Cisco Switching/Routing :: 3750x Binding Between A Switch Interface And DHCP

Nov 8, 2011

I am looking for a way to bind between a switch interface (cat 3750X) and a DHCP server reply.The switch can operate as the DHCP server .a PC connected to interface Gi 1/0/1 will lways get IP address 10.0.0.1 because it is connected to interface Gi 1/0/1, a PC connected to interface Gi 1/0/5 will lways get IP address 10.0.0.5 because it is connected to interface Gi 1/0/5 and so on... (no matter the source MAC address who sends the DHCP request).

View 8 Replies


ADVERTISEMENT

Cisco Switching/Routing :: 3750x How Does A Switch Choose Its Default Source Interface

Oct 31, 2012

i have a stack of 3750x, with minimal configuration. there are two vlans, and two vlan interfaces with IP addresses. when i ping out from this switch to another host, it picks vlan1's ip address as the source automatically. i tested this by doing two pings with extended options using each vlan's interface as the source, and got different results. how the switch decided to use the first vlan's ip address as a source.

View 11 Replies View Related

Cisco Switching/Routing :: 2960 - Manual Ip Binding In DHCP

Nov 27, 2011

WE HAVE cISCO 2960 SWITCHES. this switch acts as a dhcp server for the hosts connected to it. Provided mac based binding to the hosts, with enabled dhcp snooping and IP source guard per interface.' I have a problem with single host couldnt get an ip from dhcp as he binded based on mac: manualip. Here is my config: We have a VLAN99, 70 hosts connected should get an ip based on mac
 
switch(2960<config>interface vlan99
# ip address 10.10.14.2 255.255.255.0(code)

The above host amit (10.10.14.31 swhould get this ip bindded with mac) but hez not getting manual ip i.e 10.10.14.31, but if an ip excluded from the dhcp free, he can get that ip i.e automatic ip . every other host are getting the ips as binded in the pool manual ip. Checked with

**sh mac-address table dynamic vlan 99   ()
**clear ip dhcp binding *   or  10.10.14.31
** clear ip dhcp snooping binding
*** clear ip dhcp conflict *

Tried to change pool names. All these troubleshoot couldn't make me success in providing amit an manual ip.

View 10 Replies View Related

Cisco Switching/Routing :: 1941 Router Interface Binding

May 16, 2012

Router 1941 is installed with additional 4 Gig-interfaces card; we have 4 ADSL Router with 4 MB connections. I need to connect all the ADSL connection to the router 4 port and combine them into 16 MB, is there any way to combine 4 Gig interfaces?

View 4 Replies View Related

Cisco Switching/Routing :: Nexus 7000 - Ip Dhcp Snooping Binding Table Is Empty?

Sep 14, 2010

I've configured ip dhcp snooping on several vlans I want to monitor and the binding table doesn't seem to be building.eature DHCP is on, global ip dhcp snooping is enabled, VLAN snooping is enabled on the vlan's I want to monitor and my trusted interfaces are also configured. Alas no binding entries in the table! 7K is running 4.2(6).

View 1 Replies View Related

Cisco WAN :: 3750 Switch - Clear IP DHCP Conflict / Binding

May 10, 2013

I configured an DHCP server on cisco 3750 switch . Wher in w3750 gets connected to plain l2 switch 2960 on floor  and machine gets connected to 2960 port. [code] Below is the description of problem:
 
-> The Cisco 3750 switch is the DHCP server. VLAN 108 is named as internet vlan.
 
-> Ports in Cisco 2960 switch has been configured with "switchport access vlan 108".
 
-> There were no problems at all and everything had been working smoothly.
 
-> 3 days back, users started complaining that they couldn't access the internet. Up on troubleshooting the issue, I found out that there was an issue with the DHCP server as the computer couldn't get any IP address at all. After setting static IP address, the internet started working again.
 
If I bind IP to MAc address reservation on core 3750 switch for some time of moment it works but after that machine gets unreachable .I restarted the 3750 switch and also all the 2960 switches over the weekend, however, the issue still hasn't been resolved yet. I did issue the command "clear ip dhcp conflict *", clear ip dhcp binding * but no joy at all.

