Cisco Switching/Routing :: 3750 Show Interface Options
Jan 16, 2012
I'm troubleshooting a 3750 switch stack problem where computers are showing input and CRC errors. I'd like to be able to execute a "show interface" command that will show me only the line showing the switch port and the line showing the input errors, but so far I can't figure out a way of combining those two parameters.
If I do "show interface | include Ethernet[0-9]�" I get all the lines showing the port numbers:
GigabitEthernet1/0/1 is up, line protocol is up (connected)
GigabitEthernet1/0/2 is up, line protocol is up (connected)
GigabitEthernet1/0/3 is up, line protocol is up (connected)
I have configured a vlan interface on a 3750 switch. there is aprox 4Mb active traffic flowing through the interface, but when I do a "show interface vlan (vlanid)" the output show zero bits in and zero bits out. Its a typical L3 config with one IP on the vllan interface acting as the gateway for the VLAN devices. Is this a normal behaviur ? and if so is there any way to get the traffic in/out stats. The end PC/devices are connected to this switch via an L2 TRUNK and I dont have access to the L2 switch on which the actual devices connect. so cant get the real time stats of those interfaces.
i've got a Cisco 877 router connected to an ADSL link. i'm using the show dsl interface atm just to have a look on its performance. i've tried to search on Cisco website on how to interpret the output but a blog gave me more info [URL]. My question now is, what readings do i consider? is it on the left (ATU-R) or on the right (ATU-C)?
I am working with 3750 switch.I console the switch and turn it on and it doesn’t show text in hyper terminal with any BAUD (I tried all the speeds). The hyper terminal works with other switches so the problem is not with the hyper terminal.when I tried to break the password it stuck after I was writing "flash_init" and when I entered or typed text it show only garbage characters. I tried to break the password with all the speeds and it shows garbage output. I tried to turn on the switch and hold control + break and it showed the text only with the speed 115200, but after I left holding and tried to type it showed only garbage again. Also I tried to copy text from the notepad to the hyper terminal.
I'm dealing with a 4506 switch that whn I try to apply "sh auth sess int xx" I get "Invalid Input Detected" ... Is there any way that I can get the authenticated session over a port even if I can't apply "sh auth sess int"?
I notice that show inventory not showing all members in a 3750-stack after we merged two stacks. Its only showing the master of the new stack, and the previous master of the old stack.
I have a really weired thing happening on 6509 device with one of my customers.The device has a SUP 2 (MSFC2) with version 12.2.18SXF17B.
any VLAN interface once administratively down or simply down shows on "show interface status" output as VLAN.While it supposed to show "Routed". However once the port is up it is shows "routed" like it should.
Is there a way to change interface numbers on a 3750 stack but, still retain the config of the physical port?
For instance:
I would like to take the top switch, which has the ports numbered g2/0/1 - 52 and change them to be g1/0/1 - 52. And the bottom switch, which has ports numbered g1/0/1 - 52 and change them to be g2/0/1 - 52. Basically, just swap the interface numbers but, not effect any interface configurations.
Cannot set route map on interface vlan. which in non default vrf on Cisco 3750.IOS c3750-ipservicesk9-mz.122-55.SE.bin sdm prefer route in enable ip vrf users rd 200:0 route-target export 200:0 route-target import 200:0 interface Vlan201 description Users 1 ip vrf forwarding users ip address 10.31.76.1 255.255.252.0 ip helper-address 10.31.4.57 route-map fromuser permit 10 match ip address fromuser set ip next-hop 10.31.128.155 When I enter "ip policy route-map fromuser" to interface Vlan 201 I heve the message:
% Remove VRF configuration from interface Vlan201 first
I am seeing Interface output drops that appera to be incorrect. When I do "Show Interface gi1/0/20", I will get interface output drops of "4294961382". But, when I do the same command again it shows "0" drops. Is this a reporting error? I am ruinning c3750-ipservicesk9-mz.122-58.SE.bin on a 3750 stack with 2 switches in the stack. [code]
One of my Catalyst 3750 switch have many out drops, I execute "sh mls qos int g2/0/3 statist" command, there are many output drops in queue3 threshold3. [code]
On a router I can use IP Accounting or Netflow to see what kind of traffic is moving over an interface. Are there any tools on a 3750 switch with a routed interface which would tell you who is hogging the bandwidth on that interface?
how to configure this. I did it in the past but kind of forgot how I did it.I have a stacked 3750 (two physical switches) connecting to a 2960.
