Cisco SG500 Switch - Can't Delete The Old Default VLAN
Jun 5, 2013
I have the new firmware running on my SG500 switch. I've also just finished creating my VLANs. My issue is that I can't delete the old default VLAN .... VLAN 1. More importantly, I can't seem to get DNS to work on the switch.
When I set a DNS server, the VLAN defaults to VLAN 1, and the option is greyed out and can't be changed. Why is it VLAN1? Why is it greyed out? How do I get DNS to work on the switch, for services like Time Servers?
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Mar 1, 2013
I have an SG500 that is already deployed with some Access VLANs on it. The PVID is still the default 1. I am trying to change it to 19 with as little interruption as possible. If I just go to the VLAN Management Tab and change the Default VLAN to 19 and reboot the switch, will it migrate my management IP to the default VLAN without any trouble? Would it be less interruption to: Create VLAN 19, assign it an out of subnet IP address, change a port to PVID 19, connect directly to that port, go to that IP address, remove the original management IP from PVID1, change all the ports to PVID19 then change the management IP back to the original?
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May 12, 2013
I know very little about switches. This is the first time I've ever touched them. However, I'm the only one in the company who has the slightest knowledge on how to make them work.
4 vlans
vlan 1 - 192.168.32.1 - Existing network with Internet access
vlan 33 - 192.168.33.1
vlan 34 - 192.168.34.1
vlan 35 - 192.168.35.1
From the laptop on vlan 33 I can ping the management interfaces (192.168.x.1) for each of the vlans. However, I cannot ping anything on those networks.
Below is what I have with the config. Right now not much attached to these switches until they are setup.
Code:
config-file-header
poe-switch
[Code].....
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Feb 4, 2013
Some background information of my current configuration.
VLAN 100
-Computer A
interface gi1/1/1
[Code]....
From computer A, i had run command prompt and ping 192.168.2.100(computer B) and successfully get a response. I had repeated the step but ping to a broadcast address (192.168.255.255) and it was unsuccessful.
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Jan 7, 2013
We have a problem with some websites being blocked every now and then. Everyone inside can access this external website for weeks, and then suddenly it's not available for a few hours, and then it comes back. All without me making any changes to the firewall, ASA5510. The external website that has nothing to do with us can be accessed from anywhere outside our network, example on my iphone through Verizon.
We have not set up any rules about blocking websites, all I found was the Default Service Policy. After backing up and then deleting the rule we are able to access all sites.
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Jan 22, 2013
I have just configured up a sg500 with a lacp trunk to an upstream switch.
I am getting native vlan mismatch on the individual ports of the lacp team.
24-Jan-2013 12:54:48 %CDP-W-NATIVE_VLAN_MISMATCH: Native VLAN mismatch detected on interface gi1/1/24.
24-Jan-2013 12:57:35 %CDP-W-NATIVE_VLAN_MISMATCH: Native VLAN mismatch detected on interface gi1/1/48.
[Code].....
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Dec 5, 2011
Is there any way to check if this VLAN is used by somedevice?
Cisco3560#sh ip int b
Vlan55 unassigned YES NVRAM administratively down down
Cisco3560#sh vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active
55 Print active Fa0/5, Fa0/6, Fa0/7, Fa0/8
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Jul 1, 2012
Working on a C4948-10g switch. Trying to reset switch to factory settings. I have ran the Switch#>wr erase, command but the vlan's are still in the config. If you do a show vlan it still shows all the vlan text. I have tried the Switch#>delete vlan.dat, doesn't work. Tried Switch#>delete nvram:vlan.dat, doesn't work. Tried Switch#>erase startup-config, doesn't work. How can I get rid of the vlan's?
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Mar 13, 2013
I'm trying to disable/enable ports via snmp v2 on a Cisco SG500-52P-K9-V01 switch. The communties are setup properly and I even have successful snmpset commands which when queried display that the action was complete. The issue is that when I disable the port via snmp the device on that port does not drop offline. This is a PoE port with a device powered over PoE so I'd expect the port to disable but also the PoE to turn the device off - neither happens.
Any experience with port management on this device? I also noticed the interface IDs (for port 1 for discussion) are 1, 101, 201 etc. I've tried setting on 1 and 101 only but the results have been the same and what were mentioned above.
