Cisco :: Cannot Trunk With Allied Telesis Switches
Oct 29, 2012
I'm working with an established Network, which has 2 Allied Telesis Switches (1)&(2).I must add another Allied Telesis (3), and a Cisco Switch.If I connect just the Cisco Switch, and the AT(3), it works ok. I mean it trunks. It also works ok if I connect the AT(3) with AT (1) and AT (2). But if I want to connect the Cisco SW with AT(1) and AT(2), or AT(1), AT(2) and AT(3) It doesn´t trunk. Even if I set the Cisco Switch port I use, as a trunk port.I think I have a problem with the vlans already created on AT1 and AT2. But the problem is that I cannot access to the AT console mode.
Does the Catalyst 3750-X (WS-C3750X-24T-L) and Allied Telesis AT-9924T url... switches work together without any issue? The two switches will be connected using the following modules: [code] The Allied Telesis switch is the core L3 switch currently being used, and the new Cisco switch to be purchased will be used for servers (single VLAN 100). It is planned to configure link aggregation between the switches. Because the Cisco switch is to connect only servers all ports except connected to Allied Telesis switch will be on a VLAN 100. I have checked the Cisco switch software configuration manual and could not find any word about GVRP protocol support. Does that mean the 3750-X will not be able to do VLAN trunking with Allied Telesis switch?
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.
How does the ESW 500 or SF300 line guarantee QoS of voice traffic when trunking switch to switch? I have (2) ESW 500 series switches in series. The phone on switch 1 have no audio issues, but the phones on switch 2 (the last in the series) have intermittent voice quality issues when dialing across a WAN circuit to another office. The phone on switch 1 do not have that issue though they traverse the same circuit. They are all using the same VLAN 100.
I'm trying to set up a trunk between an SG200 and a SRV2048.. I am attaching my configuration that not works..
I test to ping an host that is open on Vlan 22 on Swich01 from the other switch, SWITCH02 , from a port 26 that I opened on VLAN 22 in untagged mode but nothing works..
Our company currently have a 3com 2816 connected to a 3com 4800G through a trunk. The 4800G connects to the PBX and to the ip phones/computers. We are currently using vlan1 (192.168.100.n) for data and vlan 3 (192.168.101.n) for voice , Ip addresses are being issued by a DHCP server. Each user has an assigned IP phone and it has an ethernet port that connects to each computer. This setup has been working properly until I purchased an SG300 and replaced the 3com 2816.
The ip phone is showing a bad gateway and the PC are getting an ip address of 192.168.101 (which is for voice). Theoretically it should work, but what is weird is, it seems the SG300 trunking with the 3com 4800G is not working. Is it possible that it is on ISL mode rather than dot1q?I also saw its running RSTP, should I changed it to classic STP?How do I fix this or what troubleshooting should i do?
The SG300 is configured as a layer 2 switch. Configuration for the trunk below:
I've noticed that a couple of switches are complaining about duplex mismatches on trunk interfaces. When I took a closer look, two switches (switches 1 & 3) are reporting that they have a duplex mismatch to a device connected to a downstream switch (switch 2). Basic topology is switch 2 has a 1G fiber link to both switch 1 & 3.
Is it possible to use Port Security mechanism between two switch (3750 or 3560) ports while trunk has been configured? If it's not possible, is there any other way to ensure that no other Switch can be connected other then the one switch which has been configured/placed by a network engineer?
I have client who has two distant offices with 3750 L3 as core (do all vlan routing for local office) and multiple L2 access switches with multiple VLAN’s connected to it. First 3750 is hub also connected to internet, second 3750 is spoke and acting as a router on stick. We have eigrp configured on both side ISP provided client 100Mbps link as a trunk with two vlan; vlan10 for voice and vlan20 for data. We assigned two small subnets to these vlans 10.15.17.0/29 and 10.15.17.9/29. Hub addresses are 10.15.17.1 and 10.15.17.9 respectively. How to force voice over VLAN10 and data via vlan20, but still do some load balancing? How to setup default route on second (router on stick) switch?
