Cisco Switching/Routing :: QoS 3750 Switch Port Trust Without Resetting

Oct 7, 2012

We have QoS configured throughout the company, but the standard config we have applied across the 3750 switches only includes the below: We have IP phones (not cisco) attached that are marking with EF, and the PC is an untrusted end device (so needs to be by default marked as zero).Is the above enough to trust VOIP DSCP EF without resetting it to DSCP 0, or do I also need to add a trust line (i.e.: mls qos trust dscp)?

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Cisco Switching/Routing :: 3750 - Use MLS QoS Trust DSCP With Service-policy?

Dec 24, 2012

i would like to know the possibility to use mls qos trust dscp with service-policy in the IOS ver.12.2(25)SEE2.The specific version is not possible to configure like below.
 
Cat3750(config-if)#do sh run int f1/0/1
Building configuration...
 
[code]....

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Cisco Switching/Routing :: 3750 No MAC Address On Switch Port

Apr 15, 2012

There 's a Cisco IP phone that sits between a PC and the switch port. On the switch port, no MAC address is learned. However, the switch is able to detect the IP phone and deliver power to it: [code] Switch is Catalyst 3750 with IOS version  12.2(58)SE1.

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Cisco Switching/Routing :: 3750 Switch Stack-port Changes

Feb 7, 2011

I have a stack with a lot of stack-port changes, but on all the ports, how can I determine the faulty switch in the stack, cables are already verified. We did also a restart of the whole stack power off/on
 
running version
 
WS-C3750-48P       12.2(55)SE            C3750-IPBASEK9-M
 
This is the output after 6weeks
 
Switch#/  Stack   Neighbor   Cable    Link   Link   Sync      #         In  Port#     Port              Length    OK   Active   OK    Changes   Loopback          Status                                          To LinkOK          --------  ------  --------  --------  ----  ------  ----  ---------  --------  1/1     OK         4      1

[Code].....

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Cisco Switching/Routing :: Config Port Forwarding In 3750 Switch

Nov 6, 2012

I have a 3750 catlyst switch in my network and it is like a distubation switch,And for the nating and dhcp nomadix is using as gateway in the same network. for one of my local PC i need to config the port forwarding in 3750 switch. How to config the port forwarding on 3750 switch,

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Cisco Switching/Routing :: 3750 - Setup A Switch Port For 2 Vlans

Nov 8, 2011

I'm trying to setup a port on a catalyst 3750 so it will pass traffic for 2 vlans. It connects to a (watchguard) firewall which I've configured with a primary IP (for vlan 27) and a secondary IP (for vlan 29).
 
However I can't seem to find the correct commands to enter on the cisco switch port (I've tried a variety).
 
FYI the current configuration is...
interface FastEthernet1/0/38
description ## Connection to WG vlan27 and vlan 29 ##
switchport trunk encapsulation dot1q

[Code].....

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Cisco Switching/Routing :: How Many Port Channel Can Configured In Switch 3750 X

Apr 23, 2012

I would like to know how many port channel can i configured in the switch 3750 X ? and if there is a limitation by IOS ?

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Cisco Switching/Routing :: 3750 Populate All Switch Port With 100 Filter List

Oct 27, 2011

If i fully populate all switch port (Cisco 3750 series) with 100 filter list on each port is it recommendable.

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Cisco Switching/Routing :: Not Able To Ping Link Between 12-port 3750 Switch And ASR-9010

Apr 3, 2012

I have one 12-port 3750 switch having one gig connectivity with ASR-9010 router having IOS-XR. I am not able to ping this link with 9000 mtu size. I have enable system mtu jumbo on switch to 9000 and on ASR router interface mtu is set to 9114. At switch side switch interface is configured as a trunk port and one vlan has been passed on that interface. I am not able to ping the ip 172.16.10.2 with 9000 mtu size.

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Cisco Switching/Routing :: 3750 - Avaya Phone Switch Port Configuration

May 29, 2013

Since Avaya phones do not run CDP, how does the phone know which DHCP pool to pull from to get its IP address if the PC is connected to the phone.
 
Let's say I have a interface config like this 
interface gigabitethernet1/0/1
cisco3750(config-if)#switchport mode trunk
cisco3750(config-if)#switchport access vlan 126
[code]....
 
And two DHCP scopes configured on the switch. What keeps the phone from pulling from the wrong scope?