View 2 Replies View Related

Cisco Switching/Routing :: DHCP Propagation In 3750x

Mar 28, 2013

I'm trying to get clients to pick up a DHCP address from my server. Physical config is as follows:

4-switch stack of 3750X-48P-S (x 2) and 3750X-24S-S (x 2). 48's are physical switch 1 & 2. Data stack is working fine. That's the Core Switch
Mix of 2960S-48TS-L and -24TS-L, 2960CG-8TC-L and 3560CG-8PC-S Access switches.

physical switch 1 in Core Switch, all ports are VLAN 4. No DHCP required - VLAN 4 is infrastructure only. All switches have:

Switch#(config)int vlan 4
Switch#(config-if)ip address 10.0.4.x 255.255.252.0 (Core switch is 10.0.4.10)
Switch#ip default-gateway 10.0.4.10

Physical switch 2 in Core Switch, all ports are VLAN 8 (client access, main corporate office site)
Physical switch 3&4 in Core Switch, all ports (SFP) are trunk

[Code] .....

So in that slightly spooky, obscure way that they have, the clients ought to be picking up a DHCP address from the relevant VLAN, depending on which VLAN the access port they're connected to is in. But they don't pick up anything. Connectivity is there - everything can ping everything, including clients if I set static IPs, and including DHCP server.

Should ip helper-addresses be set on the access switch VLAN interfaces too? Or have I missed something else obvious/critical? I need to have this out and on the ground and tested within 3 weeks - this is the first hurdle and I've fallen over. Like I said at the beginning, this config (or the equivalent) works fine on Packet Tracer for distributing IP addresses.

View 14 Replies View Related

Cisco Switching/Routing :: 3750X / DHCP Server Not Handing Out Specific IPs

Apr 17, 2013

I have a DHCP server for a subnet that has only lightweight WAP's in it.  The DHCP server is running on the gateway for this subnet which is a 3750X 2 switch stack running 12.2(53r)se2.I have the following configured:

ip dhcp excluded-address 10.1.10.161 10.1.10.162
 ip dhcp pool DHCP-VL20
network 10.1.10.160 255.255.255.224
domain-name mydomain.net
dns-server 10.11.11.30 10.11.11.40
default-router 10.1.10.161
ease 3
  
The server hands out up to 18 IP addresses and no more, with 20 devices on the subnet.  Scanning the subnet with a 3rd party network management system I see the following IP's never get handed out or used:
 
10.1.10.161 - 162 (manually excluded)
10.1.10.167 - 168
10.1.10.171 - 176
10.1.10.178
 
and of course  2 IP's I have manually excluded, 11 IP's in all that wont get handed out.  It should only be 2 that don't get handed out.  I've double and triple checked the exclusion and thats the only one.  so I run a 'sh ip dhcp pool' and see this:
 
Pool DHCP-VL20 :
Utilization mark (high/low)    : 100 / 0
Subnet size (first/next)       : 0 / 0
Total addresses                : 30

[code]....
 
[edit]I should also mention that "sh ip dhcp bind" does not show these randomly excluded IP's in use.  They also do not show up in any arp table I can find.I have looked all over the config and I cant find where these extra 9 addresses are being excluded. how to free up these 9 seemingly random exclusions?  Haven't issued a reload and I haven't deleted and rebuilt the DHCP server yet, production network.

View 2 Replies View Related

Cisco Switching/Routing :: 3750x - Command Cts Dot1x When Applied To An Up-link Interface

May 7, 2012

we're having an issue with the command "cts dot1x" when applied to an uplink interface.  It basically kils the connection with this command is applied.  Once you remove it, everything is back to normal, the platform is a cisco 3750x.

View 0 Replies View Related

Cisco Switching/Routing :: 3750X Switches Dropping Packets On Uplink Interface?

May 9, 2013

We have a remote site that is using 3750X switches as layer 2 switches back to our home site.  The uplink port is showing dropped packets but the utilization on the link is never about 10%.  We have a 100Mb circuit to this site.  Our speed tests and iperf tests are not showing any issues that we can see.  However the port is still droping packets.  It is not dropping at a high rate but they are dropping.          
  
switch#sh platform port-asic stats drop gi1/1/4
  Interface Gi1/1/4 TxQueue Drop Statistics    Queue 0      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 1      Weight 0 Frames 52876      Weight 1 Frames 2      Weight 2 Frames 0    Queue 2      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 3      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 1330874    Queue 4      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 5      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 6      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 7      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0switch#
         
Is there a way to capture these dropped packets to see what they are?  We do have VOIP phones at the site and are using Qos.

