Cisco Switching/Routing :: 2960 / SG 300 Switch - VoIP Setup - Asymmetric Routing Not Working
May 21, 2013
I have a Cisco SG 300-20 as the core switch, layer 3. It is 192.168.4.6 on VLAN1 and 192.168.5.1 for VLAN2 (VOIP). All the ports are set in trunk mode. DHCP relay is setup on this switch.
The phones connected into a layer 2, Catalyst 2960-S switch. All ports are set in trunk mode. Default gateway on it is set to 192.168.5.1.
DHCP for both VLANs is provided by a Windows Server 2008 R2 server (the relay IP 192.168.4.15).
There is also an ASA 5510 in the mix which is 192.168.4.1. It has a route added to it for the 192.168.5.0 network to go to the SG 300 (192.168.5.1).
Just the two switches can ping each other on the 192.168.5.x network when I "add vlan 2" to the trunk port that is connected between the SG 300 and the 2960. The phones don't get DHCP on the 2960 switch. And I cannot ping 192.168.5.x from the ASA or anything else on the 192.168.4.x network.
After a bit of reading on intra-vlan routing for the SG 300 switch, I am thinking the SG 300 has to be the "center" of things so I need to make it 192.168.4.1 to be the gateway for both VLANs and change the ASA to 192.168.4.2 for VLAN1, etc. And I really can't do asymmetric routing with this switch.
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Dec 28, 2011
I have a new VOIP implementation using 2960 switches. I want to prioritize voice traffic. After creating VLAN 2 I did the following:
Per Cisco, I did the following on my up-link ports:
switch port trunk allowed vlan 1,2
switch port mode trunk
switch port nonegotiate
priority-queue out
mls qos trust cos
switchport trunk allowed vlan 1,2
switchport mode trunk
switchport nonegotiate
priority-queue out
mls qos trust cos
spanning-tree port fast trunk
spanning-tree bpduguard enable
On my ports where a VOIP phone was plugged in, I did the following:
switch port trunk allowed v lan 1,2switchport mode trunk switch port no negotiate priority-queue outmls qos trust cos spanning-tree port fast trunk spanning-tree bpduguard enable
How can I verify that my voice traffic is being prioritized?
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May 23, 2011
When we do self diagnostic test for WAE connected to the 6500 switch i get warning as below. Due to this alert there is no major acceleration benfits by the WAAS
Test WARN [tfo] WARN ASYMMETRIC Asymmetric routing is seen in the device Action: Check router's network configuration and WCCP redirection on the router.usevwa1#
6509 switches has only L2 capability and does not do WCCP redirection. The WCCP re-direction is done by 2821 routers.Is there any command which needs to be given in 6500 switch to solve the issue
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Nov 16, 2011
Does the Model "WS-C2960-24PC-L" Supports IP Routing or not?
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May 14, 2013
im having this strange issue where everytime i plug in a voip phone to my 3550 the switch disconnects another voip phone.then to fix the disconnected phone (7940) i need to power off the phone 5-10 minutes then power it on again.
but the strange thing is, once i have to do that to fix the phone and connect the phone back to the switch, the port link is up, but no macs are seen on that port.
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Jun 4, 2012
I have an switch 2960 and i have made an SSH connection . But the problem is that whenever i try to open with my teraterm or putty it ask for username and after that password but does take the password. It shows an error of password what should be the problem.
Commands that i entered to make SSH
config# username admin password pankaj
config# ip domain-name home.local
config# crypto key generate rsa
config# 1024
config# ip ssh version 2
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Jun 4, 2012
I have an switch 2960 and i have made an SSH connection . But the problem is that whenever i try to open with my teraterm or putty it ask for username and after that password but does take the password. It shows an error of password what should be the problem.
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Apr 9, 2013
I have the requirement to assign an asymmetric bandwith limit to each port on a switch (example: 4Mbps downlink, 1Mbps uplink). I've been searching and found the option to apply policers or srr-queue mechanism to achive this, however this only applies for one direction only as far as I know. Catalyst 2960 familiy is preferred, however if this is not possible, will possibly jump to the 3560X family.
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Jan 18, 2012
We have 3 Nortel RG 9150 remote PBXs installed at a branch location, and they have been functioning well for years plugged into 3Com 4500 10/100 switches. These switches have a very basic configuration; nothing special. We are transitioning over to Cisco 2960 switches with very basic configurations. The problem is that when we plug the 9150 into the 2960 switch, the RX light flashes like it should, but the TX light only flickers intermittently. We cannot ping it from the switch or local router. Everything in this building is in VLAN 1. I've tried turning on full duplex on the 9150 and/or hard-setting the speed/duplex on the 2960 switch. The company that maintains our 9150 sent a guy out who was completely puzzled by this too. In some ways this seems too basic to be a problem, but it is. The twist on this problem is that the 3Com switch, which the 9150s are plugged into, is connected directly into the Cisco 2960 that I can't make them work on. Plug them into the 3Com, they work; move them upstream to the Cisco, and they stop, even after I reboot them.