I am creating trunk ports with limited access to VLAN 300, 600, and 700.
There is two interfaces connected from the 3750's(one on each physical stack member) to the 2960.I have the physical interfaces configured exactly the same.
Should I keep the configuration on the physical ports and not configure the Port-Channel Interfaces? Do I need to configure port-channel load balancing? Is the channel-group mode sufficient? Goal is to basically create 2 links to the 2960 to double the bandwidth and provide redundancy.
Facing issue with 2960G switch , where its do not display "logging trap informational " in show running and show startup .where its showing all other levels from 0 to 5 and 7 after configuration and save commands. [code] after config getting saved , it do not shows in show runn or in show startup while for all other levels it do show the config lines .I tried the same on 12.55.SE release also but its same results . Is this a limitaion of this platform, is there any doc explaining the same for reference. [code]
Haveing issue with DHCP server handing out IP addresses to client connected to VLAN5 interface.ISP Router>Firewall -(WatchGuard Drop-in mode) I have several 3750 switches and one acting as a L3 switch. The L3 is configured as follow: [code]
If I connect a laptop to int fa1/0/10 I DO NOT get an IP address from the 10.100.0.8 scope. If I connect to another interface within the VLAN 1, I get an address from the 10.100.0.0 range.
I have 2 Catalyst 2960S (24 ports and 48 ports). Can I stack them using the Uplink connection instead of the stack modules. I know Stack module is the best option but it is kind of expensives (half price of the 24 ports switch) and I only need to stack no more then 2 switches.
I am going to get some wyse thin clients up and running on our departments. Each department communicate with the main-office through Cisco C1812 routers.
In order to get functionally DHCP up and running, I need to
A - Configure some Dhcp options on the C1812 routers B - Perform a DHCP relay from each department to the main-office
Option B will cause some additional issues, so is not preferred.
The question is: Does the Cisco DHCP-client have an option for configuring DHCP options? I need to put in among others, an option 161, a string value pointing to a ftp-server. Can this be done? And if it can, what is the right syntax
I have recently started working here, therefore I am not certain of the IOS-version on the router, as I still not have the logon-information, but I will aqquire this shortly.
On occasion employees are downloading large files for business purposes, at very fast speeds. This has the potential to overwhelming our Internet circuits which causes our Customers problems accessing our Web Hosting services.
Our network is comprised mostly of 2960S switches for the employees. Webservers are connected to other 2960(nonS) switches and directly into the 6509 VSS.
Customer’s traffic comes in through one pair of ASA’s. Employee’s traffic is handled by another pair of ASA’s.
Employee traffic flows from the 2960’s, past an L3 SVI on the 6509, then through the Employee ASA’s, then to the ASR’s, then out to the ISP#1 or ISP#2
Web Server traffic flows from the 2960’s or 6509, to the Customer ASA, then to the ASR’s then out to ISP#1 or ISP#2. Web server traffic does not flow through an L3 SVI.
The goal is to allow employees the ability to have the most bandwidth they can, however customer traffic always has to be preferred in the event of a ISP circuit approaching its limit.
I've studied and labeled out MPLS and MPLS VPNs several times. The situation I'm presented with is a little different from most of the case studies I've seen in my MPLS books. I've attached a diagram.
We have a IPsec site to site tunnel from our main HQ router to a Cisco ASA 5510 in the core network in the colo. This allows our HQ office to reach the private sub nets in our core without using a Cisco VPN client. The problem we are running into is that this seems to be putting undue strain on the Cisco 2811. I feel like the 2811 should be able to handle it but doing any kind of upload or download through the tunnel spikes the CPU/Interrupts and makes the router CLI basically stop responding until the traffic transfer is stopped or completed. During this time, certain Cisco SCCP phones on our Broad works platform cycle while the SIP phones on the same platform are OK. We are trying to alleviate the load on the 2811 by setting up a VRF from the HQ network to the private VRF used in the Core for private sub net communication. The problem I'm having is the the HQ also has some public traffic that I do not want to include in the VRFs and would like to have it travel through the P2P circuit we have and access the internet or other public devices through the core public IP Internet routing table.
The flow would be this: -going to a public address use the public internet routing table -going to private address in the 10.x.x.x or 172.x.x.x - use VRF to core Private network.
This is a little different of a set up from most of the VRF VPN examples I've seen. Most of those the CE devices is completely private. This is not the case at our HQ.