I've been having a debate with a colleague about QOS COS values. My colleague says I need to use COS values across layer 2 trunk links between access layer switches and core switches. My argument is if phones are marking packets with DSCP values I don't need to be concerned with Cos.The reason I ask is we're implementing a new phone system, the ip phones will mark RTP traffic wih dscp value EF and Call signaling with DSCP value of CS3. If my understanding is correct I can trust the dscp values of the phones. We are using Cisco 4507 switches which I believe automatically trust dscp values so I would just need a class-map to match the dscp values and apply the output policy map on the egress interfaces as follows? [code]
I have couple of Linksys SRW 224G4 and SRW 2024 connected together with Cisco C3650 switches. For my part of network VLAN100 is used as administrative vlan and VLAN1 as defult (on trunks or unused ports).Altrough most of switches work fine, on all older models of SRW224G4 (hw 1.0, various firmware versions) there is no connectivity to management utilities (also ping won't work) via trunk (where of course VLAN100 is present). At the same time there is no problem with access from "local" ports (assigned to VLAN100) and there are no problems with traffic on VLAN 100 along the network.
For example:Two computers (A and B), two switches (sw1 - old SRW224G4 and sw2 - Cisco switch), are connected as follow: A--VLAN100--sw1--TRUNK--sw2--VLAN100--B
Swicthes have VLAN100 as management VLAN, computers are connected to access ports (untagged).A has access to management on sw1 and sw2 and connectivity with B?B has access to management on sw2 and connectivity with B but has no access to management on sw1...If sw1 and sw2 are same, old SRW224G4 - everything works fine.Newer versions of SRW224G4, SRW2024 and SLM2024 works OK.Why it doesn't work?
We have 7 3560's in 7 different locations connected to our providor for wan access. Our provider has given us a copper cable at each point and we have connected it directly to our 3560 switch at each location. Each port is configured the same way at each location. Each switch is running eigrp.All of the switch ports on each switch are configured as a trunk and vlan 299 had the ip address for the eigrp connection: [code] This setup is working as each switch see's all of the other switches as an eigrp neighbor. We have also made sure that the switch at our head office has spanning tree priority for vlan 299.
So the problem is, if there is a change in the topology at one of the locations it usually causes one or more of the other connections to go down for some reason. We just cannot pinpoint what is causing this change. There are no log's or anything other than an eigrp hold time expired message.?
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.
trunk port connecting but not allowing access to tree; i connected 4506 port to 3550 port; and i set both to switchport mode dynamic desirable; the 4506 port was set with switchport mode access and switchport mode access vlan ?; i used the command default switchport access vlan to remove the vlan; the ports are up but as I stated I cannot connect ot our workgroup tree
I have a 3750 as a core and have a series of HP Procurve switches that are daisy chained using one port. I have two vlans on the port now (6 &9) and everything works fine, all switches communicate and end devices on the switches are also talking. There is a requirement to add a device towards the end of the chain which requires it to connect using Vlan1. Once I add Vlan1 to the port onthe 3750 I lose connectivity to all the HP switches.
I faced with a strange behavior of ME3600.For testing purposes I linked Cat3550 and ME3600 switches via trunk mode. All interfaces are in Up state. But I couldn't ping SVI200 of Cat switch from ME3600 and vice versa. [cde]
This scheme perfectly works with another L3 swithes. For example Catalist3750. I know that ME doesn't support VTP, DTP and so on. Also, I've tried latest software.
I have a Cisco SG300 switch on which trunks are configured. I have a server which sits on the switch via a trunk link of four network cables (4 Gbps total)on which LACP is enabled. I'm having trouble connecting to the server using VNC from a computer on the network. It doesn't happen all the time though, it's just random.
On looking at the logs of the switch, I saw something unusual. The trunk that connects the switch to the server is constantly removing all the member ports and adding them back again after a few minutes interval. That causes the trunk link to flip on and off all the time. What could be the reason that's causing it to happen? I know it could be the network cable but I'm using brand new cables and the server also is brand new.