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Cisco Switching/Routing :: 3750-48 Port Switch - IP Route Added Not Showing Up

May 30, 2013

We have a cisco 3750-48 port switch.We have a few SVI's configured and some static routes configured.I had created a new interface vlan and gave it an IP. I can ping the gateway.
 
Now I want to add a static route to go out that interface.when I add: ip route 10.x.x.x 255.255.255.0 10.52.10.1
 
it eccepts it (no errors) But, it does not show in the routing table nor in the config? How to add the static route to go out that vlan interface.

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Cisco Switching/Routing :: 3750 Method Of Forcing Non Connected Switch Port LED To Blink

Jan 9, 2012

Any method of forcing a non connected switch port LED to blink for a certain number of times regardless if there is anything connected.The purpose of this is we have remote 3750 switch stacks and quite often have to tell non technical staff to patch to a certain port. It would be much easier if we could say "Connect it to the empty port which just started blinking orange" as the port numbers are difficult for them to see in these locations.A similar feature is available in the ethtool package for linux which makes it really easy for identifying ports on servers. It would be great if a similar feature is available on Cisco switches.

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Cisco Switching/Routing :: Difference Between Using Hsrp On Vlan And Physical Port On 3750 Switch

Nov 14, 2012

What the different between using hsrp on vlan interface and on physical port (routed port) on Cisco 3750 Switch? Wha the benefits?

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Cisco Switching/Routing :: 3750 - Change Port Numbering So Master Switch Gets GigabitEthernet1/0/x

Jul 18, 2012

I have 2 x 3750 stacked, the port number of the master switch is gigabitEthernet2/0/1, slave as gigabigEtherent1/0/1.
 
Can I change the port numbering so that the master switch gets GigabitEthernet1/0/x?

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Cisco Switching/Routing :: Configure LACP In 3750 For Two Port Connected To Dell M6220 Server Switch?

Aug 1, 2012

We have Dell M6220 blade server that server is connected to cisco 3750 switch. I am trying to configure LACP in 3750 for two port which are connected to Dell M6220 server switch. The channel-group 2 mode  active commande is not taking then its showing the error protocol mismatch and if i run show int port-channel 2 command the port channel status is showing down. The Dell server switch is on simple mode. below i have attached the required details.

Switch#show int port-channel 2
Port-channel2 is down, line protocol is down (notconnect)
  Hardware is EtherChannel, address is 0000.0000.0000 (bia 0000.0000.0000)
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set

[code]...

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Cisco Switching/Routing :: Replacing 3750 24 Port With 3750 48 Port?

May 21, 2012

We have a stack of switches that is at the max number of members allowed in the stack. Problem is we are running out of port density and need to add more ports. So instead of adding a whole new stack I would rather replace 2 of the 24-port swicthes with 48-port switches.
 
If the two 24-port swicthes we are removing are stack members and neither of them are the stack master, I should be able to replace the 24-port switches with the 48-port switches without bringing the master offline? If the new 48-port switches are running the same IOS version as the current 24-port swicthes, they should add themselves to the stack?Would I have to tell the new 48-port swicthes what switch numbers they are replacing in order for them to be added to the stack since we are at the max number of members?Also since the 48-port swicthes are replacing 24-port switches will the master give the 48-port switches the configuration for only the 24-ports?

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Cisco Switching/Routing :: 3750 / 3800 - Configure Trunk Between Switch And Extreme Switch

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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Cisco Switching/Routing :: 3750-X Stacking Switch By Switch

Nov 18, 2012

I have two 3750-X configured to be a stack and I am planning to re-rack these somewhere else.  What I would like to know is what are the effects of having the master switch itself lose power?  Does it immediately just make the member take over master (there should be no election since there are only 2 switches??) and there would be no loss of connectivity?

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Cisco Switching/Routing :: 6500 - Hardware QOS Trust?

May 8, 2012

I have a question which i am unsure of, on the 6500 i know i can set mls qos trust to cos or dscp since I don't have any trunks configured on that switch that i want to trust cos most of my ports trust dscp instead. The question is will packets coming in or going out at L3 with the TOS bits set get placed in the correct in/out queue. For example if a packet comes in on a port with a mls qos trust dscp and has the TOS set to XX will this XX get mapped to the correct COS value based on the default dscp to cos map and end up going out the correct queue which handles that specific COS number?
 
