192.168.2.1 /24 = connected cisco swith
2 - Cisco Switch
VLAN 2 Name : Sales : ip address 192.168.3. 1 = connected computer 192.168.3.2
VLAN 3 Name : Marketing : ip addres 192.168.4.1 = connected computer 192.168.4.2
So I want my laptop that connected the router Eth0/0 Interface should access both VLAN 2 and VLAN 3 computers
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May 17, 2012
I have a 5508 controller with multiple SSID’s that are non-broadcasting. My goal is to get a 1142N to work in non-root bridge mode by accessing one of the existing WPA2 SSID’s.
I have a IDF that has a 3750 switch with multiple devices connected to it in 3-4 different vlans. B/C of fiber length restraints, I can’t uplink in a traditional way. So, my thought is I can connect a 1142N in non-root bridge mode and connect it to an existing WPA2 w/AES that’s being broadcasted by our 5508WLC. Connect the 1142 to 3750 and let it act as the trunk port for the devices on the switch.
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May 4, 2011
Is it possible to trunk a SF300 switch with a 3750 switch? If so how? Whenever I turn trunking on the 3750 port I lose connection to the SF300.
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Feb 24, 2011
Currently I have a 4510-48g HP3COM switch as a core switch for my 4 VLAN network (which I hope to send back cause it doesn't do what I wanted it to do... PBR, which is what I need to route specific VLAN's to specific interfaces on the sonicwall,.. cause sonicwall dont understand trunk or spanning tree,. meh!) This may not happen so I've dug out an old CISCO 1800 sdsl router that has 1 FE0 port and 8 other ports, FE 1-8.
The first thing I need to do is get everything to talk to each other. So I plugged the switch into it via its configured trunk port, and configured 4 sub interfaces on the router 1800 and all seemed happy as larry and working. The problem I have is I dont seem to be able to create sub interfaces on the other ports!?
[Code]...
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Sep 28, 2011
I am trying to configure a trunk between the above two devices. I like to have vlan11 on ASA. Then I like to connect a host to my switch, and have it communicate with other devices in VLAN 11 or other vlans that reside on the ASA. Below is the config that I currently have.
ASA:
ciscoasa# show run interface Ethernet0/1
!
interface Ethernet0/1
[Code].....
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May 12, 2013
It looks like pretty basic config, but it does not work. I have 1x 2602i autonomous mode AP, 1x C2960 switch (with inter-vlan routing prefered SDM template) and 1x 1841 router.
I trunk between Switch and Router works smoothly, but it does not work between AP and Switch or AP and Router.
Configuration looks like this:
AP2602i:
interface GigabitEthernet0
no ip address
duplex full
speed 100
[code]....
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Dec 20, 2011
I need to configure a pvlan trunk on DELL enclosure with Cisco Blade Switch, to permit pvlan and a normal Vlan.But, when I want to enter "Trunk" on private vlan mode, I can´t, because only has "host" and "prominiscous" mode. [code]
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Jan 20, 2013
Can I configure the Port at the ASA 5050 from Mode: access Port to trunk during the FW is running in a production area without console access ?As I know at the 5505 ist should work?
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Apr 11, 2013
Is there really any reason why you wouldn't use spanning-tree portfast on a trunk port other than a trunk between two switches? We have it enabled on all ports except for the fiber trunk between two non-stacked switches and the trunk ports connected to our Astaro firewall.I'd like to enable it on the ports to the firewall unless that would cause issues.
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Feb 12, 2012
we recently aquired a managed services job and have to do a overhaul of the vlan configs and have a whole dozen WC2948G's trunk between a set of ports as well as trunk out a LAG channel setup to non cisco equipment. the deal is the lacp-channel works properly on both ends but no routing of vlans between ports and between the lag trunk are working.
theres alot of settings in the config and im planning on clearing it and starting from scratch but before i do i want to know where my problem lies.
[code]...
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Apr 15, 2010
I have two 3560G 24 port switches. Each of them connects to some 3560G or 2950 switches. Trunks between 3560G are set as 1000/full. Trunks between 3560G and 2950 are set as 100/full. show int status also shows the interface negotiation is 100/full for trunks between 3560G and 2950. The issue is I keep getting outdiscard errors in trunks between 3560G and 2950. At 2950 switches, I see Recv-errors too. I checked all the trunks traffic. They are totally not high. Only serveal mbps. Most time even lower than 1mbps.
I googled this kind of issue online. I see it could be possibly caused by high volume traffic higher than the capacity. But it appears the traffic there is not high enough to cause this kind of issue. Is there any possiblity that could cause this problem?
