Cisco WAN :: 3760 - Possible To Go From SM Fiber To MM
Jun 6, 2011
I am new to fiber connections. We are have a SM fiber comming into our data center. It will terminate with Single Mode SC Unicam connectors in the fiber panel. I want to connect these to a 3760 GB switch using Cisco GLC-SX-MM Gbics. I'm guessing all I need is a SC to LC fiber connection. My question is this; is there any issue going from Single mode to Multi-mode? Do I need an adapter or do I need to find SM GBICS? The distance between the patch panel and switch is only about 10 feet.
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Mar 26, 2013
My carrier is dropping off a single mode fiber on LC connection 10gig port but on myrouter I am using XFP-10G-MM-SR modules. Can I still use a SMF to connect from handoff to this router or do I need a different module?
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Feb 22, 2012
I need some fiber to run between a Cisco Nexus and an IBM server with Intel NIC. It's 30meters, and LC-LC connectors.What is the difference between 62.5/125 vs 50/125?
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Feb 11, 2013
I am specking a SRW2008P-K9 switch for a customer. They are using MM 62.5 fiber. I need to know what Gig SFP will work for them. I am also quoting them a WS-C3750X-24P-S.
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Jan 12, 2011
We've recently moved from using FiberChannel across an OC-48 between two data centers to GigabitEthernet. Data replication throughput has dropped from 700Mbps down to 45Mbps. The telco provider has demonstrated 1Gb throughput via UDP andTCP using T-Berts. However, when we connect two computers or servers, we do not get near the throughput performance.
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Jul 31, 2011
I have a question relating to installing lines underground in a conduit.
We've had several lines get hit by lighting which leads to the line being bad, equipment being damaged and so on. We've then installed a new cat6e cable WITH lightning arrestors which were blown almost instantly on the first storm. This is obviously a bad ground issue, and a risk to the equipment.
This being said, I would like very much to run fiber optic cable in this conduit and then convert it to ethernet, but I don't know if fiber is susceptible to lighting like ethernet cable is, OR if there are other methods to prevent this freak of nature crap!
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Sep 22, 2012
I have been doing network and computer work for a small public library which will soon be needing to change internet providers. Our planned route will be to have a fiber connection directly from our local ISP, but we need to figure out the best network hardware to accommodate this network connection.We currently have two HP 1810-24G switches connected to a Sonicwall TZ100 firewall as the primary router. The firewall/router connects to the internet with Cat6 connected to a fiber optic media converter. The media converter is on lease from the current internet provider so it will be gone.Our new ISP has said that they can provide a fiber connection in our building to an SFP port termination, which is their recommendation. Ideally, this would be an SFP port in a router or firewall. However, there seems to be very few options for routers with SFP and they're all incredibly expensive compared to a network switch with SFP. While I imagine we could just terminate the fiber optic connection into a cheaper switch with SFP and connect to that with the firewall, our network is further complicated in that we have a CISCO LifeSize video conferencing system which ideally runs best without running directly through the firewall, which can cause some lag and glitches in the signal it seems. I don't believe it's possible to have the router WAN interface connect through to the ISP with a static IP and PPPoE sign on as well as another network devices using the PPPoE and a separate static IP address, am I correct?Have I just over-complicated this network issue, and everything should just be run behind the existing firewall, or should I be able to find a different firewall/router or switch that can connect with SFP to the ISP?
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Jul 7, 2012
One of our customer would like to connect 3 datacentres and decided to use VPLS to extend layer 2 VLANs . For this purpose they have bought six Cisco ASR1000 edge routers( two at each side).They also wanted to buy MPLS SP backbone but have decided to buy 2x10G dark fibre links instead.My question is,
1-Will it still possible to run VPLS over dark fibre? Because all the documents I read regarding VPLS are deployed over MPLS backbone.
2-Any sample configuration for implementation VPLS in ASR1000 ?