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Feb 26, 2013
At our office we have a weird performance problem with the following switches and connectivity:
Internet |
SG300-24 (L3) core switch (in our server room)
|SG300-10P (L2) access swtich (in our meeting room) |
SG500-28P (L3) switch (in our meeting room)
We are building a new computer infrastructure that is connected to the the SG500-28P. As you can see above the SG500-28P in our meeting room has an uplink to the SG300-10P in the same meeting room. And again the SG300-10P has and uplink to the SG300-24 in our server room. From the server room, there is connectivity to internet. The network uses a multiple VLAN's and routeing between them. Bootom line is, the internet VLAN ID 10 is tagged to trunk ports and available on the SG500-28P. So client get connected straight into the internet based VLAN.
The performance on the SG500-28P switch itself from VLAN to VLAN is very fast. But... the uplink connection tot the internet and other VLAN's on the core switch are very and very slow! At least 10 times slower than normal. So if I plug a laptop in the SG500-28P and go from uplink to uplink, it is slow! But... when I connect the same laptop to the SG300-10P the connection with only one uplink it is fast. As if three switches is to much. I can't figure out why.
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Feb 3, 2013
I have a brand new SG500-28P sitting on my desk.
The swtich is configured and going to operate in L3 mode. All ports are still assigned to the default VLAN ID 1. I have created several new VLAN's. Once I configure and aplly an IP Interface to a certain VLAN the swtich becomes inaccessable right away. I am pretty sure I am not pulling my own VLAN under my connection. Every port is inaccessable. I have to pull the power plug and restart the swtich with its saved configuration. Even when I add another IP interface to the default VLAN 1, same issue. I have tried lot's of things, but can't get it to work properly. I have just upgraded to the latest firmware.
I have configured dozens of SG300 swtiches which is very easy. This one does not work with me.
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Jan 23, 2013
I've been given the task to clean-up our network config, and have walked into a disaster zone.We have a 4510R on site with everyone using the default VLAN, VLAN 1.I have created 4 new VLANS, VLAN100, VLAN150, VLAN200, VLAN250 I have assigned interface addresses to each VLAN and configured Inter VLAN routing.I can route to and from each new vlan with no problem, i.e VLAN250>VLAN100 VlAN100>VLAN200 etc but I can't route to VLAN 1(Default VLAN) from any of them, I can ping the interface on VLAN 1 from any VLAN , but any hosts are unreachable. On the flip side , from VLAN 1 I can route to all of the VLANS.
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Jan 10, 2013
I have two networks at two sites with a dot1q trunk between the two L3 switches at both sites (no routers involved)
SITE A - Cisco 3750 L3 - VLAN ID 50
10.10.50.0/24
SITE B - Cisco 3750 L3 - VLAN ID 50
10.20.50.0/24
I would like to extend the SITE A VLAN to SITE B so that I can move hosts from SITE A to SITE B without needing to change their IP address but the vlan ID is already in use. Obviously the easy solution is to change the VLAN ID for one or other of the sites but both sites contain hosts that run 24/7. Is there a way to join two VLANs with different IDs together.So for example I create a new VLAN 60 at SITE B and associate it with VLAN 50 at SITE A.
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Oct 12, 2011
I got question about Cisco SF300-24P- is it possible to have management vlan in other vlan than in default vlan?I have default vlan 10 and voice vlan 20, I need to reach switch through voice vlan so I need to set up, interface vlan 20 with ip address. I ask these, because in gui, under Management Interface, IPv4 interface,under Management VLAN, I can only choose vlan 10, which is my default vlan, I dont have option to set ,up, in this case, vlan 20 as management vlan.
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Dec 26, 2011
Currently, I have a Cisco 4948 in office that connects to a remote site via BGP. From what I am seeing, when connecting a new device to this switchport (we connect devices to this switch for a multicast VLAN that is set up), the BGP link fails after roughly 20-30 seconds. The switchport is not tagged with a VLAN, or any other config. Just a plain old port. This outage continues until the port is added to the mutlicast VLAN.
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Mar 17, 2011
I´m trying to configure a subinterface named Inside with vlan 1 but the interface stops work with this vlan.My switch is a Cisco and use the lan with vlan 1 too.If I change de vlan for other i.e vlan13 works fine. And all others vlans works fine too.Is there a problem to use the vlan 1?
