Cisco Switching/Routing :: SG300 CLI Show ARP Returns Bad Parameter Value
May 7, 2013
I'm trying to examine the ARP table on specific phy ports on a SG300 switch. The Cisco CLI guide shows this syntax:
show arp [ip-address ip-address] [mac-address mac-address] [interface-id]
Using the CLI and the "?" key to get assistance, I'm not successful:
switch3#show arp
configuration Display ARP related configuration
ip-address Filter ARP show by IP
mac-address Filter ARP show by MAC
[Code]...
I don't have http server enabled, I prefer SSH and CLI to do my work.
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Jan 19, 2012
We have a number of 4507s. Most are managed via VLAN 1 address. All have multiple VLANS for traffic control. When I do a show ARP or show IP ARP the command only shows VLAN 1 info. No entries for any of the other VLANS on the switch.
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Oct 15, 2012
I am designing a network for my client where I have to implement a 10 Gig end to end connectivity. The major factor of concern from my management is about scalability (space to include more 10Gig servers as the nodes grow up). I have suggested Cisco 5596UP with 2232 PP as this gives ample amount of 10Gig ports. The setup has to be implemented across 2 different datacenters located 40 Kms apart, connected with 10Gig DC Interconnect.
I understand that Cisco Nexus 2232 is a Layer 2 Only switch and would need to communicate with parent 5K switch very frequently. Is it necessary to have the 2K and 5K pair in the same datacenter or in proximity? Is it possible to have the SFP uplinks connected to the DC interconnect? Because we have two datacenters located 40 Kms apart and having 1*Layer 3 - 5K switch at DC A with Layer 2 - 2K nexus Switch at DC B will be cost effective. We do require more 10Gig ports and not much requirement on Layer 3 usage. What are the type of communication that would be much frequent between 2K and 5K?
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Mar 13, 2013
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.
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May 27, 2012
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]
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Dec 4, 2011
Running the newest firmware available
$ show version
SW version 1.1.2.0 ( date 12-Nov-2011 time 23:34:26 )
Boot version 1.0.0.4 ( date 08-Apr-2010 time 16:37:57 )
HW version V01
This is how I can cause the reboot to happen every time.
$ show lldp neighbors GE 10
Device ID: <mac address>
Port ID: 22
Capabilities: Bridge
[Code]....
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Feb 5, 2012
I recently set up a small photography business and am trying to get a Cisco 877 and Cisco SG300-10 switch to talk to each other.
What I want is for the Cisco 877 to handle the internet and the SG300-10 to handle the local network,
I have set up 2 vlans in trunk mode on the switch and want vlan2 to manage local traffic and vlan3 to handle the internet.
I have got the 877 connecting to the internet what I dont have, traffic going to vlan2 on the switch from the 877
Look at the running configs for the switch and the router and tell me how to get the vlan on the router to pass traffic to the switch. In a nutshell I am inserting the internet into the switch but am not sure how to progress. I have the c870-advipservicesk9 image file on the router.
Switch Config
interface gi2
description connection-to-data-vlan
exit
interface gi3
description connection-to-internet-vlan
exit
vlan database (code )
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Dec 8, 2011
I am currently having an issue with connecting a Catalyst 2960-S switch to a Small Business SG300 switch. When I connect them they are unable to form a link. When I do a show spanning-tree it says the mst link is in dispute.
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Aug 30, 2010
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)?
877ROUTER#sh dsl int atm0 ATU-R (DS) ATU-C (US)Modem Status: Showtime (DMTDSL_SHOWTIME)DSL Mode: ITU G.992.1 (G.DMT)ITU STD NUM: 0x01 0x01Vendor ID: 'ALCB' 'ALCB'Vendor Specific: 0x0000 0x0000Vendor Country: 0x00 0x0FCapacity Used: 31% 85%Noise Margin: 34.0 dB 10.0 dBOutput Power: 16.0 dBm 12.0 dBmAttenuation: 10.0 dB 6.0 dBDefect Status: None None Last Fail Code: NoneSelftest Result: 0x00Subfunction: 0x15Interrupts: 1453 (2
[code]....
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Dec 10, 2012
I am trying to configure Cisco SG300-52 switch for the first time and stuck without CLI configuration option. The configuration can be done using GUI, however, configuring using CLI would be more comfortable (as I am used to work with CLI of other Cisco switches)..