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Aug 14, 2011
We've recently bought a cisco asr 1001 Router and I have a number of interface slots. I want to populate these with fiber modules.
Which fiber modules are compatible? Are the regular SFPs ok to use or is there a special asr series of SFPs to use?
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Jun 5, 2011
Is there any fiber module card for Cisco 3825 I can use in addition to the built in SFP port?
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Jul 20, 2011
My Storage supports RJ45 Connectivity. Some it gives slow performance. What if i connect all the Macpro using fibre optic and use some sort of converter to convert all the fibre connection to LAN. Will it increase performance?
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Sep 3, 2012
I have had fiber optics for phone, TV, and internet (30/30 speed). They upped the price 80%! I would like to keep my internet on fiber optics but drop TV and phone to cable which is cheaper. Can I have both systems simultaneously? Also, we have a Sony L-series TV/Computer. IT's a TV and computer in one. Can we have both fiber optics and cable attach to it at the same time?
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Jun 26, 2012
I have a couple of questions concerning OM3 fiber optics <link snipped>. As i was searching for a vender to provide the cables needed for a job i have ran into OM2 & OM3 fiber patch cords. Besides the color difference, is OM3 the new revolutionary cable type being used now and days? The specs i have seen between the 2 are quite similar, both are 50 microns
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Jul 13, 2011
I am going to design a network of an University.I want solution completely on cisco
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Jul 23, 2012
When it comes to fiber optics my knowledge is very limited. All I know is that they can carry data at high bandwidth for a long range at blazing speeds etc.My boss has asked me to link several buildings to the network and I am led to believe that joining them through fiber optics to be best since we are expecting a lot of data traffic between.I have done the normal RJ-45 networking with Gigabit networking in my organisation but need your assistance on how to join each of the buildings through fibre optics.Draw up the fiber optic lines from the main building to each building.All the buildings have Gigabit Cat6e cabling and network in each.I am planning on using a single mode media converter to convert the end of the fibre optic to the normal RJ45 connector and plug it to each switch at each of the ends of the fiber optic cable .I don't even know the gadgematics required except for the cables them selves, crimping tools, the media converter. There is about 300-400 metres in between of each building from the main building.Also, I believe that we need to create cross over cables as in the normal way we do in connecting 2 switches.
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Jan 3, 2012
Is there an association between fiber type, wavelength and distance? I mean are there single-mode fiber cables, which are more suited for 1550nm wavelength and have poor performance when wavelength is for example 1310nm? Are there fiber cables which support only some narrow wavelength range? In addition, how is such behavior called in physics?
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Feb 12, 2013
An external company is going to deploy multiple fiber links on my campus.Link distances vary from 120 to 400 meters.I already have the switches in production with spare SFP gigabit ports on the locations.The backbone is gigabit, so I asked them to use GLC-LH-SMD SFP modules.So, they just called me and according to them, the minimum distance for MMF links with that SFP module is 550 meters. I checked Cisco's website and it says "up to 550m"?
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May 23, 2012
Someone had told me the 6500 switches can be stacked via fiber. This feature is available for the 3750s?
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Oct 19, 2011
I have successfully set up a VLAN on my primary switch which is an SGE2010. I have 3 other switches is other buildings connected in series. The next in line is another SGE2010 and then a SLM2024 and an SGE2010. Each are connected with Fiber and I'm not sure how to set up the switches so that the router controlling VLAN 2 will push IP addresses to the clients on that VLAN and allow internet access. We're using it as a guest VLAN for our customers to have internet access. I have those GBIC ports set up as trunks right now except for the SLM2024...I'm not quite sure how to set that up. The VLAN is set up on each switch exactly the same though.
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Jan 4, 2013
Trying to replace 3Com Superstack II Switches (3C16980) with 100Base-FX Modules (3C16970) with a Cisco solution. Existing Fiber connector in Network closet on both ends is an SC connector (picture attached). What Modules, adapter cables do I need to connect to an SRW2048 switch at one end an SRW2024 switch at the other? Will this solution provide a Gigabit connection over the Fiber ?
I am looking at using SRW2048-K9-NA with MGBSX1 module at one closet and SRW2024-K9-NA with MGBSX1 module in the other closet at the other end of the Fiber cable.
I found an adapter cable that will convert an SC male to an LC Male and it looks like it will work but I have no experience with fiber. I attached a picture of this adapter as well. It is listed on line as - 1ft Fiber Optic Adapter Cable LC (Male) to SC (Female) Multimode 62.5/125 Duplex
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Dec 15, 2010
As the subject suggests I have an issue with a ME-3400 that crashed when the fibre patch was pulled.
This is the reduced output from #show cpu proc
198 78753 213 369732 46.38% 37.30% 13.32% 0 IGMPSN L2MCM 213 21813 468 46608 11.23% 9.90% 3.69% 0 REP BPA/EPA Proc
Amongst other things this was pulled from #show log
Dec 15 11:01:38 WST: %SYS-2-CHUNKEXPANDFAIL: Could not expand chunk pool for REP Cam Flush . No memory available -Process= "Chunk Manager", ipl= 4, pid= 1-Traceback= D9BAA8 D9C1F4 1738F20 A6E77C A6524CDec 15 11:01:46 WST:
[Code].....
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Jun 24, 2012
I have a Cisco ASA 5520 that I'd like to be able to connect directly to our gigabit fiber connection (we're currently connected through a media converter that's causing problems). I've found the following:Cisco ASA 5500 Series 4 Port Gigabit Ethernet Security Services Module [URL]. I only need a single fiber connection, as opposed to the 4 copper + 4 fiber.
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Jan 8, 2012
I've recently upgraded from a 512k adsl connection to a 16mb fiber optic connection.Whereas I never had a problem previously, my rvs4000 slows to a crawl once or twice per week. The only solution seems to be to cycle the power since the admin interface freezes. I also have to cycle the power on my two wireless ap to get them back up.I believe I have the latest firmware, is this a common problem on a faster connection?
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May 30, 2012
We’ve just begun the transition from our old 3Com switches to new Cisco switches and we’ve encountered interoperability problems as we start the transition.Goal: Extend 6 VLANs (each representing an IP subnet) via fiber from a port on the 3Com 5500G-EI to a port on the Cisco SG-300-52
We assign an IPV4 address to the Cisco SG-300-52. We can successfully ping/web-manage at this address if we do a temporary copper jumper from a 3Com switch to the Cisco. IP address is in the subnet assigned to VLAN7•2) At the 3Com side, the fiber port is set as “hybrid” and is passing VLAN 1 untagged; VLANs 3-8 tagged•3) At the Cisco side, the fiber port is set as “trunk” and is defined with VLAN 1 untagged and VLANs 3-8 tagged.
If I try to change the management interface on the CISCO from VLAN 1 to VLAN 7 (as I would on the 3Com), I lose connectivity over the temporary copper connection•B)
If I remove the temporary copper jumper from the Cisco (keeping the “working” management IP address) and create the fiber link between the 2 switches, I lose connectivity to the management IP , If I set the 3Com fiber port to “access” and make the fiber connection, I can ping the management interface – but of course, I can’t pass the other VLANs to untagged access ports on the Cisco – and it has the fun side benefit of messing with IP management settings on other 3Com switch stacks attached to the 5500G-EI. However, it does demonstrate that we can get network traffic communicating over the fiber link between the 2 switches.
How I can proceed to a) have the management IP address in the IP subnet defined on VLAN 7 while passing the other VLANs to access ports on the Cisco? BTW, I’m a networking neophyte (it’s a very small part of my job and I do it infrequently), so I prefer to use GUI management to CLI options, although I can perform CLI configuration if presented with the right commands.
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Oct 2, 2010
I would like to know which patch cord should I be using between X2-10GB-SR and SFP-10G-SR.
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Mar 2, 2012
We have a stack of 2960S, and have a new client that wants to connect via diverse fibre to both switches(From 2 switches on there side). We currently run MST and client is (currently) running PVRST. The 2 links will be trunks (With the same ~5 vlans running over both)
Our "standard" trunk config is:
switchport trunk allowed vlan 228,229,265-268
switchport mode trunk
mls qos trust dscp
storm-control broadcast level 20.00
storm-control action trap
no cdp enable
spanning-tree bpdufilter enable
spanning-tree guard root
So after recommendations on what is needed to avoid L2 loop, and to ensure we force one trunk port to be the "primary" for those vlans, and the the other trunk port to be "backup"?
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May 14, 2012
The core switch is a 6506 and one of the modules is the 48port POE module. The 6506 resides in the main building and we need to interconnect two other annexes to the main building via fibre. is it possible to have just 2 sfp ports on the 48 port module or how to connect the fibre cable to the switch?
Also, if the existent network is made up of Cat5e cables would it be of anyuse to use Cat6 cables for uplink for the switches on each segment to the core switch. I feel basically the Cat5e would nullify the speed of the Cat6 or am i wrong and this would make uplink speed faster.
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Jul 10, 2012
Can I use the SFP-10G-SR 10g interface woth Multi - Mode fiber?
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Dec 24, 2011
We have Three locations (A,B,C) across campus. Location A is Main Location, While B & C are remote locations. Distance among all locations approx. 2 miles.
I want 10G Fiber among these three locations. I am taking 4510+E with SUP 7E with Redundant SUP & 10G Fiber line card(X2 10G) at Location A.At Location B & C, i need Max. 2 Nos. of 10G uplink. i am taking 4507r+E with redundant SUP 7LE. Can i terminate 10G Fiber UPLINK from Location A in to Redundant SUP 7L-E(10G SFP+) at location B & C ??
At one time, Primary SUP 10G uplink should be active & Redundant SUP 10G uplink should be standby. When primary SUP fail, redundant SUP 10G uplink will be active. Is that Possible with this scenario?Is that possible that at same time, 10G Uplink on both SUP 7L-E be Active?
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Jun 8, 2013
I am having a bit of trouble with the following scenario; I have two 2901 ISRs and a 2924XL setup in the following fashion.
2924XL--->P2P-Fiber--->2901ISR--->P2P-Fiber--->2901ISR
I need to be able to reach the LAN 192.168.1.0 from 192.168.3.0 for TS but cannot get this to work. I can ping from within the switch all around and i can ping from within the woodlawn router all around but cannot ping host to host.
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Dec 29, 2012
choose the right media converter for my private LAN? My budget is very less & I found TP-Link products fits in my budget.I got confused by looking at 2 models & don't know which one to choose. TP-Link's MC220L and MC210CS. these two models are same but with different I/O Ports(connectors) for Fiber Cable connection?
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Jun 7, 2012
I've got tons of fibre in my network. However, tbh, my knowledge about correct light levels isn't great. I generally wait until my router complains about a light level before I do anything. I would like to set up SNMP monitoring for light levels, but I need some kind of baseline.Anyone with extensive fibre experience? What light levels should I be looking at for both multimode and singlemode fibre?
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Apr 26, 2012
We're planning to install 24 strand singlemode fiber optic cable in three ocations. What is the best way to run the cables between the 3 locations. Location 1 is in the south, 2 is in the middle and 3 is in the north pretty much in a straight line.Should we run one fiber optic cable from location 1 to location 2 and another fiber optic cable from location 1 to location 3 or is there a better way? Maybe we can run from 1 to 2, 2 to 3 so that location 2 acts like a hub.Is there a way to just run one fiber optic cable from location 1 to 3 and along the way somehow splice that cable to go to location 2
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