My configuration is:
Cisco ASA:
interface gig0/3
no ip address
no security
no nameif
Interface gig0/3.1
vlan 1
nameif Inside
Securirity-level 100
ip address 10.x.y.x 255.255.224.0
The giga port of the swtich is configure to trunk model.
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Sep 23, 2012
I just got my Cisco SG300 28, but I have some problems getting the routing to work. I get the vlans to get to the router, with the default route. But not getting them to talk with each other. I can ping the IPs from the cisco, but I am not getting traffic to go from vlan 1 to vlan 2. When I try to google, it say that it should do it automatically, and I found no setting for it. It looks like it not creating any route for the interfaces.
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Dec 12, 2012
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
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Jul 27, 2011
We have recently purchased a Cisco SG300 and have been configuring it. [code] The VLANs have ACLs set up to prevent any communication between the Holly and Tempo VLANs (and their associated WAN VLANs).Each VLAN has a WAN available for it's use, which connects to external networks (including the Internet).In order to facilitate this, we have set up all the necessary ACLs and routes and confirmed that this all works.However, the problem comes when we assign the static routes that specify the default gateways.We add the two static routes below:
-0.0.0.0 next hop 10.10.200.254 metric 1
-0.0.0.0 next hop 192.168.200.254 metric 1
In this case, only one of the VLANs has WAN access. It is either Holly or Tempo (it can be either if the order the static route is added is changed).What we need is to force Holly to use Holly WAN and Tempo to use Tempo WAN, but we cannot see a way of doing this.Effectively, we want the following static routes: [code]
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Oct 15, 2012
I have created two vlans, vlan 1 data and vlan 200 voice. the issue is that when an on one vlan i cannot ping the default gateway of the othe vlan from my PC. An using sge 2010p switches.
below is my configuration
p route 0.0.0.0 0.0.0.0 192.168.0.1
ip dhcp relay address 192.168.0.100
ip dhcp relay enable
ip dhcp information option
interface vlan 1
ip dhcp relay enable(code )
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Jan 6, 2013
I am tring to configure ssh in cisco 4507.After doing so Ican see ssh connection establish from default vlan but getting failed from other vlan.rectify the ssh configuration so that connection estabnlish from any vlan.
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May 26, 2013
I have a cisco 876 with, c870-adventerprisek9-mz.124-6.T9.bin. I have configured a VLAN with ID 230, an SVI with IP 192.168.230.1/24 and I have assigned switch port fa 2 to it…
interface Vlan230
ip address 192.168.230.1 255.255.255.0
VLAN ISL Id: 230
[Code]......
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Jul 25, 2012
I have a design hurdle that I cannot seem to cross. I have two sites and I need the same VLAN to span both sites. I have accomplished this using L2TP but my issue is that I can no longer assign a gateway for this VLAN on the router. The 2 routers are 2821's and are connected with a dedicated fiber run.
Ant recommendation for how this could be accomplished? It would be great if I could have the same gateway at both sites by leveraging some sort of bridged interface (BVI so I've heard) but I am at a loss as to where I should start with this. Also, this is not the only VLAN that needs to traverse the link.
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Jun 2, 2012
I was searching a lot , but I couldn't find any good example, how to configure DHCP server for our wireless clients on Cisco Autonomous AP. I'm looking for example how to configure Dot 11 radios and BVI interfaces.
I have no problem to configure DHCP server on BVI 1 and VLAN 1 ( native VLAN ) interfaces, but there is a problem with other BVI's and VLANs. Maybe this feature isn't supported? Maybe DHCP server feature is supported to work just with default BVI and native VLAN?
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Mar 27, 2013
I'm really not clear about default-gateway on switch command, not the function but how its works.i have 1 multilayer switch (MLS 1) that have 2 vlan within it, vlan 2 and 100. on vlan 2 i assign ip address of 192.168.1.1 and on vlan 100 is 172.16.1.254. both vlans are up. then under that multilayer switch i added 2 more MLS (MLS 2 and MLS 3), and the links of MLS 2 and 3 to MLS 1 are trunking. and both MLS 2 and 3 have a same vlan with MLS 1. that i assign an ip address on vlan 2 in MLS 2 192.168.1.2 and i set default gateway 192.168.1.1, and i do the same to MLS 3 but the ip address of vlan 2 is 192.168.1.3i already setup the routing protocol on MLS 1 so that vlan 2 could contact vlan 100. but the fact it doesnt work at all, both MLS 2 and 3 cannot contact vlan 100 eventhough that are already have default-gateway setup, is there anything wrong with the configuration ??