View 5 Replies View Related

Cisco Switching/Routing :: ICMP High Response Time To SVI Interface 3750X

Mar 13, 2011

I am in the process of installing a 3750x (IOS 12.2 (53r) SE2 IP Base) Cisco Catalyst switch in a new network of just 2 PC's (2 hosts, OS windows7 64Bits). I have enabled SVI interfaces with the both hosts installed in 2 different network segments.  We then start connectivity test.  The response time for the PING command between both hosts remain below 1 millisecond, whereas the response time between the hosts and their correspondent SVI interface is variable, and at all time is higher than 1 millisecond, sometimes it reaches 17 milliseconds. (Note that the switch CPU usage is only 8% at the time of testing)  We have performed this same connectivity test changing the 3750x switches  and in two different locations obtaining the same results. 

View 2 Replies View Related

Cisco Switching/Routing :: 3750X / Copy IOS From One Switch To Another?

Feb 27, 2013

It seems I have seen this before (and even done it once a few years ago).. but it has been a while. I have a stack with a Cisco 3750 stack that I have to replace a member.The replacement switch is a 3750X.
 
I think I have to upgrade the IOS of the older switch to be the same as the 3750X.
 
Current switch:      WS-C3750G-48TS     12.2(46)SE           
TO BE ADDED      WS-c3570X-48          15.0 (1)SE2
 
It seems to me there was a way to upgrade the older switch IOS from the newer switch or downgrade the newer switch with the older IOS.I dont have the Cisco account to download updated IOSs.

View 9 Replies View Related

Cisco Switching/Routing :: InterVLAN Routing On Switch 3750X?

May 22, 2013

my company pay a switch 3750 X. WS-C3750X-24T-E. It uses IP services basically but I failed to configure InterVLAN routing. why interVLAN routing doesn't work on my switch?

View 10 Replies View Related

Cisco Switching/Routing :: 3750x Switch Reload Automatically

Dec 15, 2012

while i am configuring a port on switch .The switch reloads.After reload the show version says
 
System returned to ROM by bus error at PC 0x458F6C, address 0x0
 
show version from the effected switch is
 
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(58)SE2, RELEASE SOFTWARE (fc1)
Technical Support: [URL]

[cODE].....

View 2 Replies View Related

Cisco Switching/Routing :: Stacking Switch 3750E And 3750X?

Oct 3, 2012

can I make the stacking of these two switches WS-C3750E-48PD-SF and WS-C3750X-48PF-L. Both have universal IOS.

View 11 Replies View Related

Cisco Switching/Routing :: Stack 3750G-12S-S With 3750X-48T Switch?

Apr 14, 2012

if we can stack the 3750G switch with a 3750X switch ?

View 7 Replies View Related

Cisco Switching/Routing :: Multicasting Configuration On 3750x Switch

Jan 28, 2013

when enabling multicasting on layer 3 interfaces the CPU becomes fully utilized , is there any specific configuration should be enabled to reduce this .
 
Config :
 
Inetface vlan 100
ip pim sparse-dense
ip igmp version 3

[Code]......

View 1 Replies View Related

Cisco Switching/Routing :: High CPU Usage In 3750X-24T-L Switch

Apr 9, 2013

The process "HL3U bkgrd proce" is causing high CPU usage issues in a switch 3750X-24T-L. The IOS is 15.0.2-SE2.
 
show platform ip unicast failed route and adjacencies displays a lot of entries, I've seen up to 1200.
 
After restart HL3U bkgrd proce takes around 10 - 20 % CPU, some hours later 99%.
 
