Cisco Switching/Routing :: 3845 Gigabit Interface
Oct 26, 2011
We have a number of 3845 routers, some running IOS 12.4(22)T2 and earlier and some running 12.4(24)T4. On the ones with 12.4(22)T2 and earlier, gigabit interface g0/1 shows interface down/line protocol down when there is no cable connected to the interface and the interface is not in shutdown state. On the ones with 12.4(24)T4, gigabit interface g0/1 shows interface up/line protocol down when there is no cable connected to the interface and the interface is not in shutdown state. Interestingly in both cases, the "show controller g0/1" command shows " network link is down (NO CARRIER)" when there is no cable attached. It makes sense to us that the interface status would be down/down when there is no cable attached. It does not makes sense to us that the interace would be up/down. Did Cisco at some point change their philosophy on whether an interface should show down/down or up/down when there is no cable attached, or is this a bug?
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Sep 26, 2012
I have an Ethernet Loopback Plug (4 Pairs) made and trying to test the Gigabit Interface on a 3845 Router with a fail result. The interface will show up/up only if I set the interface to 100M/Full Duplex when I plug-in the Ethernet Loopback Plug (4 Pairs). I don't see this Gigabit Interface @ 3845 router has any option to set it to internal or external loopback.
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Nov 20, 2011
I have a cisco router 3845 with Etherswitch modules and one Vlan configured "172.16.6/24", many switch ports are assigned to this vlan. i would like to translate one IP address 172.16.6.200 to a new one "172.25.42.10" but need to keep the other IPs from "172.16.6/24" without changes. below is the configuration of vlan interface and switch port. [code]
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May 18, 2013
I have a question about speed negotiation process between interfaces. I have 3650X Sw and 2960S-48port. All ports of two are GigabitEthernet, however the link between them is only 100Mb/s, Full duplex. I try to set the speed 1000 Mb/s manually in the interface then the interface never up. Its status is down/down. I must set back to speed auto. I show interface Gigabit0/24 in Sw 3650-X and figure out that there are many output drop (over 600000). I clear counter then after two days the output drop is over 70000. This link is trunk link between two switches, all ports of access SW are Gigabit and connect to PC. First, I thinks the 3650X is throttled somewhere in output direction of trunk link. But there is another trunk link (Gi0/23) to another 2960S-48port and no output drop number in this interface. This Giga 0/23 speed is 1000 Mb/s (auto speed, auto duplex)
Does any outside things impact the speed negotiation process between 2 interfaces? And output drop number may caused by abnormal speed between two Gigabit interface?
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Sep 14, 2012
I am trying to configure a loop back interface like so: [URL], on the following device:
C3550 Software (C3550-IPSERVICESK9-M), Version 12.2(50)SE, RELEASE SOFTWARE (fc1on port gig0/1 which is using a 1000Base-SX adapter. This is for troubleshooting purposes and it does not appear to be a feasible option. Is there another way to accomplish in the IOS?
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Apr 24, 2012
I have a 3845-Mb that has a username and password already on it. This needs to be wiped as its a sold unit. However i cannot break into teh IOS in Hyperterminal using Ctrl-Break either as it boots or after teh IOS image has loaded (after it shows Decompressed image {ok} etc). I have tried several break key combinations such as ctrl+F6+break and they dont work either. On boot the unit does show Password recovery Functionality is disabled. IOS image is 12.4(13r)T.
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Jun 9, 2013
When I try to add an IP address to a port-channel interface on a 3845 ISR I am getting an error that seems to imply that only L2 etherchanneling is possible. Am I missing something?Cisco IOS Software, 3800 Software (C3845-ADVIPSERVICESK9-M), Version 12.4(24)T8,
sfo-c3845-1#sho run int port-channel 1
Building configuration...
Current configuration : 31 bytes
!
interface Port-channel1
end
[code].....
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Mar 28, 2013
We have a Cisco 3845 router configured as a voice gateway with multi SIP trunks. But when it reachs 200 calls traffic, the CPU increase to 60-70% and caused by CCSIP_SPI_CONTROL process.
CPU utilization for five seconds: 46%/30%; one minute: 54%; five minutes: 58%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
377 400729448 171017979 2343 6.31% 10.71% 12.44% 0 CCSIP_SPI_CONTRO
[Code].....
