Cisco Switches :: SGE 2000 / 2010 - Random Port Drops
Jan 6, 2013
Lately I've noticed some strange behavior on some of the switch ports. When I go through the logs my SGE2000/2010 stack, I see that some of the ports randomly lose their connection:
2147482703 05-Jan-2013 04:11:43 Warning %LINK-W-Down: 2/g14 2147482704 05-Jan-2013 03:35:20 Warning %STP-W-PORTSTATUS: 2/g33: STP status Forwarding 2147482705 05-Jan-2013 03:34:50 Informational %LINK-I-Up: 2/g33 2147482706 05-Jan-2013 03:34:47 Warning %LINK-W-Down: 2/g33 2147482707 05-Jan-2013 03:34:19 Informational %LINK-I-Up: 2/g33 2147482708 05-Jan-2013 03:34:17 Warning %LINK-W-Down: 2/g33 2147482709 05-Jan-2013 03:34:15 Informational %LINK-I-Up: 2/g33 2147482710 05-Jan-2013 03:34:14 Warning
[code]....
I'm having trouble locating the source of the problem. The devices connected to the port are servers and desktops. This happens frequently throughout the day, but not always on the same ports. What could cause the random drops?
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Nov 7, 2012
I'm setting up a Network Monitoring System in Nagios and Nagvis. Now, I want to monitor the cpu and memory of the switches SGE2000 and SGE2010 with SNMP. Does the OID for the switches SGE2000 and SGE2010 (CPU and Memory).I can't not seem to find them on the Internet(searched for hours).
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Sep 16, 2012
I have a sge 2000 24 port POE switch that won't boot, won't communicate on console or TCP/IP, and all of the port lights are lit up green. Holding down the reset button doesn't fix the issue and there aren't any lights illuminated on the left hand side of the switch.
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Dec 13, 2011
We had a SGE-2010, just purchased 2 (two) SGE-2010P. I want to stack the switches (all 3) (unless there is a better way). Not sure what is needed hardware wise, and how to physically wire the switches. Had switches years ago (diff brand) that used a special cable that connected the switches. It seems that is not the case here. I have not used fiber in networking before so I am new to that part, I’m willing to learn, just need pointed in the right direction.Can all three switches be stacked, (1) SGE-2010 & (2) SGE-2010P? I THINK I need to use the GBIC port 4 to stack, I understand 1 port is enough if two switches are used, but what about three or more switches.What are the other GBIC ports used for? Will I be better off (can I ) use the GBIC ports LAG (2 ports) to the other switches? Or would regular ports work just as well?
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Sep 2, 2011
The router works fine until I plug the 4th wire in the back, which goes to a 2nd desktop computer, then it is only a matter of time until the router drops all internet connections including the direct wire to desktop #1, wireless, and the other two wires.This is my 2nd e2000 router since Amazon replaced the first one after about 4 months as it was having the same problem.
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Aug 7, 2012
We have acquired a cisco sge 2010 to replace our distribution switch. I set up the 802.1X network. Everything works great except I can not find how to enable 802.1x with 'Wake on LAN' on this kind of switch.
On catalyst I saw that it was sufficient to activate this control "authentication control-direction {both | in}" Except that it seems not to exist on this switch. Is there another way to enable 802.1x on WoL without using this command?
Or how to allow the magic packet (WoL) on a tagged port by unauthorized 802.1x?
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May 9, 2012
We recently moved and upgraded our internet service from 1.5 Mbps to 4Mbps with CenturyLink. However, since our service was activated last Thursday, the internet connection intermittently drops and will not recover unless I reboot the modem. The period of up-time will last anywhere between fifteen seconds to several hours, usually falling along the five-to-ten minute range. No difference when using ethernet/wifi. The DSL light stays on, and the Internet light remains on as well.
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Apr 12, 2011
I should start by saying I am no novice when it comes to networks but this router has been nothing but a issue since day one.
*The Setup - 2 wired PCS, 2 Wired Macs, 1 Wireless Iphone, 1 Wireless Ipad.
WPA2 Only / AES key, Channel 6, G/N only, Hidden SSID.
*The Problem - 95% of the time the wireless and wired is running fine. However, Sometimes randomly webpages on the computer will stop loading... but heres the kicker... other internet connected programs like Ventrilo, or torrents, or games will still be working and running from the net like there is no problem. When this happens the internet browsers on the macs and PCs will say page cannot be displayed instantly. Happens to all computers at the same time. After about 10min the webpages will load again. I have 16mbs internet and while this is happening my games and voice chat programs do not go up in ping at all.
I have turned off QoS since that made the most sence... but other then that I have no been able to figure it out. I even turned off wireless while it was happening and it still didnt fix it. A sure fire way to fix it is to restart the router.
I am 100% stumped. Do I just have a bad out of the box router? it is only 2 weeks old.
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Dec 27, 2011
if the sge2010 switch support Routing Information Protocol (RIP) and if so how do I enable it. I have a small wireless router that support it and would like client connected on it te bo visible from the wan side and that worked when I had another device doing the routing with RIP support the wireless router was picking up that information and the routing for the wireless client was working.
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Jun 26, 2012
I am trying to port forwarding Exchange 2010 OWA using ASA5505, wherever I used object NAT or Twice NAT it just doesn't work.... here is my config:
access-list outside-access remark "Exchange Server Access Rules"
access-list outside-access extended permit tcp any host <public x.x.x.11> eq smtp
access-list outside-access extended permit tcp any host <public x.x.x.11> eq https
[code]...
note that i use public ip <public x.x.x.9> on the outside interface for PAT, so all hosts in the same private can access internet
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Mar 15, 2013
I'm trying to troubleshoot a random packet drop issue for an IPSec tunnel between two VTIs. For over a month, we didn't see any issue, and starting today, we have up to 30% packet loss across an IPSec tunnel.
After some analysis, I concluded that the packet loss happens somewhere on the path from the uc520 to the 2921. Packet counts show up correctly on the uc520 physical egress interface, but the packet count is low on the ingress interface on the 2921.
Pings outside the tunnel along the same path are fine.
I also cleared the tunnels on both ends and after they reestablished, the issue was still present.
Any pointers on finding where the packets get lost?
rr-hq-2921#ping 10.1.13.1 source g0/1 rep 100
Type escape sequence to abort.
Sending 100, 100-byte ICMP Echos to 10.1.13.1, timeout is 2 seconds:
[Code].....
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Nov 7, 2011
We have a bunch of computers(70 aprox) connected to a domain. Since couple weeks ago very strange issues started occuring, internet and network access(path to network share is lost) would come up at random times and on different machines and would last for about 10-20 seconds it would re-connect again.All the computers are using private addresses.Most machines are windows 7, some are xp.Using Windows server 2003 as dc.Since the occurance is so random it's very hard to pin point the cause.
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Jun 14, 2011
I'm having some rather odd issues with my wireless connectivity. Running a draytek 2830n router. The wireless connection drops out at random sometimes, at other times it connects (shows full reception) but does allow any kind of internet connection. Plugging in by lan cable allows normal function.I have no clue whats going on but I did just notice that shutting down one of the laptops connected to the network (Dell lx502) appears to have solved the problem for the moment. I've not had a chance to test this as a long term solution. However I believe this is the only laptop with a dual band wifi card.This problem was also occurring on our previous router, a draytek 2820vn but the symptoms were a bit different and this laptop was not there at the time.Is it possible for one machine to knock out an entire wireless network? The other change I made yesterday was to activate the bind ip to mac function on the router for our new NAS as I was messing around with ftp configurations.
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Mar 5, 2011
I have a Motorola surfboard sb5101. Provider is comcast.I have never had any problem with my equipment until now. Here is whats going on. I bought a used sb5101 a week ago so that I would not have to pay the rental fee anymore. Comcast activated it, and it worked fine for a week or two. The other night I got disconnected from XBOX live randomly in the middle of a game. Thought maybe just a hickup, no biggie. Well it happened 3 more times in a few hours, then again the next day.So thinking maybe this used modem is bad, I plugged back in the rental from comcast which I still had. Worked fine for a while, then the same thing, random dissconnects after 10 min, 30 min, 2 hrs into a game...etcOn both modems, the 1st and 4th green light are solid, the 2nd and 3rd green light are flashing when the connection from LIVE drops.So I'm starting to think know that neither of the modems are bad. I then try going directly to the modem instead of the router, never had any problems with the router but figured I try.I even went into the attic and got rid of the 4 way splitter that feeds cable into all the bedrooms and put in a 2 way instead hooking up only the cable line im using for xbox. Thought maybe the signal is getting degraded to bad, eventhough never had a problem before.So now I'm practically hooked up right to the line coming off the street, ethernet cord plugged directly into the modem, no router. Still dropping connections randomly with same 2nd and 3rd light flashing.The connection needs to be completely stable for multiple hours.Also, I called comcast when I had to reactivate the rental modem, so they did refreshed that modem and reactivate it, but still had the disconnects the next day.
