Fiber to ethernet

What is the best way to take advantage of a new fiber ring backbone installed within company. I want to add two divisions to our network now and would like to plan for the future, not just bring them in and use regular 10mb ethernet since we have the new fiber backbone. The fiber hasn't been fully installed, Presently we had a T1 line and two of our divisions accessed the network through the T1's. A media converter was used from the patch panel to the switches. Switches are used throughout the divisions (all within a 3 mile radius of the central point). I need to bring in a new division now and want to take advantage of the new fiber. What is the best switch to use to get the best performance. The divisions that are being brought in will not have more than 8 users.

It depends. How many strands of fiber are available between each location? Many strands may mean you can set up point-to-point links in a hub/spoke or star topology. If only two to four strands or so in a true ring topology, and you may be better off considering SONET or CWDM; but that equipment can get pricey very quickly, and is hard to cost-justify for 8-user locations.
I assume of course that it's all single mode fiber.
Cost-wise, the least expensive way to get those eight users at each location onto the fiber with only Cisco equipment would be...let's say L2 or L3 switches like the 2950G or 3550, with LX/LH GBICs. Or maybe 3750 switches and LX/LH SFPs.
Or, use media converters to connect the 10/100 switches in each location via 100-meg Fast Ethernet. But then you're talking third-party manufacturers, like Transition Networks (www.transition.com).

Similar Messages

Uplinks - Fiber to Ethernet converters

Hi,
I am planning to use Fiber to Ethernet converters for all 25 uplinks and will connect to WS-C3750X-48PF-S.
I had WS-C3750X-24S-E in mind but needed copper connections as well to connect the routers and a few other systems.
Is it a good idea to use these converters for all the uplinks or should I consider WS-C4506-E?

You may want to look at the 4500-X too. They work great as a distribution switch. Personally I would stay away from media convertors. It's just one more thing to fail and the majority of them have little visibility when something does go wrong. However if you do decide to go with them I would look at Transition Networks.

Fiber to Ethernet converter setup.

I am testing a fiber connection over media converter.
The cenario is as follows.
Setup sfp interface IP on cisco router. Connect Fiber to Media Converter fiber interface and connect Ethernet interface to Firewall Ethernet Int and setup ip.
Cisco router gig0/0 SFP ========== Fiber to Ethernet Converter --------------- Firewall
Is this possible? if so how would i get this to work?
Thanks for the help.

Thanks for the reply.
I think that you might be right. I guess i need a converter as a stand-alone application.
All a really want to do is configure Cisco Router with an GLC-T SFP and connected over fiber to a location and from that location use a converter to convert fiber to ethernet and configure their firewall. I beleive the converter...like you said it will have to be a stand-alone device. Also it would have to have auto-negotiation capabilities.
Any suggestions on a type of fiber to ethernet stand-alone converter?
Thanks

SG 300-10 . Mapping fiber to ethernet ports (vlans?)...

Hi,
the incoming fiber on ports 9 and 10 are on different subnets. I need to map the subnet on port 9 to ethernet ports 1-9 and port 10 is on its own. I have the device IPv4 address set to a static address on the same subnet as port 9. I don't know if there's an easier approach, but I attempted to map the ports using vlans (please see the attached screenshots). We don't yet have the fiber link established for port 10, so I haven't had a chance to test, but I wanted to confirm that my configuration is sound. I used the default vlan for ports 1-9, because I need to manage through that subnet. I added vlan 10 for port 10, but I don't know if I have it configured correctly... Please advise. Thanks..!

Hi Greg,
Fiber ethernet is most likely running at 1000Mbits/sec and any Copper Ethernet interfaces on the switch runs at 1000Mbit/sec. personally the only differentiation I make between the copper or fiber are the distances they can run.
I love your screen captures it shows me that ports 1-9 are untagged in VLAN 1 (default VLAN) and port 10 is untagged in VLAN 10.
It tells me that both fiber runs are running untagged Ethernet frames on both fiber runs.
You have associated a IP address onto VLAN1 so you can manage the switch.
but the next question is;
What are you trying to achieve ?
regards Dave

Newbe to fiber / Hardware suggestion

i am an administrator for a small fiber optical LAN network, it consist of 90 computer, some with 1Gb fiber and some 100 MB Fiber. Currently we have 6 AT8016 switches ( 16 ports 100 MB Fiber) and we want to replace this with 4 24 ports Fiber GB Switches,
Doze anyone have some recommendations of Cisco switches I can use,

