I have trunk etherchannel ports 47,48 which both have Vlans allowed on trunk 70,71. Everything works pretty fine. Now I am trying to add a new VLAN 72 to these ports.
conf t
interface FastEthernet0/47
switchport trunk allowed vlan add 72
exit
exit
So far so good. But when making the same command for port FastEthernet0/48 my switch stuck.
I have 4 cisco 2960 switches to which many users are connected. No vlans are the only default vlan 1 is there. Now I want to make ether channel on switch 1 whcih has 24 fast etherenet ports. Can I make port 1- 8 as one ether channel which are connected to users or i can only make ethere channel of ports that are connectd to other switchs. If I can, how the other switchs will comnicate with the switch ports bundalled in the ether channel in switch 1.
View 6 Replies View RelatedI need adding a vlan to the trunks bundled in port channel. I know how to add v lans to a port channel with Cisco IOS but with CAT OS.
I have 2 ports bundled to form ether channel in switch which is running CAT OS. There are already few v lans allowed in the trunk of each interface. now I need to add one more v lan.
For Example:-
v lan 135 needs to be added in addition to the existing v lans.
clear trunk1/2 1-112,115,117-134,136-4094
set trunk 1/2 on dot1q 113-114,116,135
and similarly on the 2nd interface
so if I add vlan135 to the trunk one after another will it cause any service disruption?
I was configured ether channel between two cisco 2960s series switches. It is working properly. I was replaced two cables in etherchannel. Now one link working remaining link is down(both cables are working cables only). Below are ether channel details.
View 9 Replies View RelatedI 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've previously used trunkports and vlans between my ASA and accesspoints, connected directly. Now I want to put a 2960S-24PS-L bewteen. Where should i define the vlans (in the switch or in th ASA?) and what ports to put in trunk mode? (the ones on the switch or the one between the switch and the ASA?)
View 1 Replies View RelatedI need to tear down an existing port-channel on a 3750X running c3750e-universalk9-mz.150-1.SE3.bin. This port channel is currently down down. It has three ports in it that will be added one each to three existing port-channels, I am assuming as long as the "channel-group" command is exactly the same as it is on the three existing port-channels I should be ok just adding the new port. One point to note is that the three existing port-channels all have three ports so this will be adding the fourth port to each port-channel. I know after reading that it is a best practice for load balancing to use either 2, 4, or 8 ports for a port-channel. Also what is the command to see all ports that are in a port channel?
View 1 Replies View RelatedI 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.
View 4 Replies View RelatedWe have around a dozen Catalyst 3560 and 2960 switches in a ring topology. We are considering adding storm control to our trunk ports. Up until now we have only used it on edge ports with default values and without error-disable.I am proposing that we also add storm control to trunk ports at a lower level and that we error-disable only the redundant links that make up our loops.
-storm-control broadcast level 25.00 20.00
-storm-control multicast level 2.00 1.00
-storm-control action shutdown [only on redundant links]
In a storm all links will restrict broadcast which should work accessing remote switches, but the redundant links should errdisable and block the redundant path. It is important that the action line is not applied to links that are not redundant as we could isolate parts of the network. Any reason not to use storm control on trunks?
I have been experiencing discards and no buffers errors on my 2950 switches. These switches are connected to two core switches 4948 and 3560G. I have noticed previous posts regrading these problems but have been unable to find any cases that were resolved. We are using 12.1(22)EA11 software on our 2950 switches.
Outputs:
flrnet3#SH controllers ethernet-controller gigabitEthernet 0/2
Transmit Receive 22204993 Bytes 904542488 Bytes
[Code]....
I have 2 hosts, 1 plugged in fa 0/21 in VLAN 101 and another in fa 0/22 in VLAN 101 on our L2 Cisco 2960. If I try and transfer files from either host the gig 0/1 trunk port on the 2960 leading tot he 3750 fa 0/1 port hits 100mb (using a real time bandwidth monitor tool), but why? This VLAN is on the same switch, why does it go one way up the trunk to the L3 3750 switch? The L3 3750 is the VTP server and the 2960 is a client. I would of thought the traffic stays local. The 2 hosts don't even have a gateway set.To sum up the typology the 2960 and 3750 are trunked using a single cable. The 3750 hangs of a ASA firewall using SVIs.Here is whatthe traffic looks like when copying a file between hosts (2gb file).