I was able to lo gin to switch using SSH, but the CLI appears in MENU format and was not able to find any way to go to CLI mode.
As per some blogs, in SG300 switches CLI mode can be accessed using Ctrl + Z in Menu, which did not work either in my case.
Switch is running with latest firmware version Sx300 Firmware Version 1.2.7.76.
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Feb 28, 2012
I have three Cisco SG300-28 switches. I setup a test lab environment with a core (server) switch in Layer 3 mode and the rest are (clients) in Layer 2 mode. As I understand, these switches doesn't support VTP, only GVRP. And GVRP works the same with VTP. Whenever you create VLANs on the core or main switch, other switches will learn from the core switch and no VLAN creation for the client switches will be made. (Hope I got it right. I guess GVRP is more complicated than VTP). I want to use GVRP to create VLANs on the main switch so that I won't be doing it all over on the other switches. The following is my (so far) configuration through CLI only:I haven't use the web GUI. My SW version is 1.1.2.0.
1. I already enabled the GVRP globally.
2. I configured GE 12 & GE 24 as TRUNK ports for the core switch that connects both switches, I also configured GE 12 ports for both the client switches. All other ports are in ACCESS mode. (I am connected to GE 2 port)
3. I enabled GVRP on the TRUNK ports only for all switches.
4. I allowed all vlans on the TRUNK ports. (#switchport trunk allowed vlan add all)
5. All TRUNK ports registration mode is NORMAL and dynamic vlan creation is enabled on all trunk and access ports.
6. I created 3 VLANs without configuring its IP Addresses:
-vlan 2 = MGT
-vlan 3 = IT
-vlan 4 = MKTG
I don't know if I missed something on the configuration or the connection.
1. Is it necessary to enable all switches to layer 3 mode? Or depends on the network setup? Does this affect the GVRP?
2. Does switching ports to TRUNK mode means they are already 802.1q ports by default? Because I can't configure TRUNK ports to 802.1q (#switchport encapsulation dot1q) config like other switches. [code]
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Jun 20, 2012
try to configure QoS on a Cisco Small Business SG300 Switch. I followed the instruction on [URL] and configured one Port for tagging my Traffic from a Aastra IP Phone. Tagging works fine (i verified with wireshark).The problem is, that all traffic to a PC connected directly to the Aastra IP Phone is blocked. Is there a possibility to tag any other traffic to the port as a default?
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Jun 6, 2012
I just purchased an SG300-10 (negular, non-POE) and planning on using it with no special configuratinos initially. Longer term, will be using VLAN and QOS for VOIP.What I would like to know is if ports 9 & 10 can be used as standard copper cat5e ports, or are they only useful for special purposes? When I hookup my router/firewall to port 1 it all appears to work. If I hook it up to 9 or 10, the port lights do not come on and it doesn't work. I read that ports 9 & 10 don't have POE on the POE switch, but I assumed that all 10 ports would function with cat5e?
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Apr 10, 2012
We are using the SG300 series switches, and have come across an issue where we need to block ARP broadcasts based on IP.
we have multiple computers, each with only one ethernet adapter, each adapter has two IPs configured, 10.10.10.x and 192.168.0.100.All machines have the same 192.168.0.100 address (Used for applications/hardware running locally to that machine and this IP cannot be changed).
When the machines are connected to the network, ARP is advertising BOTH the 10.10.10.x address and the 192.168.0.100 address.
As all machines have the same 192 address we receive IP conflict notifications on each machine.
How can the ARP broadcasts for the 192 address range be blocked?
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Mar 13, 2012
I'm looking to configure the QOS for VOIP on my network.I have a switch SG300 and several no Cisco VOIP phone. What are the parameters to be taken to implement the QOS?
What is the procedure for installing the QOS? I need to create a VLAN for the data and one for VOIP?I read in the quick start guide that there is auto-QOS for VOIP?This can be done from the GUI? what are the options to put?
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Jul 19, 2012
I have an SG300, configured with several VLANs. I'm replacing a E3000 with the RV180, I've got it in the environment, but I can't seem to get to the internet from hosts on the SG300.