I am looking into the possibility of using private vlan's for some dmz implementations however I do have what may be some very rudimentary questions. It seems straightforward how to configure the primary/secondary vlan configuration as well as associating them. However in my case I would be looking to configure the PVLAN on a 6500-vss platform acting as the router while all of the hosts which I would desire to have in the isolated vlan would be spread out across a number of older Cisco switches which only support "protected port" setup or Procurve switches all of which I do not have budget to replace with something newer. So in my scenario I would have a 6500 connected by trunk to multiple switches which only support a protected port setup such as a Procurve (top of rack) or a Cisco 2950. As the Procurve or 2950 would not support Private VLAN setup, do I then just configure the secondary vlan to be allowed across the trunk from the 6500, configure that vlan on the Procurve or 2950 (as vtp will not foward the info for the secondary vlan) and assign that vlan to the host port as well as setting it as a protected port and this will communicate just fine across the trunk to the router as well as stopping the protected port in top of rack switch 1 from being able to communicate to a protected port in top of rack 2,3,etc? If the above scenario is what needs to be done, do I just use a regular trunk or do I have to use a PVLAN trunk?
We install a stack of C3750x switches rescently. A HP C7000 blade server uplink to C3750x using etherchannel and 802.1Q.If the trunk includes a RSPAN vlan on it by 802.1q default configuration, the VM on HP blade cannot ping the same vlan server on C3750x.If the trunk is configured by "allow vlan" and exclude the RSPAN vlan, then the connection is ok.
Telco provided a BGP connection on MPLS network. When I connect router directly to Telco switch I can see BGP neighbor, so my router BGP config is OK. However, I need to put this router in a diffferent building and want to bring the connection over on a "trunk"; now I loose the BGP neighbor. I'm sure I did this before and it worked OK. I'm trunking between 2 x2950 switches using this config on each switch. [code]
I also configured the trunk as vlan 1214, which is the encapsulation provided by the Telco (dot1Q 1214).
i have plan to deploy cisco WAP321 on my customer, and after rading the document about WAP321, it said the WAP321 support for VLAN ID feature, but i cant find whether it support for trunk port because i would like to connect the WAP 321 LAN port to the cisco SMB switch SG300/SG200. is the trunk port already enable on the WAP 321 LAN port so i dont need to configured it or not ?
i would like to setup a L2 VLAN trunk connection over a VPN. I hear this can be done with a GRE tunnel. I currently have Cisco MWR2941's that i would like to configure the TRUNKs on then push them over a 5520 VPN ( IPSEC Tunnel ) to a 5510. on the other side of the 5510 i will have another MWR2941 to recieve the trunk.
how to configure this trunk or some configuration ideas?
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).
We have our aggregation layer here composed of two N7K with vPC between them. Every access switch is a N5K. Security policies state that we have to filter unnecessary vlans going through the trunk between N5K and N7K. So we use the 'switchport trunk allowed vlan 10,20,30' command. My question is: Do I have to include the native vlan id on this command?
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?
I have a Cisco SW ( 3560 ) with one Trunk link to my router ( 7606 ), Trunk link is fully utilized so i need to add 2nd Trunk.Shall all move some customers from old trunk to 2nd one and create a new subterface for them ?I am think if i can create bundle and add subinterfaces under this bundle ?Add two GE ports to be memeber of this bundle ?
2 router to connect my phone system to a Sip trunk provider router and to extend my Lan segments so the phone system have internet access.i need it this way because i cant put 2 default gateway in my phone system so the cisco Rv042 is the default gateway of the phone system and i use port fowarding of the UDP ports 5060 to point to the system.and i also use protocol binding of these ports to the Wan 1
Phone system connect to a switchport The sip trunk router connect to the Wan 1 My lan is connected to the Wan 2 Everything is working fine exept this intermittent issue : Each hour or so my sip trunk stop working. to make it start working i need to unplug my Wan 2 connection and wait for 1 minute.