Here are the port configs of the 3Com and Cisco switches.
Cisco
interface FastEthernet0/15
switchport mode access
[Code].....
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Sep 23, 2012
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.
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Jun 13, 2012
I'm having trouble setting up SSH on my new Switch.
no aaa new-model
aaa authentication login default local
ip domain-name king.local
[Code].....
I would like to be able to use Vlan 10 192.168.155.1 for SSH remote management.
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Feb 5, 2013
I have a statck of 4 2960s switches, with POE powered access points on 2 of them. All of the access points appear to be functioning normally. For some reason, on 3 interfaces connected to access points, I get the following when issuing show interfaces status:
Gi3/0/9 connected: T 7 a-full a-1000 10/100/1000BaseTX
^
My question is regarding the "T" in the status field. I can't find any documentation on this.
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Dec 12, 2006
I have CISCO 2960 switch at my LAN. How to configure its IP address from console or hyper terminal ?
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Jan 14, 2013
I am trying to configure a new 2960 POE switch, but seem to me the int fa0 is layer 3 interface. Is any way we can convert it to a switchport, so we can connect it to other switch in trunk mode?
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Aug 20, 2012
i try to implement layer 2 qos in 2960. when i complete to configure the switch, i want to test the qos.PC1 conect to switch port 1,PC2 conect to switch port 2 . PC1 is source teminal. i use skydata.exe and FTP for the test.
when use the skydata ,the PC2 speed can reach 10mbps.when use the FTP , the PC2 only can reach 1.2mbps. why?
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Apr 29, 2012
I can use Putty to SSH into my new switch (Directly connected to my laptop with ethernet cable), but I cant log into my switch.
Sent username "admin"
admin@192.168.251.1's password:
Access denied
It doesnt like my password, but I have only set 1 password (king) on this switch. I've configured 3 other switches with SSH and had no problem. Been trouble shooting for awhile and It'd be great if I could have a 2nd set of eyes take a peek, Also, my running config is attached.
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Jan 24, 2012
I am setting up a new 2960-S switch and none of the recommended username and passwords combinations work. I have tried CIsco Cisco, <blank> cisco and various other permutations.
I have tried to reset the switch to factory defaults and it still doesn't work. The switch is currently connected to a 3560G and has been assigned an IP. If I try to access it from Network assistant it shows as unmanaged and I get prompted for a username and password.The switch is connected to another new 2960-S via a FlowStack module.
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Nov 13, 2011
I am trying to setup a network using Cisco 2960 switches with vlans configured. One vlan will handle video coming from four cameras that are connected to another 2960.
We have four cameras feeeding one port each on a 2960, that 2960 in turn feeds one port on the main 2960 which is the video vlan for that site. From the site it goes back to a Cisco 3750 to be sent over to a Sonicwall firewall. If we connect to the 2960 that the camera are connected to we can see the video, but not on the main site 2960.
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Jan 9, 2012
At a college I'm trying to setup a Cisco 2960 to be used on a VLAN 248 tagged on the uplink port that uses Spanning Tree/. Here is the following from the Cisco:
show interfaces trunk
Port Mode Encapsulation Status Native v lan
Gi0/1 on 802.1q trunking 1
Port V lans allowed on trunk
Gi0/1 248
[code]...
On the Alcatel OS6850-48L the following is setup: bridge 1x1 248 priority 3287 Vlan 248 802.1q 5/8 "cisco"
I cannot make a change on the Alcatel, I can only administer the Cisco. I was able to get things working fine (as a test) using a Net gear or HP switch instead of the Cisco. However we have a Cisco switches and would not like to have to buy HPs. Is there a compatible spanning tree protocol to use on the Cisco with the way things are configured on the Alcatel. I need to stick to standard RSTP (802.1w) ieee standards and not something Cisco proprietary.
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Nov 10, 2011
I have some trouble with that policy-map on my 2960 or 3560 switches with LAN base 12.2(53)SE2. I want to use that feature to catch video traffic from webcams in laptops which can't send dscp values out of the box. This is my test config to check if the function is working: catch every traffic from my workstation for testing, access-list 101 permit ip any any, class-map match-all CL_TEST
1. I can't see any counters with the command "sh policy-map interface FastEthernet 0/1". Cisco tells that this command is not possible. But how I can see if the policy is working correct?