The below is 3560G trunk configuration for 2950 switch
interface GigabitEthernet0/10 switchport trunk encapsulation dot1q switchport trunk allowed vlan 1-122,124-4094 switchport mode trunk speed 100 duplex full srr-queue bandwidth share 10 10 60 20 queue-set 2 priority-queue out mls qos trust cos auto qos voip trust
the trunk configuration at 2950 switch: interface FastEthernet0/24 switchport trunk allowed vlan 1-122,124-4094 speed 100 duplex full
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Jan 16, 2013
This is regarding VLAN creation on C3750E switch.I want to create new Vlan 94 on this switch and also I want to allowed same interfaces like Vlan 95 & Vlan 96. [code]
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Dec 8, 2012
encapsulation of routing protocols. Where exactly in the OSI, or TCP/IP for that matter, model does the data of the routing protocol fit into ? Is it encapsulated inside the transport layer segment payload ? So far from the I've gathered, that's where it should fit.
#####@@@@$$$$routing/procotocol/and/data/etc#####
#-Data link header and trailer
@-Network layer header
$-Transport layer header.
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Mar 26, 2012
I am trying to config a 2620 Cisco router to perform subintreface (F0/0.1) for Vlan Trunk Protocol, however when I try to configure the encapsulation dot1q, I continue to receive error massage with ^ symbol below the 'c' See below, the platform version is a 12.3(26) which should be acceptable to perform an (encapsulation dot1q). The Ethernet is a fast-Ethernet 10/100 port. I also try the ISL, I receive the same massage.
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int f0/0
[Code]....
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Mar 12, 2011
I recently purchased a Zyxel PK5000Z modem from qwest, upgrading from my M1000 actiontec. My reasoning was that port forwarding was not working as part of the router on the actiontec, and the pk saved me some money on my bill. So, what I always start out doing on modem/routers is restrict DHCP to 192.168.0.2 to 192.168.0.10, limiting the number of devices that could connect, and I don't know if that really matters or not for this problem, but figured I would throw everything out there. So....My actual problem is that now when boot up xbox360 I get a xbox360 live "nat strict" error. I have all the ports suggested for xbox, and the particular games forwarded, and DMZ turned on to the static IP I assigned to the xbox. I started out assigning a static IP reservation in the router for the xbox (the one I set on the xbox), but soon found not needing this. I ran the firmware diagnostic tool in the utilities menu and the "encapsulation test" failed, I called qwest, they have no clue, but sounded like a level 1 dude, but he authorized a new actiontec pk5000.
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Mar 20, 2013
I am trying to setup a cisco 2600 router that will be used to connect to a Qwest internet T1. I will have a Cisco ASA firewall behind the router so that I can build a site to site VPN tunnel. Qwest requires PPP encapsulation. The Lan side network is 10.2.0.0/16. Qwest gave me their serial IP address and my serial ip address which was I used to configure the route. The ethernet interface was configured for the local Lan side subnet and i natted both the inside and outside interface of the router. I am not sure if this is correct. How do I configure the router so that I can use one of the available public IP Addresses as the outside interface of the ASA?
Here is the config of the router:
version 12.2no parser cacheno service single-slot-reload-enableservice timestamps debug uptimeservice timestamps log uptimeno service password-encryption!hostname cedar!logging rate-limit console 10 except errorsenable secret 5 xxxxxxxxxxenable password xxxxxx!ip subnet-zeroip audit notify logip audit po max-events 100no ip dhcp-client network-discoverycall rsvp-syncinterface FastEthernet0/0description Lan Interfaceip address 10.2.1.1 255.255.255.0ip nat insideno ip route-cacheno ip mroute-cachespeed autofull-duplexno mop enabled!interface Serial0/0ip address 65.121.x.x 255.255.255.252ip nat outsideencapsulation pppfair-queueservice-module t1 clock source internalservice-module t1 timeslots 1-24!ip nat inside source list 1 interface Serial0/0 overloadip classlessip route 0.0.0.0 0.0.0.0 65.121.x.x (qwest serial IP address)ip http serverip http authentication local!access-list 1 permit 0.0.0.0 255.255.0.0
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Jan 26, 2012
enable dot1q encapsulation on two ethernet ports on a 1721 router. I am able to configure it on the built in fastethernet port, but not on any interface provided by a WIC-1ENET or a WIC-4ESW. I have an application that requires two physical ethernet ports that support dot1q encapsulation.
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Jun 2, 2013
I was wondering why do L2 swicthes have a unique mac address on all switchports ? These addresses are not used for mac rewrite during L2 forwarding since these switches themselves are layer to transit switches. What are these mac addreses used for then ?
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Jul 17, 2012
I have a Catalyst 4500 L3 Switch Software (cat4500e UNIVERSAL-M), Version 03.02.00.XO RELEASE SOFTWARE (fc2). So I just wanted to verify that the switch only does dot1q encapsulation because the switchport trunk encapsulation dot1q command does not work.
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Apr 14, 2012
I've buy a SRP500 Series Router (ADSL 2+).My ISP need RFC1483 Routed with LCC encapsulation type but this router dont have this type of encapsulation available in WAN settings. What can i do to use this device with my ISP adsl connection ?