Hi Svein,
Let me try to understand your requirement.
You need a switch with 24 ports of Fibre Optic with 10 Gb interface (fibre)?
If this is so, you can you a number of choices:
1. WS-C3560E-12SD has, as with previous post, 2 X2 10 Gb ports and 12 x 1Gb SFP ports.
2. 4928-10GE offers 28 ports of wire-speed fiber Gigabit Ethernet ports (SFP) and two wire-speed 10 Gigabit Ethernet (X2 optics).
3. WS-3560E-12D has 12 X2 10Gb ports. Using an X2 TwinGig Adapter converting 10 Gigabit Ethernet X2 Interface into Two Gigabit Ethernet SFP Interfaces.
Cisco Catalyst 4928 10 Gigabit Ethernet Switch
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6021/ps9903/data_sheet_c78_494757.html
Cisco Catalyst 3560-E Series Switches
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps7078/product_data_sheet0900aecd805bac22.html
The next one up is to get a 4500 or 6500 chassis (including the Sup cards) and get the SFP/GBIC cards. Don't know if you want to go down this path because it's not financially sound.
Hope this helps.

Conversion from OC-192 to Ethernet

Hello ,
We have backbone links which are WAN-PHY based that is based on SDH/Sonet directly terminated onto the routers with STM-16/STM-64 cards .These links needs to be converted to Ethernet for monitoring purpose to a monitoring device or IPS which supports only Ethernet interface
Does anyone know of any media convertors from fiber to ethernet that is 10GBASE-W to 10GBASE-SR or 10GBASE-CX4

Yeah they will take your coax from your cable modem and use it on the fios router.

Configure ce interface to accept all frames (regardless of 802.1q tag)?

On Solaris 9,
is it possible to configure a ce interface so it accepts
all Ethernet frames it receives, regardless of the presence,
absence, or value of an 802.1q tag?
I'm trying to run packet sniffing software on a ce interface
(I'm not using the interface for IP). The Ethernet switch
I'm attached to forwards to me copies of traffic from many
different VLANs, via a port mirroring function. Most of
this traffic is tagged with various 802.1q VLAN tags.
Some of this traffic may be untagged.
My difficulty is that since the Sun Gigaswift 'ce' interface
supports 802.1q, if I configure the interface so it
doesn't "do" VLANs (e.g. 'ifconfig ce5 plumb'), the ce interface
discards any incoming frames that have 802.1q tags.
Alternatively, if I configure the ce interface so it "does"
VLANs (e.g. 'ifconfig ce10005 plumb'), I end up having to
configure dozens of logical ce interfaces (one per VLAN) each
of which will only receive frames tagged for one particular VLAN;
I don't end up with an interface that receives all VLAN frames.
I want one logical interface that receives all the frames,
so I can point my sniffing software at it.
There's no problem doing this with a card that doesn't support
802.1q, since that card will happily accept all frames and pass
them up. So I can do this on qfe or bge interfaces. But I need
to do this using interfaces available on a PCI card
(my V880 has several port mirrors coming from various Ethernet switches),
the interfaces need to be 1000 Mbps (which rules out the qfe card), and
I'd like to stay with copper (which rules out the bge card).
That's why I'm trying to do it with the quad ce card, but I'm
stymied by it support for 802.1q. (If there were just some way
I could turn off 802.1q support for specific ce instances.)
Is there a way I can accomplish this with the
copper Gigaswift interface (Cassini driver) in Solaris 9?
If not, is there another 1000 Mbps copper interface (provided on PCI card)
that can do this?
Or does this become possible in Solaris 10?

Oops, when I wrote "bge" above, I meant "ge", of course.
(ge is fiber gigagbit ethernet interface and doesn't know about 802.1q.)

Is there a GBIC to sfc patch cable?

I believe the currently installed fiber is GBIC, but the switch converter is mini-GBIC. Is there a way to get these to work together?
Thanks.