3750 L3 Switch (VTP Server)
interface FastEthernet1/0/4
description Trunk to Cisco 2960 Gig 0/1
switchport trunk encapsulation dot1q
switchport mode trunk
switchport nonegotiate
[code]....
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.
View 5 Replies View RelatedI have a switched network of C2980 & C3548 switches with multiple VLANs. I would like to understand the difference between Multi- VLAN ports and trunk ports. What circumstances would dictate using one over the other? If I configure the router port as Multi- VLAN, does the router still require sub-interfaces?
View 9 Replies View RelatedI have just configured up a sg500 with a lacp trunk to an upstream switch.
I am getting native vlan mismatch on the individual ports of the lacp team.
24-Jan-2013 12:54:48 %CDP-W-NATIVE_VLAN_MISMATCH: Native VLAN mismatch detected on interface gi1/1/24.
24-Jan-2013 12:57:35 %CDP-W-NATIVE_VLAN_MISMATCH: Native VLAN mismatch detected on interface gi1/1/48.
[Code].....
running ether-channel mode on. I have a 3120G Blade Switch (stacked). The blade switch connects to the blade servers (internal). Gi1 /0/1 connects to eth0 and gi2/0/1 connects to eth1 on the blade server. [code]
The issue is when is shutdown eth0 on the server, the corresponding interface on the switch (gi1/0/1) does not go down, show up and running.
I know there are some line cards on the 6500 that do not play well with each other when trying to setup an etherchannel using two different line cards on the same chassis. I always thought it was line cards of different type, i.e. 6400 with a 6700 but these two line cards are exactly the same model with the same code level.
1) Are the error messages below from this incompatibility between line cards and etherchannel creation?
2) How to fix if the answer to #1 is yes?
3) What line cards work with which for etherchannel creation?
Is it possible to configure a cross stack etherchannel between 2 SG500 (in stack) and 1 SG200/SG300?
View 13 Replies View RelatedI came across a Catalyst 6509 switch configuration and have noticed some strange thing on the ether channel configuration side, it appears that it have interface port-channel 2 and port-channel 2A, what was that mean? its the ether channel not forming and joined together?
What wrong with the below configuration that cause it to automatic created another port-channel (2A) interface in this case?
[code]...
We were going to create a 2 port, layer 3 etherchannel between a 1002 router and a 3750X layer 3 core switch. We wanted to create bunled link between them but, now we are going to be putting a Riverbed device between the router and core switch. Because of this, would it be best to abandon the idea of creating a layer 3 etherchannel and just have 2 links from the router and core switch and have traffic load balance between the 2 links?The Riverbed will have 2 connections into it from the Core switch and 2 connections into it from the 1002 router. I was hoping to keep the layer 3 etherchannel but, do you think it would be best to create 2, /29 nets and have the router/Riverbed and Core Switch/Riverbed load balance.
View 5 Replies View RelatedI have already raised this discussion on "LAN, Switching and Routing" group. But I guess this is the right group for my queries. So I am sending my queries in this group again.
We are using CSS 11503 with one 16FE line card. We have connected 3 servers with redundant link. So FE1-2 in Server1, FE 3-4 in Server2 and FE5-6 in Server3. Our system team has configured APA in their servers as they are using HP-Ux.
1) Do we need to do any configuration at line card.
2) Do we need to do ether-channel at loadbalancer end. if yes, can you share me any cisco doc on how to do it.
i want to realize a 20gb ring stp with 6 3750x stacked by 2. I want to install 2 3750x stacked configured in hsrp mode with other 2 3750 stacked. These 2 different stack are interconnected by a cross-stack ether channel 20Gb fiber. On the other side of the room i want to create a new stack with 2 3750x with cross-stack ether channel 20gb connected with the previous 2 stacks. So, in total 3 different cross-stack ether channel 20Gb stacks interconnected creating a ring stp of 20 Gb.
View 4 Replies View RelatedI have an 891W that I initially configured using CCP Express (2.5). So it has a WAN IP set, and through CCP Express I had enabled via the checkboxes the various default settings for security. This includes zone-based firewall. I then added a number of NAT entries in the setup wizard.
What never occured to me at the time was that I should have added entries that allow for remote access. So it seems I've locked myself out of accessing the router via the WAN interface even though I know it's IP. I'm sure it's just a matter of adding port exceptions for SSH and/or whatever port(s) CCP uses.