A coupe of times we got logs like this:
 
%SYS-3-CPUHOG: Task is running for (2136)msecs, more than (2000)msecs (172/73),process = HL3U bkgrd process.
-Traceback= 0x1BE9C3Cz 0x27E103Cz 0x27E0F64z 0x50DCF8z 0x50DE98z 0x503BD0z 0x4F7718z 0x1FF0A18z 0x1F46DECz 0x1F4816Cz 0x1F48698z 0x1F499C8z 0x1FF15D0z 0x2000430z 0x1FF55B4z 0x1FF5FA4z

[Code].....

View 2 Replies View Related

Cisco Switching/Routing :: 3750X - Single Switch Stack?

Mar 8, 2012

I have a 3750X 24 port switch (with NM-1G network module) running IOS 15.0(1). Is there any benefit or reason to plug in the included Stack Wise cable and loop it back to itself in a single switch installation?
 
I don't see any recommendation in the documentation. The data sheet indicates a single switch is a non-blocking device so I'd think there's no bandwidth advantage like there is when connecting an actual multi-switch stack and needing to close the loop for the full 32 Gbps stack bandwidth.

View 2 Replies View Related

Cisco Switching/Routing :: 3750x Master Switch Crash?

Jun 13, 2012

About an hour ago I had the master switch on one of my 3750x (WS-C3750X-48PF-S) stacks crash. The only two items we've found that could have caused this issue are the roughly 1.3 million big buffer misses and several of the following in the syslog
 
SLT:WARN:No exporter configured for smartlog! I do not have smartlogging turned on, nor is there a netflow exporter configured
 
sh logging smartlogsmartlog is disabledsmartlog exporter:smartlog pkt length: 64 Total pkts processed: 0Total DHCP Snooping pkts processed: 0Total DAI pkts processed: 0Total IPSG pkts processed: 0Total ACL pkts processed: 0
 
I did not see any traffic spikes prior to the crash.
 
This stack has been stable since it's last IOS upgrade from 12.2(58)SE1 to 12.2(58)SE2 back in October 2011 so this has me a little worried.

View 3 Replies View Related

Cisco Switching/Routing :: 3750X Switch Doesn't Load Image?

Oct 31, 2011

I've 3750X switch that isn't loading email. then I went to rommon mode and accidently for "format flash". after that I loaded 15.0 SE2 s/w on it using tftp server but it doesn't boot up with that image. flash had only .bin file after I loaded it from tftp server.
 
since it wasn't booting up, I did format flash again and thought to load image again from tftp server but now, it doesn't load image from tftp server.

View 9 Replies View Related

Cisco Switching/Routing :: Connecting Core Switch To Firewall 3750x

Apr 13, 2013

I have a 3750X four-switch stack acting as the core of a fairly simple LAN. All I need to achieve (and this seems inordinately hard, but it is entirely likely that I'm just being dense) is to get access to the internet through my core switch, through the firewall and out through my VSAT. I've spoken at some length with the firewall providers (Cyberoam) and they tell me all I need to do when I migrate onto my new system (Cyberoam is currently in place at the entrance to our existing LAN) is change the local IP address of the Firewall, plug in the new switch to the LAN port, and away I go. Tried that, didn't work, so obviously I'm missing something.

View 22 Replies View Related

Cisco Switching/Routing :: High Utilization On 3750x Switch Stack?

Feb 25, 2013

i am seeing very high utilization on a random basis on the stack. and the logs indicate me that there is a pattern where there is a stack power cable shows inserted (which was never unplugged) followed by sudden spike in the utilization.
 
001018: *Mar  6 16:21:22.138: %PLATFORM_STACKPOWER-6-CABLE_EVENT: Switch 4 stack power cable 1 inserted
001019: *Mar  6 18:18:37.982: %SYS-1-CPURISINGTHRESHOLD: Threshold: Total CPU

[Code]......

View 16 Replies View Related

Cisco Switching/Routing :: Catalyst 3750X-48P Switch Ports Dead

Jan 31, 2012

I work at a hospital and we have 3750X-48P switches in stacks in various locations throughout the hospital.  We have noticed that when an EKG machine is plugged into one of the ports on some of these switches and the EKG machines are set manually to 100/Full, the ports are no longer usable until the switch is restarted.  The switch is configured for auto.  If the EKG machine is set to auto, it will work and not cause problems.  The link on the interface will show up/up and there will be output packets increasing.  However, there will be no inputs on the link and the port is unusable.  Unfortunately, even when the device is removed, the port becomes unusable for any device.  Is there any way to fix this problem without rebooting the switch?