I have Port 4 on the RV180 connected to Port 20 on the SG300...Port 20 is in the native VLAN (VLAN1) and VLAN1 is configured as a trunk. I'm relatively new to networking so I'm not sure where to start troubleshooting. I have the default route on the switch and I have the static routes for the VLANs on the router, should I be using tagging someplace?
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Feb 28, 2012
I have a new redundant network with two cores C1 and C2 and five access switches A1 to A5. They are all Cisco SG300 switches. I have noticed there are too many STP messages emanating from one host which has a MAC address which cannot be traced on the network. In the redundant network, I made C1 the root bridge by giving it a priority of 4096 and C2 has been given a priority of 8192 so that it is the secondary root bridge in the network. I have left all other STP settings to default on the rest of the switches in the network.
The problem is that one host is advertising a RST root bridge all the time. Now it has a mac address which is different from the mac address of the root bridge itself and i cannot trace this mac address on the network. Look at the snapshot of Wireshark output in the attach.The source MAC address which is the host advertising all the time is 1c:df:0f:34:db and the root bridge is 1c:df:0f:bb:34:c4.
Why would the root bridge be resetted all the time?I've also noticed that one port in a LAG configuration on one of the access switches is flapping up and down all the time.I tried to troubleshoot this problem. It is not the cable. It would be something else. What could cause this flapping of the port?Could it be related to STP?
On the other Core switch C2 I can see a LAG status switching between forwarding and blocking all the time. What could make the LAG status to flap from forwarding to blocking and back all the time like this?
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Apr 7, 2013
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.
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Feb 24, 2013
I have encounterd a broplem on my Cisco 805 model.
When i use the command "show ip interface brief" the status shows "up" but the protocol is "down" on my serial interface.
The link between my to sites is down after this happend.
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Sep 3, 2012
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.
Switch#sh invNAME: "1", DESCR: "WS-C3750X-24"PID: WS-C3750X-24T-S , VID: V02 , SN: FDO*******D
NAME: "Switch 1 - Power Supply 0", DESCR: "FRU Power Supply"PID: C3KX-PWR-350WAC , VID: V01D , SN: DTN1533L00N
NAME: "2", DESCR: "WS-C3750X-24"PID: WS-C3750X-24T-S , VID: V02 , SN: FDO*******6
NAME: "Switch 2 - Power Supply 0", DESCR: "FRU Power Supply"PID: C3KX-PWR-350WAC , VID: V01D , SN: DTN1533L08M(code)
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Apr 3, 2013
I have a cisco L2 SG300-10p Managed switch . I want to configure one port as a turn but cant find the command Encapsulation dot1q . Its a poe switch i want to use for both internet and voip in separate vlans.
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Jan 31, 2012
it says that the cisco sg300-28 managed switch default system mode is Layer 2. but i want to change it to layer 3.
i can't get inside the "Console Interface Main Menu" where the switching from L2 to L3 will be done.
I have done the ff:
1. Upgraded firmware to 1.1.2.0 (latest)
2. Reset the switch to factory defaults.
3. The guide stated that in order to perform telnet to the switch, you need to enable it. So I logged in first in to the web GUI and enable telnet service.
4. I can now start telnet on the switch but I can't see the "Switch main menu".
All I can see are these lines from telnet:
User Name:cisco
Password:******
switchd5928c#
I just want to know how to get into the console interface main menu where these lines should appear so that i can change the system mode:
• System Configuration Menu
• Port Status
• Port Configuration
• System Mode
• Help
• Logout
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Jun 1, 2012
I'm looking for feedback and constructive criticism on our network redesign project for our company.We are currently on a 192.168.1.x/24 and running out of addresses. We are looking to move to the following design and implement VLANs as well for segregation and security. We are probably going to use a few SG300s for switches. [code]
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Jun 1, 2012
Can a Cisco SG300-10P switch power a Cisco SG200-08 switch over POE? Or an SG200-08P power an SG200-08 via POE? I have an area where I'd like to put a small switch, but would like to avoid having to have electrical power run to it. Or will the SG300 and SG200 POE switches only power endpoint devices such as cameras and IP phones?
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Aug 27, 2012
A client of ours has installed an SG300-24P switch and would like to setup a LAG between the SG300 and the 3560 switch we manage for them. They would like the LAG to also pass the voice and two data VLANs currently in use; 5, 10, and 100 respectively. I configured the two ports as an Etherchannel with trunking on the logical port, but no luck. I reconfigured as follows:
interface GigabitEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode active
end
[code]....