I'm not really sure what you mean, GBIC is a type of interface convertor and usually has SC Fibre connectors, the mini-GBIC you are referring to may be an SFP which is a smaller type of interface convertor and usually has LC Fibre connectors.
GBICs and SFPs will work together as long as they are the same type ie Single Mode or Multi Mode and you also need to make sure the TX and RX Optical Power levels are within the specified limits at both ends of the link.
On some switches the command "show inventory" may show the type of interface convertor installed.
SITE-A-CAT#show inventory
NAME: "SITE-A-CAT", DESCR: "Cisco Catalyst c2950 switch with 24 10/100 BaseTX ports and 2 GBIC (Gigabit Interface Converter) slots"
PID: WS-C2950G-24-EI   , VID: L0 , SN: FCZ1041Y0KJ
NAME: "GigabitEthernet0/1", DESCR: "longwave fiber gigabit ethernet port adapter"
PID: GBIC_LX           , VID: 30 30 30 30, SN: AGS094801V1
Or try the command "show interfaces gi/x/x/x capabilities" (where gix/x/x) is the interface number.
PE-CAT-A#show interfaces gi1/1/1 capabilities
GigabitEthernet1/1/1
Model:                 ME-C3750-24TE
Type:                  1000BaseLX SFP
Speed:                 1000
Duplex:                full
Trunk encap. type:     802.1Q
Trunk mode:            on,off,desirable,nonegotiate
Channel:               yes
Broadcast suppression: percentage(0-100)
Flowcontrol:           rx-(off,on,desired),tx-(none)
Fast Start:            yes
QoS scheduling:        rx-(not configurable on per port basis),tx-(4q2t)
CoS rewrite:           yes
ToS rewrite:           yes
UDLD:                  yes
Inline power:          no
SPAN:                  source/destination
PortSecure:            yes
Dot1x:                 yes
Hope this helps

E4200 limitations in Bridge Mode

Hi,
My setup goes like this: I have a Fiber to Ethernet connector from my ISP. The Ethernet cable goes to an iSP issued Zyxel router. Into this router the landline phoneservice connects to give us VoIP landline service (which is cheaper). An Ethernet cable goes from the Internet port on the E4200 to a LAN port on the Zyxel router. That works great but I had to put the E4200 into Bridge Mode to get it to connect to the Internet via the Zyxel router which I need to use the phone services my ISP provides.
I bought the E4200 because I wanted to use the dualband functionally and get a 802.11N 5GHz network setup and to give me the ability to block certian websites and services which I knew Cisco/Linksys is famous for - the abillity to control your network.
Well then imagine my surprise when I could not use the Parental Control settings when the router is in Bridge Mode... This was the reason I bought this router over an Apple Airport Exreme. Is there anyway to get it to let me use the Parental Control anyway while in Bridge Mode or a better way for me to connect the router with the rest of my network?
Thanks for any help!
Solved!
Go to Solution.

If you don't have any devices (primarily gaming devices) which require an open NAT, then you can connect an ethernet cable from the Zyxel router to your E4200's Internet port and just use it like a normal router without bridge mode.
Just make sure the E4200's ip address is on a different subnet (Just change the third octet (number in the third decimal place) to something other than the one used as the Zyxel's default IP.
You could call your ISP and ask them how to dumb down the Zyxel so that you can use the E4200 as the primary router and the Zyxel as a modem too.
I don't work for Cisco. I'm just here to help.

Ping u.u.u ??

Hey,
I recently got fios at a branch to facilitate a backup circuit (dmvpn over bgp)
I am plugging my cisco 2911 directly into the Ethernet port of the ONT, which looks like a modem that converts fiber to ethernet
When I do that, when I try to ping the interface on my router that is plugged into the ONT, and I get a response 'U.U.U'
Not sure what to make of this
I can ping my gateway so that's promising
If I pull the cable out of the interface, I can ping the interface but not my gateway.
I can't failover test for a couple days but just curious does anyone know what U.U.U means? I'm ssh'd into the router that I'm pinging the interface of so it should just work.
Thanks!

Agree that the U indicates Unreachable. The reason that there are 3 U and not 5 U is due to rate limiting on the ICMP responses.
HTH
Rick

Airport Express Static

Hi - I switched my Airport Extreme connection to "static" as I am using it to control my network instead of my FIOS router. My question is, do I need to switch my Airport Expresses I use to extend my network to static as well?