2. When I did the configuration I can't see any packets with dscp af41 on the out going interface on the switch with "sh mls qos int gi0/1 statistic" as I expected. After reloading the switch I see the pakets with af41. Okay for that moment. But.After that I changed something in the policy-map. Only "set ip dscp ef" for a second test.
Generating some traffic I see only packets with af41 as before I changed the policy-map. No traffic with ef on the outgoing interface.
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Apr 15, 2012
I'm using Packet Tracer for testing since I don't have the actual equipment. I have configured etherchannel between two 2960 Switches. I have used the trunk ports FE 0/23 and FE 0/24 on both switches to create the etherchanel. I have connected one PC with each switch. The PCs are in the same VLAN and can ping each other. Howver, when I take down one of the links in the etherchannel, the other link does not take over and I get 100% packet loss. I don't know what seems to be the problem. I'm quoting the configurations below:
Switch0:
Switch#sh running-config
Building configuration...
Current configuration : 1179 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
[code]....
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Nov 28, 2012
I need to know the 172cisco 1 router support to IPv6 & it support to IPv6 then which IOS is required for it.Also I need to know the cisco 2960 switch is support to IPv6?
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Feb 19, 2013
Currently Being Moderated password recovery
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Feb 16, 2012
I am a new network engineer on a retail company and I am having a problem on the High utilization of my 3-stack switch 2960 only during Peak Hours of the Store Sales.
Note: on Peak hours, it is peaking at 90-95 %
here is the utilization after Peak hours:
4444333334444433333333333333333333333333333333333333333333
[Code]......
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Feb 9, 2012
I can understand it 's one of those very basic questions , but how do I identify a Switch is Layer 2 or Layer 3 ?Looking through # show version command and checking the IOS version to be IP BASE or LAN BASE . Is it the right way ?Cisco 2960 is a Layer 2 or a Layer 3 Switch ? I noticed that access-lists could be configured which means that it 's a Layer 3 Switch , right?
[code]....
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Oct 22, 2012
I have a Cisco 1841 router connected to a Cisco 2960 switch.Users behind the router can't access the internet but when someone is directly connected to the switch with his PC and uses the IP Address found on the WAN port of the router, he's able to go on to the internet. [code]
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Mar 8, 2012
Today in my rush to get home I plugged in a new 2960 stack and did a little bit of very basic configuration, but no passwords were set. I tried to telnet in and the message says that a password is required, but none is set. I tried the SDM as I hadn't turned it off yet and it is prompting me for a user/pass but I have no idea what to put in there. No console is available, it's a new office so no employees around either.
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Oct 24, 2012
i am facing time daely issues on cisco 2960 s series switch while booting .It is taking time for electing masrer and sleeve for stacking.can i disable the election process for stcking while booting.
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Mar 30, 2013
Configuration details: I have 2 nexus 5K switches and both 5K is connected to four 2960 access switches in each floor through fiber(shown in the attached picture). I have configured each VPC for each floor and portchannel configuration on 2960s switch to communicate to 5K switches. Now I am not able to communicate PC 1 connected in 1st floor to PC2 connected in 4th Floor.
I have attached topology map of my infra and the configuration files also. 1st floor switch and 4th floor swich have same configuration except IP address and switch name.
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Mar 2, 2012
If I knew the IP address of a host, can we know on which port on the switch its connected. The switch model is 2960
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Jan 30, 2012
Document at url... is quite interesting,One of these goes about the behavior of a switch (2960-S and 3750G) when QoS is not enabled vs the one when QoS is simply enabled with "mls qos".What additional commands, beside "mls qos", would be needed so as to simulate as accurately as possible the switch's behavior when QoS is not enabled?
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Nov 13, 2011
I have a client whom has asked me to enable web management on some of his 2960 switches. I did not think this was going to be an issue, and so I told the customer I would set this up for him.
Much to my dismay, I have been able to get http and https enabled, and then authenticating locally for the HTTP access. I then come to the screen once authenticated which is shown below:
The issue is that when I select "Web Console", it gives me a "Web Page Cannot be found".
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Sep 4, 2012
I have a Cisco 2960-S Switch, It is connected to a jack in the building to check the settings, Interface VLAN 1 has an ip, there is a default gateway, Any host connected to switch can access the network resources. But the problem is that I have to use Serial Cable to configure it. I cant ping or telnet into it from any other device. PC's are on different subnets/VLANS.
Basically this switch is connected to a port in a different switch, Do i have to make a trunk?
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