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Jun 29, 2012
Router is connected to my ISP with the option Keep alive and redial value of 20 seconds (the lowest i can set). There are two distinct problems: Router drops connections at random intervals. It can happen once a day or several times a day. It always happens overnight (so every morning it isn't connected). This doesn't seem to be related to ISP as direct connection to computer is stable.The Keep alive option isn't working. When it drops connection it isn't trying to re-eastablish it for at least 2 minutes (the longest i have waited so far, 6 times the redial value configured). Producing external traffic (e.g. constant pinging of some host by IP address, refreshing some web page) doesn't work. When i log on to admin console (browser based) simply clicking connect button brings connection back online. I've even been looking at status page constantly refreshing to see if it ever made a single attempt and it appears it didn't.I did my "homework" before posting (upgraded FW to 2.0.02 build 3, finetuned MTU).
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Sep 25, 2011
we have a new SGE-2000 switch. At the moment, we are not able to start the configuration, because the default IP is not wirking. We have reset the switch, but it still doesn`t work. We can`t also see the switch in the IP list in our network.
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Aug 17, 2012
High CPU Utilization on Cisco SGE-2000
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Oct 15, 2009
I have defined several V LAN's and the corresponding IP Addresses on the SGE2000. The static routing works fine. On one V LAN there is a Windows 2003 DHCP Server which I have defined as DHCP Relay Server (Option 82), but no packets are relayed. Has anyone a functional setup, with dhcp relay?
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Nov 27, 2012
what are all the CLI commands supported by Cisco SFE 2000 switch?
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Apr 30, 2012
I am trying to remove my BT Homehub2 and replace it with a router connected to the ADSL line using RJ11 to RJ45 cable in f0/0 configured ip address 86.177.164.200.F0/1 is configured to 192.168.1.254 (current BT Homehub IP) this is connected to my 48port cisco switch in port GI1/0/48.VLAN1 set to DHCP and my host is connected to GI1/0/2 and also configured to DHCP.Ignoring the WAP for now, what am I doing wrong? I know it will be a small IP issue somewhere, do I need to configure GI1/0/48 and GI1/0/2 with IP address'? Am I using the wrong ISP address on my routers F0/0 port?
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Apr 23, 2013
nyone know if "vpc-orphan-port suspend" works if i put on N2k interface. not the fex link. example i have fex 101 and i put on eth 101/1/10 will it suspend the port on N2K connected to secondary N5K when peer link is down?
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Oct 19, 2010
I have several SGE2000 in production and every night I save the current configuration to a tftf server... from time to time I get the following error: [code] Can't open TFTP client.At this time, the only way to be able to save the config again is rebooting the switch, but this is not a solution I am comfort.
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Apr 15, 2011
I've been having some issues with my network connectivity for a while now, and I haven't been able to figure out what the problem is. I run a wired connection to an Ethernet port in the wall of my university dorm. I have verified that it is not a global network issue or an ISP issue; this problem only happens on my PC.My network connection drops/disconnects randomly throughout the day. When I say disconnect/drop, I mean that all attempts to ping or access the internet fail. A few minutes pass before the Network and Sharing center task tray icon shows a warning sign saying that my computer could not connect to the internet.This is temporarily fixed by doing an ipconfig /release and ipconfig /renew, but I have to execute these two commands about 2-3 times a day on average.