If you have put the FiOS router into Bridge mode (disabled DHCP server and/or NAT server, also turned off its WiFi radio) and just made it Fiber to Ethernet modem, then I do NOT think you should be Configuring your Airport Extreme with a Static IP address. About 5 years ago, I had FiOS (before I moved) and I do seem to recall I could configure the actiontec modem/router/WiFi device to turn off its router, so unless FiOS has changed the behavior for their router, it makes sense that you can do it too.
I did not read all of the Podfeet page, but the part about static IP address seemed to be using a non-routing local network IP address that would only be valid behind a router, not for the router's Internet facing WAN port.
NOTE: I have Comcast, and I had them put their modem/router/WiFi device in "Bridge" mode, turning off routing and the WiFi radio, and I use my own Airport Extreme as the router. My Airport Extreme is setup to get its IP address via DHCP from Comcast. I then use Ethernet to create a Roaming network via Ethernet to another Airport Extreme in "Bridge" mode. It also gets its IP address via DHCP from the 1st Airport Extreme.
For my Macs, I take advantage of the Airport Extreme "DHCP Reservations" to give various device in my home constant IP address. The devices still use DHCP to get their addresses, but when talking to my Airport Extreme acting as my router, they always get the same IP address. It is similar to giving each of my home devices a static IP address, without needing to configure each of the devices.
HOWEVER, I do not give the Airport Extremes Static IP address, and I most definitely DO NOT give the Airport Extreme acting as my router a Static IP address, as Comcast will not be amused if I mess up the network addressing on their side of the modem.
Switching gears:
I do not have an Airport Express, so I have to speculate based on Airport Extremes.
Unless for some reason you need to address a device attached to the USB port (and you should be able to Bonjour for that), I think you can use DHCP, and let the other Airport Express devices acquire their IP address from the Airport Extreme router.
Just configure the Airport Express' to "Extend a Wireless network". If you can run Ethernet from the Airport Extreme to the Airport Express, it would be more WiFi efficient to not need to relay network packets via WiFi. In that case you would use Bridge Mode, and create a new WiFi network with the same WiFi name and password, but on a different channel to avoid radio interference (for 2.4GHz channels keep them 5 channels apart). Otherwise the Airport Express' extending will be fine.
2 final things. This question is not really right for the "Using Apple Support Communities" forum. You would be getting more attention if you were asking this in one of the operating system related forums (like the one for the version of Mac OS X you are using), or the "Mac OS X Technologies" forum.
Second, assuming you have a recnet version of Mac OS X (Mavericks, Yosemite), I would suggest doing a WiFi scan using WiFi menu -> Option-Click -> Open Wireless Diagnostics -> Wireless Diagnostics -> Utilities -> Wi-Fi Scan, then do a scan and see if there are any interfering WiFi base stations from your neighbors. With 2.4GHz try to say 5 channels away from strong signals. Smaller negative RSSI numbers mean a stronger signal, and higher negative 'noise' values indicate less interference.
You can also use it to very that you have turned off the FiOS WiFi radio (I used this trick to verify that Comcast really turned off the radio in their modem/router/WiFi device - they had to do it twice because I was checking ).

Support Query ASA 5525

Hi,
I want to understand difference between CON-SNT-A25K9 & CON-SW-A25K9. My question is if I suggest CON-SNT will suffice or I need to consider both the components. As per my understanding CON-SNT includes Hardware replacement, TAC access and update upgrade OS options. Please clarify.

Hi Fritz,
Normally underrun errors causing because of the over subscription / when you have the Qos enabled in your ASA.
If you have Qos enabled for that interface. You c an try to by disabling the Qos on that interface.
Minimize the sub-interfaces created on an interface.
And then you can try to maximize the throughput by distributing the traffic between 2 BUSes. If you have this option.
3 Maximizing Throughput (ASA 5550)
The ASA 5550 has two internal buses providing copper Gigabit Ethernet and fiber Gigabit Ethernet connectivity. For Slot 1 (Bus 1), you can use either the copper ports or the fiber ports. The copper ports are enabled by default.
For maximum throughput, configure the ASA so that traffic is distributed equally between the two buses. Lay out the network so that traffic enters through one bus and exits through the other.
For example, the following figure shows the ASA configured so that traffic from the unsecure network and the secure network is evenly distributed between Bus 0 and Bus 1. Traffic from hosts on the secured network flows through interface 0/0 on Bus 0 to hosts on the unsecured network. Traffic from hosts on the unsecured network flows through interface 1/0 on Bus 1 to hosts on the secured network.
HTH
Regards
Karthik