View 5 Replies View Related

Cisco Switching/Routing :: 3750x Application Not Working When Switch As Gateway

Jun 2, 2011

In change network topology, we are going to assign PC's Gateway as Switch (3750X) IP Address rather than server IP Address. Currently we have configured all Sytems's Gateway is Internet Server IP Address which we are going to replace with Switch IP as Gateway.Issue is while connecting specific application like team viewer in which application tried to send keepalive message to the live server and in case of switch/router IP as gateway. Connection doesn't established. However it is working fine when Internet Server IP treated as gateway.

View 1 Replies View Related

Cisco Switching/Routing :: 3750X - VTP Not Working With Switch Not Directly Connected

Sep 9, 2012

We have a 3750X VTP Server and the rest of the switches are clients.
 
Due to cabling issues, we have a switch (Switch F) that we can't connect directly to the 3750X so we have it connected through another switch. Everything is set to VTP client with the correct domain and password but this not-directly-connected switch isn't receiving any VTP VLANs.
 
Anything I need to do on Switch D so that Switch F can receive the VTP updates?

View 3 Replies View Related

Cisco Switching/Routing :: Policy Map Redirect Port 80 Switch 3750X

May 15, 2012

I would like to know if it possible to create a policy map in order to redirect the traffic ( 80 , http, 8080) to a proxy.
 
My current equipment its a 3750X using a IP Service License ,I was reviewing some options but i want to be sure before implement in production.

View 8 Replies View Related

Cisco Switching/Routing :: 3750X Stack Power Limitation With Non-POE Switch?

Oct 28, 2012

We have 9 x 3750x switches with 5-nonPOE and 5-POE. There is a limitation with 4 POE per stack with Stack Power.
 
Can we combine all 9 to one stack since there are only 4 POE?
 
Or, is the 4-switch limitation applied regardless if they are mixed with POE and non-POE?

View 7 Replies View Related

Cisco Switching/Routing :: Vlan Access List In 3750x Switch

Feb 6, 2013

I have a LIII Switch Cisco 3750x ,with diffrent Vlans , Some users are in Vlan 102 (10.10.2.0) and Some Users are in Vlan1 (10.10.1.0) , now i want to restrict  the Vlan102 users to access Vlan1 , i am pasting my configuration below , how to create a access list . 
 
interface Vlan1
ip address 10.10.1.36 255.255.255.0
ip helper-address 10.10.1.36

[Code].....

View 2 Replies View Related

Cisco Switching/Routing :: 3750x - MAC Address Not Captured On Switch Ports

Feb 29, 2012

In my environment we have 3750x switches running ios 15.0 (1) SE2.  We have port security mac address sticky configured on all our switch ports.  I noticed that we have several interfaces (on different switches) that are up but have not captured the MAC address from the workstation.  Here is one example:
 
interface GigabitEthernet2/0/11
switchport mode access
switchport port-security

[Code].....

View 21 Replies View Related

Cisco Switching/Routing :: 3750x Switch Port Rate Limit

Oct 8, 2012

I want to limit the bandwidth going to remote site on the switch connecting to our netapp.We have a 4 port channel group setup on our 3750x switch going to our netapp storage. We have a Wan 100mb link to our remote site and we want only 60MBs of that link to be used for Netapp traffic all other local traffic needs to use the full amount of the bandwidth to the netapp.
 
Is possible to allocate bandwidth in this way and how would I go about this? We dont have access to the routers for the link and they plug directly into a port on our cisco.

View 3 Replies View Related

Cisco Switching/Routing :: 3750X / Core Switch In Redundant Mode?

Nov 18, 2012

Two Cisco 3750X can be stacked together to ensure redundancy.Is the attached topology feasible for access layer redundancy?

View 5 Replies View Related

Cisco Switching/Routing :: Enable Second Power Supply On 3750x Switch

Nov 6, 2012

I have a 3750x 48port POE switch that I installed a second power supply in. But it doesnt power on. Am I supposed to enable it in the switch somewhere? I've plugged it into a couple different outlets so I know that's not the problem.

View 4 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved