Cisco Switching/Routing :: 4X SGE2010 / Two Root Bridges In Network
Oct 16, 2012
I have a setup where - I have a cisco stack (4X SGE2010 Switches) trunking over to a 3COM switch. Both switches believe to be the "ROOT" of the network. Note The 3COM is running RSTP as opposed to the Cisco Stack which is running normal STP. To my understanding of STP - Essentially STP is not functioning! Both switches believe to be the "ROOT" so they don't shut ports down. (We are currently having major issues with ports going up and down for seconds at a time on both switches)
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Apr 1, 2013
I have two locations DC and Corp connected to each other via Point to Point Circuit. I have forced the two core switches setup as GLBP pair to be primary and secondary for certain VLAN's including VLAN1.I have a switch in our Corporate office 3750 which is where the point to point circuit terminates. VLAN1 SVI is manually shut on that switch. Also the priority on VLAN1 is increased manually like this, "spanning-tree vlan 1 priority 28672".
Now the issue is that the Primarey Root Bridge in the DC is the root bridge for VLAN 1. But this other switch 3750 in our corporate office also is a root bridge for VLAN1. [code]
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Oct 18, 2011
i got the problem with 1300 bridges,root bridge with omni antenna and non root with sector antenna , it can associate and can pin each other , but whenever i try to browse several web pages its get timed out and radio was down.
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May 28, 2012
I have a hybrid kind of network. I want to create create two VLANs on Cisco SGE2010 so that these two VLANs should not talk each other but at the same time they are able to talk Domain controllers, DHCP and other servers which are on other switches.I am able to create two separate VLANs but they stop talking with other servers(DC, DHCP, etc) which are on another switch.
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May 4, 2012
I am having some issues on my network and i think i have narrowed them down to a single switch.
On this switch the following logs can be seen
2147482407 05-May-2012 15:40:54 Informational %AAA-I-CONNECT: New http connection for user admin, source 10.0.5.135 destination 10.0.5.172 ACCEPTED
2147482431 05-May-2012 09:03:31 Warning %STP-W-PORTSTATUS: g13: STP status Forwarding
2147482432 05-May-2012 09:03:01 Informational %LINK-I-Up: g13
[code]......
All other switches are OK and do not show anything in their logs. I am trying to figure out what could be going wrong. Spanning tree is enabled on all switches. The switch tihs is happening on, ends in the ip 172 and is where all building cables connect to. They also connect to 174. I have attached an image of the infrastructure so you can visually see what i mean.
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May 16, 2012
I have 4 SGE2010P switches in L3 stacked mode in my production environment. I am having trouble routing traffice to/from my vlans. I have successfully set this up in a test environment and have compared switch settings, but still having trouble in the production environment.
Main network:
192.168.0.0/24, DG 192.168.0.1
Vlan 1 interface on switch: 192.168.0.253/24
Vlan 22 interface on switch: 192.168.22.1/24
Vlan 23 interface on switch: 192.168.23.1/24
I have assigned port 1/g14 to Vlan 23. I have enabled DHCP Relay and Option 82. I have set DHCP interface to Vlan 23. Static routes auto-genned as shown in image below. My DHCP server is on 192.168.0.16 on Vlan 1. It has a scope for 192.168.23.0/24 to give a DG of 192.168.23.1 (Vlan 23 IP address).I cannot get DHCP to give me an address from the .23 scope. So I tried to hard code an IP address into the client. When I did this, the switch sees the machine just fine, I can ping 192.168.0.253 (Vlan 1 IP address), but cannot ping any other IP on Vlan 1 (192.168.0.0/24)Do I need a static route somewhere that I am missing? I didn't need to on my test network, so I am a bit stumped.
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Mar 18, 2013
I can't connect to the console of switch cisco sge2010, I tried several console cables and none worked for me, I followed step by step manuals and nothing.
Also try the web 192.168.1.254 according to the manual but when I connect from the laptop to do ping to the switch doesnt work.
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May 4, 2010
I realize this is just a small business switch, basically a rebranded Linksys, but why I'm only getting 200Mbits/s
- 48 port - 10/100/1000 , set to standalone mode
- 3 separate PCs on this switch , all are fast machines with Core 2 duo / plenty of RAM etc...