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Jun 25, 2012
Can the encryption module (DES/ 3DES/AES/SSL VPN Encrytion/compression) for Cisco Router 3845 able to support the external connection from other high end router, for example cisco 7200? What is the maximum bandwidth, load and concurrent connection it can support?
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Mar 7, 2013
I found cpu load around 90 - 100% on cisco 3845, so I show tech-spec and show log on router and found process "Virtual Exec" use high load. I'm not sure this situation make high latency time on my network.
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May 1, 2012
I have a Cisco ASA 5505 and I have my internal and external interfaces configured but I currently cannot ping from the inside to an IP Address on the outside. I had this setup and working and I have another set of equirement that I am replacing that is working with my service provider so I know it is a configuration issue. When I ping 4.2.2.2 for example I get:
Destination host unreachable
Do I need to add a static route from my inside interface to my outside interfaces?
: Saved
:
ASA Version 8.2(5)
!
hostname pxasa
[Code].....
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Mar 14, 2012
According to Cisco's site the WS-X6748-GE-TX is a "10/100/1000" module.URL
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Nov 29, 2011
I have a router 3845 with c3845-advsecurityk9-mz.124-24.T6.bin software . Frequently we are facing problem in logging to the device .Inorder to resolve we need to reboot the router . Yesterday fortunately i have got the console access for some time so i came to know that TPLUS process is consuming 99.9% percentage cpu.
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Jun 21, 2010
I have installed NM-1T3/E3 IN A CISCO 3845 WITH IOS c3845-advipservicesk9-mz.124-9.T3.bin AND 512 MB RAM .WHEN I ENABLE THE CARD THE CPU PROC HISTORY SHOWS 100% WHEN DISABLED IT COMES DOWN TO 10%
Slot 0: C3845 Mother board 1GE(TX,SFP),1GE(TX), integrated VPN and 4W Port adapter, 7 ports Port adapter is analyzed
Slot 2: NM-1T3/E3 (clear/subrate) Port adapter, 1 port Port adapter is analyzed
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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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Apr 17, 2012
I realize what the error message says but I was not aware that there is a class-map limit? This is on a ISR 3845 router.Is there a limit on the amount of class maps that can be configured on the router?
Is it the amount of times class maps are used (as I do not think my client has 1023 class maps but they are used several times each)?
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Jan 30, 2012
I have a Cisco 3845 Integrated Service Router and I have installed a Service Module. I want to use the integrated Gigabit ports as switch ports and put ports in the Service Module and Gigabit port in a VLAN.
Is this possible? can it be done by setting internal Gigabit link as trunk and how? Below is the somewhat the setup i am looking for
Service module
fa0/1 |
fa0/2 | Vlan X
fa0/3 |
[Code]....
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Mar 18, 2013
I'm trying to have a standard equipment for our POP deployment. Basically this edge router will connect to our customers and pass data and or voice traffic, capable of BGP and good enough to accomodate up to 4 clients.
We have on hand a 3845 Router, and ME3600X. The 3845 is EOS and replacement is 3945. The ME3600X is a fixed configuration so would you recommend a 3945 or a much higher model like a 7300.
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Nov 7, 2011
I have a 3845 router which got reloaded immediately and need to know the reason for the reload .Router have created crash info detail .
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Apr 18, 2012
I am trying to test the gigabit ports on a Cisco 2950 switch. 1000Base-SX. I have the internet or dhcp server connected to port 24 on the first switch and my pc hooked up to the (any) port on the second switch. Both switchs are connected with a fiberoptic cable with MTRJ connectors on either side.
Now when I use gi0/2 on both switchs all works fine. I get a dhcp address from the router on the other end of the first switch. but when ever I include gi0/1 on either end of the fiber optic cable neither of the ports will initialize (neither of the leds above the ports light up). I have deleted all the config files before booting up the switchs so they should have a default blank configuration.
When looking at the Http web page for the switch I dont see any issues with the port. what can I do to make sure these ports are working or can be configured?
I will not be able to post back any more information about the switch until next tuesday. Im off till then.
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Apr 7, 2013
im currenly configuring a 4500X with 16 port. All sfp are 1Gig, but when I input show ip int brief, it shows that the interfaces are on 10 Gig. Does Catalyst 4500X already support the 1Gig SFP without inputting a command or do I have to configure it to activate the 1Gig interface?
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Jun 4, 2012
Are all ports on Catalyst 4500X Gigabit/10-Gigabit or just the ports on 8-port module. We are looking at 4500X for campus distribution layer but need Gig ports to access switches for now and may year from now will be using 10G.
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Aug 23, 2012
Documentation discusses "1-Gigabit Operation", where all 4 1-Gig SFP's on Sup7L-E are enabled. But it does not say __how__ to select either 10-G or 1-G operational modes.
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Jun 4, 2013
I have a 3550 switch right now, and need to upgrade to a gigabit switch, so I'm looking at a 3560G-48. For some reason I purchased an EMI version of my 3550, but run the ipbase image...what I need to look for - is a 3560G-48-s good for what I need?
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Mar 12, 2012
Brand new 2960. When I plug a cable into the port, nothing happens. The port light doesn't begin negotiation or anything, it just stays dark. The cable works fine--I have it on another switchport with a crossover connector connecting to a little Cisco SOHO switch without problems.
I've done the following:
switchport
switchport mode trunk
switchport trunk allowed vlan 1
no shutdown
In other words, I've fiddled with it. But I don't know why it doesn't light up..
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May 1, 2013
I have two switches, WS-3750-24PS-S connected in two cabs via fiber. Patch panels at both ends with patch leads. Used tester to confirm end to end fiber connectivity. When plugged in, one switch lights up the other does nothing.
Ports are as follows:
interface GigabitEthernet1/0/2
switchport trunk encapsulation dot1q
switchport mode trunk
same at both ends. Tried both GI ports same result. swapped transceivers over and the same result, (one switch lit one not - the same switch in both cases). put both transceiver in each switch, (gi0/1-0/2 in a single switch). on the one that lights up in the original scenario we get link on both ports and they come up, on the other nothing happens. shut down both ports on the malfunctioning switch and no shut them, no change.
Show transceivers doesn't show transceivers on the malfunctioning switch, and no attempt is made to bring the ports up if the fiber is removed and replaced.
it is almost as though the two gb ports are kaput. Anything else I can try?
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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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Sep 13, 2012
I have Cisco 3845 with two Gigabit interfaces configured as port-channel with subinterface and with QoS.However shape does not work, why? [code]
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Dec 10, 2012
I am using a Cisco ME 3800 switch with 24 Gig and 2 Tengigabit interface. But after configuring the Tengig int with ip add and negotiation it is no know visible in the switch. Instead TenGig I am seeing two (Gi0/1 and G0/2). Not even showing the Tengig in the running config.
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Nov 27, 2011
In my cisco 3845 router I can see output packet drop in some of the interfaces.I suspect that router is processing packet beyond its mix throughput limit. Moreover when i run show int fax/y switching command I can see packet drop by RP process.
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Feb 21, 2012
I am looking into bringing MetroE into our data center. I currently have a 3845 router and would like to find out if it can support a 300-500M MetrE link.
Also would you recommend a router or a switch that can handle 300M - 500M MetroE link ? Do you typically terminate MetroE link on a router or a switch ? can I terminate it directly to a routed port on a Nexus 7K ?
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Jan 16, 2008
I have this card installed onmy 3845 running version 12.4(18). But this card fails to show up.
here is what I found in a show tech.
WIC Slot 0:
Unknown WAN daughter card
WIC module not supported/disabled in this slot
Hardware Revision : 2.0
Top Assy. Part Number : 800-27738-02
Part Number : 73-10677-02
Board Revision : B0
Deviation Number : 0
Fab Version : 02
PCB Serial Number : FOC********
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
Product (FRU) Number : HWIC-2FE
Version Identifier : V01
CLEI Code : COUIAFUCAA
Base MAC Address : 001a.6c70.260b
MAC Address block size : 2
Connector Type : 01
EEPROM format version 4
EEPROM contents (hex):(code)
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Jul 10, 2012
I have the possibility of upgrading a DS3 to Metro Ethernet, Gigabit connection. My dilemma is I have two VTP domains in my network. How can I get two VTP domains over one trunk to a remote site ?
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