Cisco WAN :: 4948 - BGP Breaks When Device Connects To Default VLAN
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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Apr 5, 2013
So I've got an odd issue here, have an older 4948 that I'm trying to setup on our management vlan so i can manage it from another host connect to the switch. I can't figure out why its not working. Below is the config
vlan is 64 and all the trunk and access ports that are on vlan 64 are working just fine. Just can't hit the switch from a machine on the 64 vlan.
!
interface Vlan1
no ip address
[Code].....
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Dec 9, 2012
In my setup , i have one core switch 4506, 3750 access switches and 4948 server switch.i have created the mngmt VLAN in every switch.the problem is i can ping the every device mngmt ip from any internal network,but my server switch mngmt ip i am not able to ping.trunk link is configure between the core and server,access switches.What is the problem with 4948 switch?
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May 19, 2013
In my core Switch,there are 2 v LAN(V LAN 1 & V LAN 2)my switch is Cisco 4948,so be default ip routing is enable in it. My all servers (DHCP,HTTP,HTTPS) are in v LAN 1 & internet is also in v LAN 1.
My requirement is that v LAN 1 user should not communicate with the v LAN 2 and vice versa. But the v LAN 2 users need an access of all servers and internet which is in v LAN 1. How to configure the access-list. I have try on Packet tracer which i have attached.
note:v LAN 2 user should get the IP from dhcp server which is in vlan1.
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Sep 24, 2012
Current Situation:We are able to reach server IP -10.203.206.40 from our 4948 switch vlan 10.30.1.0/24 through the Layer 3 interface between 4506 and 4948.
Requirements
==========
1) Now we would like to add one more L3 interface between 4506 & 4948 for redundancy purpose.
2) Make available Vlan 540 in 4948 from 4506... need to create two trunk links between 4506 & 4948 and allow vlan 540.
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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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Feb 15, 2012
I have broadband with a d link dir 601 router hooked to it.it's about 2 years old. My sons computer is straight hooked to the internet while I use the wireless in another room.I have no problems with it until about a month ago, my daughter comes over with her laptop and uses the signal, then all of a sudden it takes pages etc on my laptop forever to load. I have windows xp on mine, she has 2 laptops she switches from, 1 with xp,1 with 7.
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Mar 19, 2011
Internet: Comcast
Modem: D-Link DCM202
Router: D-Link DIR-655
Scenario: An alternative router was temporarily swapped into my network. After reconnecting the old equipment only network device is able to connect to the internet. My computer, the only device with access to the internet, seems to automatically resolve a Comcast IP, but all other devices obtain an address in the 192 range. Setting the IP address statically to the 192 range kills connectivity. The router continuously tries to obtain the IP information from the modem, but never does.
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Oct 22, 2012
How do I fix the problem". Domain not set.invalid may not be the problem. had a power surge at my house and it took down my internet. I had to reset my router back to factory settings and I finally got the router to work with my PC. But I cannot access the internet from my iPad 2 or my Android phone. Both devices see the network and can hook up to the network but the internet is not working on either device.
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Aug 4, 2012
I'm trying to NAT to a device that doesn't have a default gateway; effectivley we want to talk to the device as if we're on the same LAN but using only port 80.Here's the setup:
Remote Device on LAN A <-> RA <-> Remote router WAN A <-> ISP <->--
--<->ISP <-> Remote router WAN B <-> RB <-> Remote Device LAN B (no default gateway)
We're using Cisco IOS on 877s and I'm sure this can be done
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Apr 20, 2011
I am ordering ASA5505-UL-BUN-K9. By default device comes with which IOS version?
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Feb 27, 2012
A customer got a new VoIP PBX, and now I have to forward port 443 on the ASA to the PBX for remote administration purposes. The LAN-interface of the PBX is in the same subnet as the ASA but has an external VoIP-router as default gateway and not our ASA. Is it even possible to forward the port to the PBX when there is no route of any sort to our ASA on it?
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May 21, 2013
Does ip default-gateway have any effect on a L3 device such as a 2811 router? I always thought that on a L3 device the default route would supersede any such command assuming it is accepted.
We have a client device that cannot be reached for managment directly and wanted to add that statment only if it might work.
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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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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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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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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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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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Jul 13, 2011
Using a sg300-52 switch I created two VLANs that share a port for access to the internet. All original devices added to the VLANs are functioning correctly so I have to beleive the VLANs are set up correctly. I added a new desktop and an old laptop to the VLAN and neither worked. I was able to get the desktop to work by enabling VLAN tagging in the network adapter. The laptop is 5 years old and it does not have any such setting in network adapter. There are 2 other devices that share the same port with the laptop and they both function properly. My conclusion is that the laptop does not support VLAN tagging. Is there someway to configure the switch to account for this?
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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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Jun 10, 2012
how to configure vlan tag on routed layer 3 interface in cisco 3945 device?
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Feb 12, 2012
I have a Cisco SG200 26 Port Switch, 2 Cisco WAP4410N Access points, and a VLAN aware Router. I have created 4 VLAN's. For the sake of this conversation lets call them.
98 - Intel Vpro
99 - Management
100 - General
101 - Guest
The Access points are capable of doing V LAN tagging so I plan on having them tag a guest network as V LAN 101. That can get sent to the V LAN aware router and out. No problem. I have some devices, or management pages that I don't want accessible from the general network. (Intel V pro KVM, Remote Management Cards, AP Config Menus, Switch config menu...) . I need to be able to take a V LAN unaware device, plug it into port 1, and have it communicate with V LAN 98, 99 and 100.
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Dec 26, 2012
My internet is typically just fine but when I try to use LAN it cuts in and out every few minutes, which as you can imagine ruins everything. Currently using wi-fi as my Ethernet port somehow has ceased working. No other computer wired or wireless in my house has this problem.
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Aug 30, 2012
I have 3 routers all running OSPF. each of the three routers have 2 networks they are advertising..NAT Overload breaks OSPF Adjacency
[code]...
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Jul 31, 2012
I am getting drops in MRTG graph. Pgm nhiPoller[Net]: Received large delta from 'hyd-rt3845-01-GigabitEthernet0/1'. Poll is dropped (OID in error is ifInOctets. Delta is 3989641522. Old value is 4239690170. Current value is 3934364396.).
[Code]...
What could be the reason for the polling drops and is it IOS bug.
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Aug 17, 2011
I have an ASA 5505 running 8.2
I used the ASDM wizard (6.3) to set up a remote VPN. After slightly adjusting the wizards configuration the VPN is working well.
Now I need to change the Outside interfaces IP address. When I do that the VPN no longer works. If I change it back to the original value the VPN works again.
What configuration changes do I have to make regaurding the remote VPN after changing the outside interfaces IP address?
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Dec 1, 2009
I have upgrade the firmware on several RV082 (and RV042) model routers, and all of them have had subsequent WAN connectivity loss. The WAN works for a while, then stops working until the router is restarted, then fails shortly thereafter. I would assume it was some configuration corruption on incompatibility with the upgrade, but the symptom has been universal. EVERY 2.x upgrade I've made to a RV082 or RV042 router has exhibited this symptom. Reverting to the 1.3.98-tm firmware fixes the issue.
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