- all 3 auto-sense 1Gbps connection
I use iperf tool for bandwidth testing and no matter which PC I pick as server, which as client I get about 150 to 250Mbits/s
I am not looking for full 1000 here, but 200 seems rather sad....
- jumbo frames seem to make no difference
- I am using TCP test in iperf , standard no extra flags , 10 seconds, 20 seconds or even 30 seconds all come out the same.
- wiring is shady as some of it is just Cat5 , but when going from one laptop on the switch to another with brand new Cat6 cables I STILL only got 200.
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Feb 16, 2013
I config vlans 21-23 on 3750 A and B switches.I config B switch to be Root Bridge for all vlansspanning-tree vlan 1,21-23, priority 4096 sh span tree on B switch 3750B# sh spanning-tree.
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Feb 11, 2013
I have two 6509s both with single FWSMs running in transparent mode with bridged Inside and Outside VLANs.I have my Core A set to STP priority of 8192 and Core B set to 16,384 to make Core A the root for all VLANs.Problem I have is when I look at spanning-tree on Core A for Inside VLAN 324 it states to get to the Root go via PO100 (Cost of 9) and that the Root also has a Priority of 8192, but as the designated Root has a lower MAC address it's pointing to the etherchannel. PO100 is L2 Etherchannel between the Cores.Moving accross PO100 to Core B and running the show spanning-tree command I can see that to get to the Root Bridge I need to go via PO272. PO272 is the internal Etherchannel to get to the FWSM on the Core B Switch. This shows a cost of 6 to get to the Root and a mac address of the Root Bridge which resides on Core A (Outside VLAN 124)To give some perspectibe,theoutside VLAN of the pair has it's STP ROOT on the Core A switch as intended?
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Jan 18, 2012
I have an Extremely Old switch that I need to connect to my network. Because it is so old I don't want it to become the Root Switch.
what is the command to change the priority. (Honestly I don't remember if it has to be a lower number 1 or a higher number ). Always get that mixed up. I've read about root guard, but I would like to prevent it manually. (It is a small network after all)It is a Cisco 2950.
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Jan 12, 2012
I have 2 3550 12G switches that I use as core fiber switches. Switch 1 is the primary for 1/2 the V LANs and Switch 2 is the primary for the others using MST with 2 instances (I am not including the default 0 instance). I am using HSRP to provide redundancy. So far so good.
Recently a tenant in my building would like to use their own switch for data but still needs access to a V LAN on mine for voice. Again not a problem as I can configure a trunk port and give them what they need. My concern is that if they try to configure STP on their switch can they take down mine. Are there some preventions that I can put into place, such as root guard, that work with MST? What happens if they too set up MST can they kill mine?
Switch 1 is the root for 1/2 the v lans and Switch 2 is the backup root. The scenario is flipped for the other 1/2.
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Oct 12, 2012
Our environment consits of 4 cisco SGE2010 switches (stacked). I have implemented STP BPDUGUARD and Portfast on all client ports (suspected a loop). And our uplink to the Server DMZ recieves almost all of it's BPDU packets back(is that normal?) The issues lies where we have random ports dropping out - across all stacks for seconds at a time. We get errors/warning such as,Pinging between the DMZ network appears to be fine. Pinging from the client/switch network show packets being dropped quite frequently.All devices are on VLAN1 (I've have researched this and this could be the cause of the issue)
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Jun 26, 2012
1 Cisco switch stack (SGE2010) in L3 mode, 2 Vlans.
Vlan 1 = 192.168.0.253/24, untagged on all ports except 14/15
Vlan 2 = 192.168.22.1/24, untagged on port 14 and 15
SGE2010 default route 0.0.0.0/0 next hop 192.168.0.1 (Checkpoint UTM)
DHCP Relay enabled
DHCP server set to 192.168.0.16
DHCP interface set to Vlan2
[code]....
Expanding the ICMP entry, it appears that the destination is the pc client since it shows a Dell mac address, and the source is the Checkpoint UTM (Sofaware).
I can ping and tracert from the Checkpoint to my static IP on Vlan 2. The same goes for the DHCP server to/from Vlan2, so I am confused as to why the routing is failing. I have tried adding Port Fast to the stack ports, but nothing changes.