I mainly asked this because i saw the following on the cisco site and again i am suing dscp trust and not cos.
 
Weighted Round Robin (WRR), Deficit Weighted Round Robin (DWRR) and Shaped Round Robin (SRR). WRED and all the Round Robin scheduling options use the priority tag (CoS) inside an Ethernet frame to provide enhanced buffer management and outbound scheduling.

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Cisco Switching/Routing :: 2960 - Trust / Untrust DSCP Value

Jul 4, 2012

I am reading through a QOS Document and they want me to trust the DSCP value from an IP phone (Siemens) but UN trust the PC DSCP value.  How can I trust one thing but not the other? I am using a 2960 Cisco switch with IP base IOS.

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Cisco Switching/Routing :: Trust Dscp Configuration On 2950

Jan 8, 2013

i have Catalyst2950SI with iOS12.1, connect a wifi-access-point  to f1/1(dot1q trunk port),and connect another L2SW to f1/2(dot1q trunk port),and IP phone, MobileCamera connects to wifi-access-point,IP phone has dscp=40 value on its own packet,but MobileCamera doesn't  have any dscp value or cos.now, i wanna do QoS by that dscp, So i type as below,
 
interface 1/1
switchport mode trunk
mls qos trust dscp
 
interface 1/2
switchport mode trunk
mls qos trust cos

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Cisco Switching/Routing :: Convert Switch Port To Router Port On 6500

May 8, 2012

On the supervisor card of a cisco 6500 series, according to the following link, [URL] it only has 2 uplink ports on the card. Would I be correct in assuming that I only have those to ports that I can configure IP addresses on?
 
The cisco that is being devlivere is coming with a 48 port switch and 24 port fibre switch. Could I change any of those ports into a router port and configure IP addresses on those?
 
The supervisor card is a ws-sup-720-3b the 48 port switch is a ws-x6748-ge-tx the 24 port fibre switch is ws-x6724-sfp

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Cisco Switching/Routing :: 3825 ISR - Traffic Route From Switch Port To Router Port

Jun 5, 2013

I'm fairly new to Cisco products am in the process of developing my network knowledge on a deeper level.  I have a 3825 with a HWIC-4ESW and I'm struggling to fully understand how the two "see" each other.  I've setup a V LAN with a layer 3 address on the HWIC and added the switch ports to it.  This seemed to allow devices connected to the switch ports to talk to the built-in router ports.  I thought this was all making sense until i applied an access-list to the router port.  It's a simple ACL i'm just using for testing and the only thing it does is blocks telnet from anywhere.  I know the ACL is setup properly because if I connect a device directly to the router port i cannot telnet to the port.  However, if i connect a device to one of the switch ports, i am able to telnet to the router port successfully. 

It seems that I'm missing something with how traffic flows from the switch port to the router ports and how the two "see" each other. 

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Cisco Switching/Routing :: Difference Between Auto Qos And Voip Trust With C2960S

Aug 1, 2012

Are there any differences between the autoqos commands on a WS-C2960S switches (or in any other series)? Follow the commands:
 
- auto qos trust
- auto qos voip trust
 
I was checking the documentation on this link:
 
URL

And couldn't find any great difference between the two commands, as far as I could see they'll set the Ingress and Egress queues the same way.
 
Are there any differences between those two commands (auto qos trust and auto qos voip trust)? If so, when should I use one and the other?

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Cisco Switching/Routing :: What Is The Use Of No Switch Port Command In L3 Switch

Dec 28, 2008

what is the use of no switch port command in L3 switch?

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Cisco Switching/Routing :: 1700 - Setup For Connecting Router AUX Port To Switch Console Port

Feb 26, 2012

I was looking for a way to connect an AUX port from a 1700 router to a 6500 switch module console port, to see the output of the Switch's on the 1700 router, in case there is a network downtime, I could see what's going on in the switch, what cable should I use ? Also, is  there is any kind of documentation for this type of config what have I seen is very few info.

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Cisco Switching/Routing :: Inter-VLan Routing On Catalyst 3750 Switch

Dec 17, 2011

I have been looking into this for a while and I can't seem to figure out why my 2nd vlan is not able to connect properly to the net.
 