When quoting a Catalyst 3750X with PoE (WS-C3750X-48P-E) the Dynamic Configurator Tool allows to include as the secondary power supply option the Catalyst 3K-X 350W AC Secondary Power Supply (C3KX-PWR-350WAC/2), but the default included primary power supply is the Catalyst 3K-X 715W AC Power Supply (C3KX-PWR-715WAC). My questions are the following:
1. Will this combination of power supply work?
2. Will the C3KX-PWR-350WAC/2 be able to power up the switch if the primary power supply of 715W fails?
3. Will the PoE will be lost if the primary power supply fails and only the secondary power supply of 350W keeps working?
4. If this secondary power supply of 350W is not suitable for PoE, why it is available as a secondary power supply option in the Dynamic Configurator Tool for a PoE switch?
Got 2 of these switch stacked and there is some changes that we are going to undertake which will require us to utilize the whole 8 or 4 (2 from each switch) SFP ports. Just need some adivce on which particular fiber modules should I procure. Does this switch support 10GB of SFP ?
What are the options avilable to add a cat3560 g switch to a stack of 3750x switches.?is there a connector avilable ?or is it possible to trunk via fiber ? cat 3560 has 4 sfps and 224 10/100/1000 ports with poe. cat 3750 stack has a 10 gb up link . What are the possible options?
I have configured DHCP snooping on a WS-3560G-48PS running IOS 12.2(58)SE2 ipservicesk9 variant.When I enable DHCP snooping clients don't get IP addresses, when DHCP snooping is disabled, everything works fine.I have set up a SPAN port and run a capture (attached) on the traffic. Wireshark notes the Seconds elapsed field appeared to be encoded in little-endian but only on some packets. Apart from that, I can see nothing wrong with the DHCP Offer responses from my DHCP server.Attachment config.txt contains the interesting parts of the configuration. Please note g0/32 has been set to ARP inspection trust as without working DHCP snooping it would require a static bind.Is there any way of figuring out which option can't be parsed? Is there a way to force forwarding of unparsable DHCP packets while still running DHCP snooping?
I have a couple of WS-C3750X-48T-L and a couple of WS-C3750X-12S-S, I want to stack all four of them together into a single stack. WS- C3750X-12S-S are running c3750e-universalk9-mz.122-58.SE2 whereas WS-C3750X-48T-L are running c3750e-universalk9-mz.122-55.SE3.I have got a couple of queries as under:What are the options to achieve putting all these 4 switches into a single stack? Can the LAN Base switches upgraded to IP Base?
I have an WAG120N that works just fine except the IPTV.I don't see any options where I can enable the IGMP on the WAN interface (DSL).In the routing table I see a route 239.0.0.0 255.0.0.0 gw 0.0.0.0 that is only for LAN interface.how to enable the IGMP on the WAN interface.
I have a Cisco ASA 5505 and I have my internal and external interfaces configured but I currently cannot ping from the inside to an IP Address on the outside. I had this setup and working and I have another set of equirement that I am replacing that is working with my service provider so I know it is a configuration issue. When I ping 4.2.2.2 for example I get:
Destination host unreachable
Do I need to add a static route from my inside interface to my outside interfaces?
Is there a way I can check the version of each device on two Cisco 6509 if they are Virtually connected (VSS)? When I enter the command show version, it only shows one result, unlike show module, you have an option to choose which switch by entering 1 or 2.
I did a sh inv on my newly built 2x Cat 3750X + Cat 3750-24FS stack running 12.2(58)SE2). It only showed 3 of the 4 Cat 3750X PSUs - Sw1 PSU 0, Sw2 PSU 0 and Sw2 PSU 1.
For an assignment in a class I am taking I created a simple network using GNS3 and set up static routing. Everything works fine, I can ping all of the hosts. One of the questions I am supposed to fill out is what happens when I use the "show ip route" and "show ip protocols" commands. When I use "show ip route" I get what seems to be the correct output. However when I use the "show ip protocols" command nothing happens. No output, no error, no nothing. It just goes right back to the prompt. This happens exactly the same on both routers in my network. incase it matters the router is c3640.
PS. would the output be non-existent because I have not set up any ip protocols. In a similar assignment I set up rip and when I used "show ip protocols" i did get what appeared to be the correct output. However I didn't write it down and when I put in the command again about an hour later after I took a break I also did not get an output until I re-entered the rip related commands.