So I"m wondering what the proces woudl be. In the IOS while showing the running config., I see pages and pages of class-map stuff which at present I don't know enough about to risk editing anything directly. But maybe I don't have to? What would be the best way to, for example, enable SSH access through the firewall? I already have transport input ssh set on the interface itself so I believe it's ready to allow the connection, just that I can't get to it via WAN int. so I assume it's the firewall.
New to Cisco and want to know if I can segment a port. I have two v lans. I have one internet connection at the opposite end of the building. Can the port the internet is connected to serve both V lans?
View 6 Replies View RelatedI try to connect a cisco blade switch 3020 to Nexus 2232 with etherchannel, but when I connect the second link a obtain flapping on vlans. [code] why the vlans are flapping ? it's something wrong on the config ? [code]
View 7 Replies View RelatedI have two questions for a Cisco 2960 (WS-C2960-24TC-L)
1. I am working to setup a few Cisco 2960 switches for HP iLO access to our servers. We are going to segregate the iLO network (VLAN 40) from the data network (VLAN 10) by using a different VLAN. All of the HP servers will be configured with static addresses. My question is, how do I set all the ports to VLAN 40 so that untagged devices will automatically go onto VLAN 40? I don't want to have to configure the VLAN on each iLO port on the server. I tried to set the port to: "switchport trunk native vlan 40", but that didn't work.
2. Also, how do you access the web GUI for these switches? I get a login box, but putting in the enable password doesn't work. I have the following commands in the config: [code]
A site that i am responsible for has the following equipment installed:
2 x 3750G Switches configured as a stack using Stackwise - Collapsed Core/Distribution Layer
5 x 2960G Switches as Access Layer switches
WAN connections into the Core/Distribution Layer are all Gigabit Ethernet over Fibre.This is a dedicated CCTV Network with 50 Cameras all streaming video into the Core (decoders connected to access switches)Each 2960G has 2 links to the Core/Distribution 3750G Switches, 1 to each switch - Gigabit.I'm running rapid-pvst on all switches, so spanning tree is blocking one of the ports and effectively halving the 2 gig bandwidth. Next year our customer is going to add in a further 50 - 60 cameras.After monitoring the current loading on the ports in use, we have suggested to the customer that the 2 connections to each should be Ether-channeled together. [code]
First interface takes commands no problem, keep getting the message that etherchannel cannot be configured across different switches in a stack when i try to put the second interface commands on.
I have 2 Cisco 6509 switches linked together via single Fibre as a trunk.I want to change this to a port channel where I will add another 3 fibre ports to the port channel but what order do I do this to minimise any disruption.
1-Configure PortChannel and add the 3 new ports, this will bring up the Port Channel but what effect will this have on traffic currently going over the single Trunk link? Will spanning tree go mad, how will switches react?
2-Convert existing Trunk link to Portchannel then add in new ports to PortChannel, I guess in doing this there will be a small hit on traffic as it changes to a port channel.
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.
View 1 Replies View RelatedI am a bit confused by the output of 'show run' and 'show run switch-profile' that pertains to a port-channel interface configured in a switch-profile. My main gaol is to find out how can I add/remove the allowed vlans the port-channel (configured as trunk) carries. The setup is like this. I have 2 N5k in vPC domain and Etherner1/11 on both switches is configured as trunk vPC that connects to a core switch. When I issue ‘show run’ for the port-channel and physical interface I get the following output. [code] From above it seems the switch-profile configuration is missing the 'switchport trunk allowed vlan' in the port-channel interface. If want I to remove vlan 30 from the allowed vlan, should I go under the switch-profile mode and remove vlan 30 from the allowed list even though the switch-profile configuration seems to be missing this.
View 2 Replies View RelatedI 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.
View 4 Replies View Relatedi 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'm trying to obtain the vlans on a trunk and also whether the port is a trunk. Ive seen VTP mib, but these dont appear present on my switch (2950).
View 4 Replies View Relatedwe have currently a configuration with 3 bonded (link aggregation) channels, each delivering 1 Gb/s uplink, providing a total of 3 Gb/s uplink. Due to a recent network upgrade, we can now add more channels to the same group in order to have a total of 9 Gb/s uplink, meaning that we should bond toegether 9 channels. When we tried to change the old configuration in order to include six new channels to the bondend group we noticed 2 things: one channel was left in standby (blinking orange led),no increase in the uplink bandwidth semmed to happen,By looking around it looks like the channel group is limited to a maximum of 8 channels [*].
View 2 Replies View Related