I see no output when I do show lacp nei. At this point the client is looking to use for the configurations to use as he does not know how to setup the SG300 and it is a switch I have never dealt with. I have found some configurations that I believe would allow a single VLAN across, but nothing I believe will allow the LAG to pass all the VLAN's.
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Apr 20, 2012
I am having trouble with my Cisco SG300 switch big time. I have two servers with IP addresses 10.17.0.11 and 10.17.0.29 sitting on the same switch which is a Cisco SG300. I initiate a file transfer from 10.17.0.11 to 10.17.0.29. I could see lots of Dup Acks and retransmissions which means something is wrong in the connection. Further, I could see the session initiation a bit bizarre. I could see two SYN packets sent from 10.17.0.11 to 10.17.0.29 and also two SYN ACK packets returned by 10.17.0.29. The switch forms part of a network but since both the servers are sitting on the same switch I suppose the rest of the network doesn't come into play when one server talks to the other.
See also the number of Dup Acks and retransmissions. The two switch ports connecting the servers have speed and duplex set to auto negotiate, flow control is enabled. What could cause this sort of problem?Could it be any setting on the switch or the servers' NICs?Or could it be a bad switch that causes this?
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Dec 12, 2012
I have an sg300-10 unit. I have recently swapped it into my LAN network to replace an aging switch that was exhibiting problems.
The SG300 is reporting near constant 100% cpu load with 11pps input. there are only 3-4 active ports on the switch at a given time. One of those ports does lead to my router and another switch with another half dozen devices.
By itself this doesn't concern me overly much, but I have found that the SG300 is occasionally freezing up for about 20 minutes then restarting. Syslog and SNMP traps don't appear to provide any hints as to what is going on.
I have tied my switch into my monitoring system (packettrap MSP, so if there is something I should be watching that I am not, that would be good to know). I am still troubleshooting getting all the monitoring functions working as well.
So, I have some questions there as well, which OID should I be monitoring for CPU utilization?
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Apr 16, 2012
I am trying to setup VLAN's in the company I work for and I am almost there but missing the part when the internet works.I have an SG300 as a L3 Router IP 192.168.0.93.I have created VLAN20 and VLAN40 Assigned VLAN20 192.168.2.1 and VLAN40 192.168.4.1
The static routes have been created and a default router going to the Sonicwall firewall at 192.168.0.1.Port 24 is configured as Untagged VLAN1, Untagged VLAN20 and VLAN40 in trunk mode and going to the Sonicwall NSA 2400. [code]
Working to move all 192.168.0.x network off of VLAN1 and move it a management switch.I have DHCP helper on pointing to the DHCP server.Both VLAN's once the DHCP server is configured to Gateway 192.168.0.93 can get an IP from the correct subnet either 192.168.2.x or 192.168.4.x
All PC's are getting a GW IP of 192.168.2.1 pr 192.168.4.1.All test PC's on both VLAN's can ping each other and any server with the correct GW.When I try to ping google.com or open a web page and try google.com it times out.
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Nov 8, 2011
I need the conception of the local network for my company. I have seen the sg300 switch that can be good for me (excuse my bad english, i am french). I have 12 servers (database + file servers) that i want to plug on the sg300 20 ports. I want to plug on it 3 switch sg300 52 ports that contains ipphone, desktops and printers. (about 70 users)
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Apr 14, 2012
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.
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Mar 25, 2012
I change only a chasis in a router 3845, but the "show version" command should be the same , except for the serial number and other parameter of time.. however, the number of serial interface change from 4 up to 2.The hardware module of 3845 are 3.
1.- VWIC E1/T1 with 2 port
2.- Fastethernet 36 port
3.- Supervisor engine with 2 Gigabit port
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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)
[Code].....
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Feb 7, 2012
Configuring FWSM in a 6509. When I set "firewall vlan-group 40 40-42,251", it results in: "No more than one svi is allowed. Command rejected.".
I had "firewall multiple-vlan-interfaces" set for a previous use of this module, but took that off with the "no" command. Suspect that is the issue, but do not see how to resolve. Seems similar to bug CSCsr48563, but I am at the fixed code for that bug.
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