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Dec 15, 2012
in my LAN the all access layer switchs/stacks are connected directly to core backbone switch (cisco 6509) via sfp fiber-optic, i want to protect my spanning tree setup with the "root guard" command.
1. where would i set this ? on uplink ports on access layer switches ? or on core backbone ports to which the access layer swithes connect to?.
2. can this be set on active (production) ports without downtime?
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Nov 13, 2012
I have a cisco 3560 8 port switch. I really would lime to have the webinterface enabled. So i downloaded the archive from cisco. I extracted the archive to the flash of the switch. After rebooting the device everythings looks fine, but the html folder is a subfolder. It looks something like this: flash:c3560.../htmlI my understanding to enable the webinterface the html folder should be here flash:htmlHow do i move the html folder from the subfolder to the root?
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May 3, 2013
We have a problem with a Cisco 1400 Bridge. This equipment can not bridge to the other root or not root mode. I can see a message "Interface Dot11Radio0 Radio transmit power out of range" and the MAC Address of Dot11Radio0 appears with 0000.0000.0000.I set the local power to 18 but the MAC Address is still in 0000.0000.0000.
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Jul 18, 2011
Any working configuration between two BR1310's in Root/Non-root mode? The documentation is vary vague and i can't find anything more secure than WEP. Is it possible to use WPA with radius authentication?
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May 11, 2011
For a while now i have been making netowrk bridges to connect my laptop's wireless router to my ethernet port, and every now and then i delete the bridge and make it again. for some reason, a couple of days ago, while trying to make a bridge my laptop said "an unexpected error occured while trying to configure the network bridge"
[code]...
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Apr 24, 2012
Can I associate the non-root bridge model 1310 to the root bridge model 1400? Is there any problems on the configuration I need to be aware of?
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Oct 3, 2011
I've recently installed an SGE2010 switch, which I have set to 'Layer 3' mode.
I have created 2 VLANs using 192.168.10.x and 192.168.20.x (using .50 for the VLAN IP address in each case) - however, I need to be able to allow certain traffic between the VLANs.Alternatively, to get things started - I'm assuming I need to set up ACLs to allow access between VLANs - how would I configure the switch to allow all traffic from one VLAN to the other?
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Feb 27, 2012
I can configure two APs as a bridge with one as an AP with RMW enabled, and the other in WGB mode. I have three VLAN, each configured on both APs with their own SSID. Each switch (cisco switches) port is in trucking with only the three vlan allowed. The APs are associating with each other but not passing VLAN traffic.
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Oct 31, 2012
I have bridged several w/l Tranzeo's together. I have given each of them an IP address on the same subnet as my gateway and manage the units using that addressOther than for management is the IP address of a bridge used for anything else? I have noticed that I can plug in any gateway address I like and the units are perfectly happy even if the phoney gateway does not exist.
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Feb 2, 2012
Is it possible to create a wireless site to site link using 1260 access points as bridges (like the 1300 series)?
Also if so, can you use 11n channel bonding on the bridge link?
I need to link 2 buildings together wirelessly approximately 70 metres apart. There is direct line of sight between them.
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Feb 20, 2008
I have two Cisco 1300's acting as bridges only. I have created an infrastructure ssid on VLAN 2 and assigned this to the radio. I am carrying multiple VLANs between the bridges (using subinterfaces on the fastethernet and radio ports).I have enabled WPA-PSK, but how do I check that this is being used between the bridges? Also - I have a switch connected at each end of the bridge. When I make VTP changes, the remote switch does not pick these up - is this because VTP goes over VLAN1 regardless of the Native VLAN (2 in my case)? Do I have to carry VLAN1 over the bridge to get VTP working, or is there an alternative solution?
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Jan 13, 2013
Two facilites are connected via wireless bridge(AIR-BR1410A-E-K9).we wanted to add wireless bridge at each facility to increase the bandwidth.So we will have two wireless bridge at each facility connected wirelessly. and we wanted to achieve it by doing some kind of etherchannel in the switches at each location.