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Jun 1, 2011
Unable to log in into our new ESW 540 switch because the default User ID and PW was changed. How do i restore the factory default on the switch.Can't get into the switch with CCA or explorer.
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Nov 2, 2011
3945 is running c3900e-universalk9-mz.SPA.151-4.M2
3560e is running c3560e-universalk9-mz.150-1.SE
I've got brand new 3945's with onboard 16-port 3560e switches. On the first power up I see that there are several new vlans added that appear to be default vlans..
vlan 2 name fst2
vlan 3 name fst3
vlan 4 name fst4
vlan 5 name fst5
vlan 6 name fst6
vlan 20 name VLAN0020
vlan 21 name VLAN0021
vlan 22 name VLAN0022
vlan 23 name VLAN0023
vlan 99 name VLAN0099
I deleted the vlan.dat and reloaded the switch but these vlans come back. What these vlans are intended for and is there a better way to get rid of them? What does "fst" stand for?
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Nov 1, 2012
We have a 3560 switch behind a ASA 5510 at a site that we are trying to access via telnet over the internet, we find out the switch does not have a default gateway configured. So I configure the following rule on the 5510: [code] Try accessing the switch, and all is good. One of our change control steps is to identify any others are connected to the device via: [code] I see the connection and show users command return 172.16.30.15, as expected. How is it possible that address can connect to that switch.
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Dec 23, 2012
I just received a Catalyst 2960-C (WS-C2960C-8TC-L R) switch and I am unable to sign into its web GUI in order to configure it. I've tried both the Cisco Network Assistant and Internet Explorer and I am unable to log in either way. The documentation provided by Cisco states that the default password is simply cisco and that a username is unnecessary. Needless to say, it doesn't work. I've also Googled for other default passwords (such as cisco-cisco as the username-password), none of which worked either. I've also tried resetting the switch back to its factory default a few times.
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Aug 25, 2012
I had setup a lan infrastructure with 5 3750 stack swithes. In these 3 of them are in one stack which is acting as access switch, 2 of them in another stack which is as core switch where all the SVI is configured. Now, when i tried to ping from our edge pc which is connected in access switch to default gaeway, which is configured in core switch, the ICMP is getting delayed . But when try to ping from the same edge pc to another user PC, it is getting less tahn 1 millisecond icmp replies.
why icmp is delaying to default gateway , but working with another edge to edge pcs without any delays?
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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.
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Aug 14, 2012
4500 switch is connected to 2960 switch.
4500 config
Vlan 10
name Data
It has ip helper configured that points to DHCP.From 4500 switch port - port x connects to 2960 port.Port x is configured as trunk between 4500 and 2960.
2960 config
vlan 10
name data
All user ports are configured under vlan 10 and as access ports.Port x is trunk port connected frpm 2960 to 4500 switch allowing vlan 1 and 10 only.This switch has no default gateway configured.
We connected user PC on 2960 switchports and they were able to get the IP from DHCP server and were able to access the network? My question is how users on 2960 switch are able to access the network without ip default-gateway configured on 2960 switch?
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Jun 13, 2011
For test I used 2 Switch that name "ESW X" and "ESW Y" I have 2 network that I named "Network A" and "Network B" I build 2 VLAN for each network that named Vlan 2 for Network A and Vlan 3 for Network B, I don't use Vlan 1 because it's the default Vlan
Configuration ESW X:
port e1 : ACCESS PORT on UNTTAGGED Vlan 2
port e2 : ACCESS PORT on UNTTAGGED Vlan 2
port e3 : ACCESS PORT on UNTTAGGED Vlan 3
port e4 : ACCESS PORT on UNTTAGGED Vlan 3
port g3 : TRUNK PORT with UNTTAGGED Vlan 1(default) and TAGGED Vlan 2 and Vlan 3
[code]....
Each Vlan can't communicate between the two switch, I think they're a problem in my vlan/port configuration?
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