My switch has 12 ports where my devices connects directly, they are all on Vlan 1 and they all work perfectly. on Port 12 I have a dlink router that is connected to a cable modem. the dlink router has an Ip address of 192.168.0.20
 
I created a second vlan (vlan2) and enabled dhcp relay on it. then I assigned port 9 on the switch to  (vlan2)my laptop which is connected to port 9 seems to get an ip address fine and able to ping only some devices on my network (vlan1) and is not able to go out to the internet.  I think it has to do with the routes. [code]

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Cisco Switching/Routing :: 3825 / Replacing Routing Function With 3750 Switch?

Jul 27, 2012

I have the task of replicating the router config on a 3825 router on a 3750 switch. Reason is we are taking out the router and replacing it with the switch to make use of the router for other functions.
 
Below is main part of the router config:
 
!
ip source-route
ip cef
!
!
multilink bundle-name authenticated
!
license udi pid CISCO3825 sn FCZxxxxxxx
!
vlan internal allocation policy ascending

[code].....
 
The 3750 switch I have runs C3750E-UNIVERSALK9-M, Version 12.2(55)SE3 on a LAN BASE license.
 
The first thing I have done is to order for a license upgrade to IP BASE which would give the support for OSPF routing.I do not see much of an issue with the Interface configs, however, I am not too sure about replicating the routing config on the switch.
 
My question is can I run the commands as shown for the OSPF routing on the switch? If not, can I get suggestions on how best to set this up on the switch?

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Cisco Switching/Routing :: About Intervlan Routing On Catalyst 3750 Switch

Apr 16, 2012

I have been looking into this for a while and I can't seem to figure out why my 2nd vlan is not able to connect properly to the net. My switch has 12 ports where my devices connects directly, they are all on Vlan 1 and they all work perfectly. on Port 12 I have a dlink router that is connected to a cable modem. the dlink router has an Ip address of 192.168.0.20,I created a second vlan (vlan2) and enabled dhcp relay on it. then I assigned port 9 on the switch to  (vlan2),my laptop which is connected to port 9 seems to get an ip address fine and able to ping only some devices on my network (vlan1) and is not able to,go out to the internet.

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Cisco Switching/Routing :: Cannot Reach Gateway Through Routing Switch (3750)

Mar 11, 2012

I'm running into what seems a basic ip routing config problem with a Catalyst 3750 (IP Base) switch. I have several VLANS configured on the switch with IP routing enabled, and the switch is connected to the inside interace of a new ASA 5520 as follows:
 
ASA5520 IP (Default gateway): 192.168.1.1Switchport Gi1/0/1 is configured as a routed port, IP address 192.168.1.3 255.255.255.0Example VLAN is VLAN 100, IP address 192.168.100.1 255.255.252.0 From the switch CLI, I can ping all VLAN addresses, as well as the ASA5520, and the client laptop I'm testing with from VLAN 100.
 
From the client laptop on VLAN 100, I can ping all switch interface and VLAN addresses (inter-VLAN routing is working), including 192.168.1.3, but I CANNOT ping the default gateway at 192.168.1.1.
 
Here is the relevant configuration information on the 3750:
 
!
no aaa new-model
switch 1 provision ws-c3750x-24
system mtu routing 1500

[Code]....

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Cisco Switching/Routing :: 2960 LAN Lite Image Does Not Support MLS QoS Trust Device

Jun 20, 2012

I have some 2960 switches with Lan Lite ios in my infrastructure.And I try to configure them to support "trust device cisco-phone" and "switchport priority extend cos 0" on ports with cisco phones.But LAN Lite image does not support "mls qos trust device cisco-phone".can I use any workaround to trust cos of cisco phone and to remark PC traffic with cos 0?

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Cisco Switching/Routing :: Configure QOS In 3750 Switch?

Nov 7, 2011

configure qos in Cisco 3750 switch.I have configured below template and applied on the vlan interface.But i am getting the hit on the access list but I am not able to get hit on the class map.

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Cisco Switching/Routing :: Switch 3750-X Vulnerability

Jul 19, 2012

I had a bad expirience with Switch 3750-X. Because of an auditing security processess, my customer ran a software called "Nessus" to do a scanning of vulnerability on the network. When this software is point to switch, the process of the switch will next to 100% and reset. The software only do a listening on the ports to see what ports are opened and the switch should not reset because this. Bellow is the log os switch on the moment of test; we note that the processess 'HTTP' rise moments before the switch reset. I disable the HTTP service on switch but the problem persist. The test was made only one machine connected to switch.

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