There is no exact interval between the disconnects, nor does it happen when I am running particular programs. The disconnect happens regardless of what I am doing at the moment (gaming, browsing the internet, leaving the computer idle).A month back, I installed some Windows Updates and suddenly my internet connection was almost completely broken. I was experiencing the same issue, but much more frequently. My internet would die within 10 seconds of executing any download, but Windows wouldn't recognize that something was wrong. At first I thought the ZoneAlarm, Avast!, or the SafeConnect (as required by my university) services were causing trouble but uninstalling/disabling these services did not fix the problem.I also tried reverting to my default ethernet drivers, which did nothing. I uninstalled and reinstalled multiple versions of my drivers to no avail.However, the internet worked just fine in Safe Mode with Networking, so I cross-referenced the processes/services running in Safe Mode w/ Networking against my normal startup, guessing something else was at play.After some poking around, I discovered that disabling the Server and Browser services permanently fixed the issue of instant connection death. But the initial problem I described still remains;random, less frequent internet connection drops.
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Jul 21, 2011
I have SG200 50/50 Port Switch and the devices that connect into it are servers and workstations
Few days and until we experience network dropouts and when take a look at the switch log it gives me this?
2147483423 2011-Jul-22 16:34:53 Informational %LINK-I-Up: gi3, aggregated (1)
2147483424 2011-Jul-22 16:34:53 Warning %STP-W-PORTSTATUS: gi3: STP status Forwarding, aggregated (1)
2147483425 2011-Jul-22 16:34:50 Warning %LINK-W-Down: gi3, aggregated (1)
2147483426 2011-Jul-22 16:34:37 Informational %LINK-I-Up: gi3
2147483427 2011-Jul-22 16:34:37 Warning %STP-W-PORTSTATUS: gi3: STP status Forwarding
2147483428 2011-Jul-22 16:34:27 Warning %LINK-W-Down: gi3
Device connected to gi3 is a Web Server
This is also happening on more ports ie 20-printer, 13-Cisco Wireless Access Point, 24 File Server etc., which I don't know what is going on. With my research, it said something about spanning protocol. Is this possible to disabled?
The other cisco switch where desktop are also connected doesn't have this error.
My firmware is 1.1.0.73
Boot Version 1.0.0.1
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May 4, 2012
I have an ASA5505 that I am setting up behind another firewall. The external firewall has all ports forwarded to the ASA which is fine as I can see the traffic getting to the ASA in the log. However when the traffic trys to return to it's destination the ASA assigns a random port number. For example for VPN the source port is 443 but when the ASA trys to go back to the public IP addess it is using port 52857 which is obviously blocked on the external firewall. The Packet Tracer also says the the traffic is blocked by an implicit rule on the ASA which denys all ip traffic however I can't delete this rule and as I test I have created another rule allowing all IP traffic.
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Apr 24, 2012
We have computers that are connected to a switch stack of 3 - 3750 switches. Randomly, we experience pcs that fail to communicate on the network. At first thought I figured the port went into err-disabled state, however the port shows up fine on the switch and moving the pc to another port on the same switch in the stack fails to fix the problem. To add to the confusion, if I immediately connect a different machine into the problematic port the newly connected machine has no issue and operates normally. Connecting back the first machine still results in no connectivity.
The only way to gain back network connectivity is to move the pc to a different switch in the stack. shut/no shut doesn't work.The IOS the stack is running is 12.2 and the switch ports are configured using cisco port macros.
here is how all the ports are configured.
switchport mode access
switchport port-security
switchport port-security aging time 2
switchport port-security violation restrict
switchport port-security aging type inactivity
macro description cisco-desktop
spanning-tree portfast
spanning-tree bpduguard enable
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Aug 3, 2011
I just bought a SG200-18 in order to use LAG between a backup server and multiple computers and servers. Servers are supposed to all use 2 links and computers only 1.
As soon as I activate LAG on port 2 and 3, no matter what is connected on the switch I lose access to the switch interface (luckuly, it's still working on port 17 for a strange reason) and all computers / servers connected are randomly losing the network access. Everyrhing start to be slow but most servers and computers don't lose access to the internet. Browsing a web site will suddenly take ages but... it will work eventualy.
I already used LAG on other switch without a single issue.. The only uplink I have is to the router and I know that I don't have any issue with network cables....
So what am I doing wrong ??? I didn't even try to configure the TEAMING on the servers, just creating LAG on the switch will kill everything Oo.. I'm starting to think that my SG200 is dead out of the box.