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Apr 3, 2013
we have an ASR1002 running zone-based-firewall with 2 zones:
zone_ouside
zone_ph
I have a common ZFW-configuration on that interfaces, e.g.
<code>
class-map type inspect match-any pass_cmap_in
match access-group name pass-ipv4-in
!
class-map type inspect match-any ph_cmap_in
match access-group name ph-ipv4-in
[code]....
There is some basic stuff in the Access-Lists; direction ph-ipv4-in contains basically "permit ip any any" and ph-ipv4-out contains some permits for certain services, but nothing else. The pass-ipv4-in/out ACL contains particularly the udp-500/4500-stuff as well as gre/esp/ah.
Here are the zone-pairs:
<code>
zone-pair security zone_ph-zone_outside source zone_ph destination zone_outside
service-policy type inspect ph_pmap_in
!
zone-pair security zone_outside-zone_ph source zone_outside destination zone_ph
service-policy type inspect ph_pmap_out
!
</code>
[code]...
The xconnect is only built up correctly when I configure the interface in the zone_outside. The destination for the xconnect is an ASR9k. If I do not configure the zone on the L2VPN-Interface, only arp-packet are allowed to tgo through the tunnel.
The L2VPN connects a branch office to the network of "PH". Now the trouble starts: when they are putting a host in the branch office, DHCP via the L2VPn works fine, they can ping anything from the branch office-PC in their local network and reach all internal servers etc.
BUT if they want to go to a destination outside their network, it will not work properly. For example, the branch-office-PC can ping 8.8.8.8 fine, but when they try to connect to a website, e.g. www.google.com, they run into a timeout. Netstat says, that the http-syn is sent, but no ack is received.
On the router, I see:
Session 1178BAE8 (x.y.225.250:2370)=>(173.194.35.151:80) http SIS_OPENING
whereas x.y.225.250 is the PC connected via L2VPN in the branch office to their local lan. When they put the same machine in their local lan directly behind the router (without l2vpn) everything works fine. When I switch off the firewall on the Gi0/0/0-Interface, the PC from the branch office also reaches its destination, so for me it looks like the firewall inspects the traffic going via Gi0/0/1 and L2VPN, what in my opinion, it should not do....
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Mar 22, 2013
I created new VDCs. Since I have done so, there is not switchport command under the interface configuration.
The interesting this is that it is available on the admin VDC, but not the new VDC I created. I cannot create a peer VPC Peer link between my 2 Nexus switches. I did allocate ports to the new VDC and I did verify the enabled feature are the same.
why the switchport command is not available?
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Feb 16, 2012
I have Catalyst 3750 running IOS version c3750-ipservicesk9-mz.122-55.SE.bin. I have an access port that connects to a Redhat Linux version 5.4 64 bits machine. When I perform a "show mac address-table interface g1/0/3" where the redhat machine is connected to, I see two mac addresses on this access port. One of the mac addresses, 0025.9006.4898, belongs the the redhat machine. the other mac address, I have no idea where it comes from. I tried to perform clear mac address-table dynamic g1/0/3 several times but it does not work either.
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Jun 9, 2012
I am trying to configure a 4507 R chassis with Dual SUP but i cannot see teh switchpot mode trunk encapsulation dot1q?
I have typed:
interface GigabitEthernet5/1
description DOWNLINK toxxxxxx
switchport mode trunk
channel-group 11 mode on
!
I have have searched all other commands and sub-commands but could only find dot1q-tunnel which I beleive is for QINQ or some QoS featues and lot for L2 encapsulations?
the puzzling is:
XXX-Core4507#sh int gi5/1 trunk
Port Mode Encapsulation Status Native vlan
Gi5/1 off 802.1q notrnk-bndl 1
(Po11)
when I connect the dostribution switch a 3507 to this int gi 5/1, both interfaces do come up?
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Jul 24, 2012
I'm unable to apply a policing limit in a switchport of the CISCO861 router. This is my configuration:interface FastEthernet0, service-policy input wired-input,service-policy output wired-output end.
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Nov 10, 2012
I have encountered a different issue. When I configure " switchport voice vlan 2" under f0/2 connected to ip phone, it does not have any effect.
Below is my set up:
Sw is cisco cat 3524 XL.
ip phone-------f0/2( vlan1)-----SW----f0/1---trunk------f0/0-CME-router+dhcp
|
f0/3( vlan2)
tftp server ( 201.201.201.3)
switch has two vlans:
vlan1 (data) 200.200.200.0/24
vlan 2 (voice) 201.201.201.0/24
Switch management int vlan 1 : 200.200.200.3
router
f0/0.1 200.200.200.1
f0/0.2 201.201.201.1
The trunk is working correctly. (code)
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Apr 19, 2012
I try change the configuration the port in the switch catalyst express 500, i need disable switch port port-security, a try with http://10.1.1.1/exec and save configuration with wr command, if a check the configuration de port is correct but i reboot the switch and check the configuration the port appear the switch port port-security configuration again.
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