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Nov 28, 2010
I have two 1310 bridges...one set as root and the other as non-root.For some reason they keep losing connection. When I reboot the non-root bridge, link is established.Both bridges have an antenna connected with the right connector and they have the setting antenna transmit right antenna receive right
logs from root bridge
Nov 29 13:52:53.311: %DOT11-4-MAXRETRIES: Packet to client XXXX.XXXX.XXXX reached max retries, removing the clientNov 29 13:52:53.311: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station XXXX.XXXX.XXXX Reason: Previous authentication no longer validNov 29 13:52:53.568: %DOT11-6-ASSOC: Interface Dot11Radio0, Station Test XXX.XXXX.XXXX Reassociated KEY_MGMT[WPAv2 PSK]Nov 29 13:55:16.260: %DOT11-4-MAXRETRIES: Packet to client XXXX.XXXX.XXXX reached max retries, removing the clientNov 29 13:55:16.260: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station XXXX.XXXX.XXXX Reason: Previous authentication no longer validNov 29 13:55:16.550: %DOT11-4-MAXRETRIES: Packet to client XXXX.XXXX.XXXX reached max retries, removing the clientNov 29 13:55:16.550: Client XXXX.XXXX.XXXX failed: reached maximum retries
logs from non-root Nov 29 2010 13:52:55: %DOT11-4-UPLINK_DOWN: Interface Dot11Radio0, parent lost: Received deauthenticate (2) not validNov 29 2010 13:52:55: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to down The signal strength is around -84dBm Cisco IOS Software on both bridges is: C1310 Software (C1310-K9W7-M), Version 12.4(10b)JA1, RELEASE SOFTWARE (fc2)
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Dec 3, 2012
Two facilities are connected via wireless bridge(AIR-BR1410A-E-K9).we wanted to add wireless bridge at each facility to increase the bandwidth.So we will have two wireless bridge at each facility connected wirelessly.and we wanted to achieve it by doing some kind of etherchannel in the switches at each location..
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Jun 22, 2011
I have a point to point link of 9.27 km using 1410 bridges and AIR-ANT58G28SDA-N antennas as per the documentation that would be an easy to deploy link and it should work at 54 Mbps, eventhough it drops the link, it's so slow and the power measurments indicate -70 dbm (aprox) right under the antenna which is at 9 m height.
This is not the first time I have troubles with 1410 bridges, the other two times I had to change them for 1310 bridges. I wonder if it has to do with some configuration tunning like, external antena gain, link distance or anything else? By the wat this is ocurring in México don't know if that might be worth of taking into consideration in order to deploy a 1410 link.
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Jul 20, 2011
I have an old metal-walled mobile home that I plan on converting to a combination shop and man-cave; it's about 200 feet from my home's computer room, where I have a Netgear WNDR3400 wireless-n router. The only place in the trailer where I can "see" my home network is the kitchen window, and I thought about putting a Wi-Fi repeater there to extend the home network into the trailer. But I have read that using a repeater will cut the network's Wi-Fi throughput in half -- which would not please my wife and daughters back at the house. Is there a simple, relatively inexpensive way to extend the network to the trailer without slowing everything down? Eventually I may have Charter install a separate cable hookup there, which would allow a separate high-speed Internet connection too. For now, I just want to "share" Wi-Fi to the trailer.
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Jul 10, 2012
I have 2 campuses. I have my 5508 wireless controller working beautifully on my main campus using LDAP. (YAY!!) Now for my problem. My remote campus has 1310 bridges. I was able to successfully upgrade one of them to work with the controller, however, I can't get the other two bridges to talk to the one that I upgraded and I can't get them to upgrade, it indicates that they need to be the root. I have several small buildings on that remote campus, than need that remote bridging in order to be able to have network access.
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Apr 6, 2008
Is it possible to configure two 1300 series bridges at one location, each handling a bridge link to another location to BOTH backup and load balance for each other should one of them fail?
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May 24, 2012
I have got two 878 integrated services routers and I need to configure them as transparent bridges in order to connect 2 remote sites over ATM.
As I'm testing the topology, I configured two switches (representing the sites) at each end with a VTP domain. VTP works while the switches are connected directly with eachother, but it won't work with the bridges in the middle. [code]
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