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Nov 1, 2011
I have a remote site that is using port 4500 for within the isakmp phase of creating a IPSEC tunnel, but for some reason it is also using random port numbers constantly (in bold): [code] These are all blocked by the firewall when trying to communicate with our central router in the trusted network. The central router does not display the same symptoms, it only uses port 4500.Is there a way of preventing the remote router from using random port numbers and only allowed to use 4500??
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Apr 15, 2012
The problems looks like this: I'm able to browse the web without any problems until at random points of time - might be 2 hours after I turn on my PC or 5 or even half an hour the port 80 gets blocked - actually more like it hangs it self. As whatever I try to open i get "waiting for response" going and going. It's not even returning "page not found" error or anything. To top everything all other ports work fine - i can use https, ping run tracert - no problem there.
I've spend two days looking for some answer on the web but came up empty. I've scanned for malicious software with ad-awar and malwarebyte anit-malware - nothing came up. After restart of the pc everything comes back to normal but its frustrating needing to do that every now and then.
My home network looks like this: I have some broadband modem that is connected to local wifi TP-LINK router (Model No. TL-WR340G/TL-WR340GD). There are four devices using this connection - two pc's (laptops), android phone and android tablet.
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Dec 29, 2012
Network running about 60 computers, most of which are running windows 7 professional. Some are on a domain, some are not.At (seemingly) random times, some computer on the network will lose the ability to browse websites (including the web interfaces of networked devices). I can't identify what circumstances cause this to occur. I only find out about it when someone calls me.From the affected computer:I can ping sites I can ping our Cyberoam UTM (which acts as our DNS, DHCP, and firewall)disabling/enabling connection doesn't fix the problem releasing/renewing ip doesn't fix the problem flushing dns doesnt fix the problem uninstalled antivirus on two test machines, problem still randomly manifests.replaced the Cyberoam with newer model users have claimed that if they wait a long period of time (40+ minutes) the problem sometimes resolves.rebooting the computer resolves the issue until it randomly occurs again changing the computer's mac address also resolves the issue until it randomly occurs again.
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Sep 10, 2012
We have an SG300-28P which, at intervals between 5 and 30 minutes or so, drops power to all of its POE-powered ports and then immediately restores power. The switch logs nothing when this happens other than recording that the ports went down and back up, even with debug logging enabled. Non-POE ports are not affected.
When the problem started there were only four POE-powered devices on the switch and we are far under our power budget. (While testing I added a fifth device, see below.)
Not all combinations of devices cause the drops to occur -- specifically, it looks like having devices on ports near each other causes the drops. When the drops occur, the absent counters of all of the POE devices increment. I noticed this earlier thread here seemed similar: [URL]
but in that case, he got no power at all in the adjacent configurations, instead of having it drop every several minutes.
I'm running
sw06#sh ver
SW version 1.1.2.0 ( date 12-Nov-2011 time 23:34:26 )
Boot version 1.1.0.6 ( date 11-May-2011 time 18:31:00 )
[Code].....
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Dec 12, 2012
My sd2008 switch keeps dropping the connection. If I replace the sd2008 with another switch it works without an issue. this switch has a limited lifetime warrenty. If true, can I return this switch for a replacement? The switch has firmware version 2.1 and the serial number is really hard to make out on the bottom of the unit. My sd2008 switch keeps dropping the connection. If I replace the sd2008 with another switch it works without an issue. Will this switch has a limited lifetime warrenty. If true, can I return this switch for a replacement? The switch has firmware version 2.1 and the serial number is really hard to make out on the bottom of the unit.
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Aug 20, 2012
I have 2 switch groups.
2 SGE2010's with VLAN's defined as 10,20 and 30
Vlan 10 is the management VLAN, and it uplinks to our border router.Vlan 20 is the workstation VLAN, and all workstations point to the switch as their default GW? Vlan 30 is the ip phone VLAN, and all phones use this as their gateway.
I would like to put a LAG between said switches, we have some servers on the ip phone switch that need to be accessed by the workstation clients, and the single 100mb link through the router is probably not going to be enough.As I understand it, because the switches have different networks on them, a simple lag will not work. I did create a lag, and assign ip addresses to each side, however in that mode, it doesn't appear I can block vlan 10 from transiting the LAG, and with out that block I will end up with a logical loop, and spanning-tree will block one of the uplinks, or the LAG itself.
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