Connecting Xserve to Procurve via copper sfp

Does someone have expiriance in connecting Apple Xserve RAID to procurve 2824 via 2.9-meter Fibre Channel copper cable with embedded SFP transceivers that came with the Apple Fibre Channel card.
We failed to do so as 'Fault', 'Self Test' and 'Port' LEDs on the switch entered an simultaneous blinking pattern indicating an error.
Any suggestions...
TNX!
Zoran

I'm not surprised there's an error.
The ProCurve 2824 is an ethernet switch.
The XServe RAID uses fiber channel.
These are not compatible.
Despite the fact they use similar connectors, you cannot run a fiber channel link over an ethernet switch. You need a fiber channel switch to do that.
The SFP GBIC slots on the ProCurve are there to enable the use of fiber for ethernet (e.g. to get past cat-5's 100m cable length limit). The port won't accept anything other than an ethernet GBIC.

Cisco ONS15454E - Configuration

Hi
I want to configure it on the cisco DCT with the following speca can anyone help me to build the product configuration.
•5.1.1      SDH multiplexer shall be installed in IT/Telecom room. It shall be capable of transmission and cross-connection of packet based data flows and operate as Terminal or Add/Drop multiplexer.
•5.1.2         The plug-in cards shall be of the following types:
STM-64 optical unit
10/100BaseT Ethernet unit
Gigabit Ethernet rate adaptive unit
Optical Gigabit Ethernet with RPR capability
Fiber channel
Ethernet switch unit.
•5.1.3         SDH multiplexer shall have two separate STM-64 modules for connecting with redundant path to Station F. Each direction (East and West) shall be connected to different STM-64 module over L-64.2 interface.
•5.1.4         10Gbps STM-64 optical interface be in accordance with ITU-T G.707 and G.957 and have following characteristics:
Bit rate in accordance with ITU-T G.707
Optical characteristics in accordance with ITU-T G.957 and G.691
Interface: L-64.2 with inline optical power monitoring
Control of input jitter and wander shall be in accordance with ITU-T G.825.
Control of output jitter shall be in accordance with ITU-T G.825.
Characteristics in accordance with ITU-T G.783.
Automatic laser shutdown in accordance with ITU-T G.958.
•5.1.5         10/100BaseT electrical interfaces shall be in accordance with IEEE 802.3u.
•5.1.6         Gigabit Ethernet shall be realized over 1000BaseLX interface. The card shall allow for transport of a gigabit Ethernet signal, guarantee QoS between end points and comply with: IEEE 802.3z, ITU-T G.707, G.783 and G.7042. LX interfaces shall be realized as SFP modules.
•5.1.7         Gigabit Ethernet module shall support IOS, RPR and switching capabilities and shall be fully transparent with existing Cisco ONS15454 ML card.
•5.1.8         SDH multiplexer shall as minimum support following virtual paths: VC-12, VC-3, VC-4.
•5.1.9         Multiplexing, mapping, framing, alignment, adaptation shall be in accordance with ITU-T G.707 and G.783.
•5.1.10      SDH multiplexer shall support ring protection scheme in accordance with ITU-T G.803, G.783 and G.841. The switching time shall be less than 50ms.
•5.1.11      SDH multiplexer shall support card protection functionality providing restoration of faulty cards to redundant hot-standby cards.
•5.1.12      SDH multiplexer shall support four different sources of synchronization:
STM-N traffic port
2Mbps traffic port
External 2048kHz source in accordance with ITU-T G.703 over electrical 120Ohm interface
Internal timing generator in accordance with G.813
•5.1.13      In case lost of reference clock, two modes of operation of SDH multiplexer shall be available: holdover and free-running. In holdover mode Synchronization Equipment Timing Generator shall hold the frequency of the last valid reference with a maximum drift of 0.37ppm per day. In free-running mode local oscillator shall provide reference clock. The accuracy of the local oscillator shall be 4.6ppm.
•5.1.14      Protection:
Control and communication unit 1:1
Clock reference system: 1+1
Cross-connect matrix: 1:1
Power supply module 1+1.
•5.1.15      Control unit shall communicate with external management system through a standard TCP/IP.
•5.1.16      Control unit shall be responsible for applying the configuration requested by the Management system, to report the status of the equipment, send alarm and performance information and to drive automatic protection switching.
•5.1.17      Cross connecting shall be non-blocking. Minimum capacity for cross-connects is 384 x 384 VC-4s unidirectional ports (60Gbps).
Thanks & Regards
Saurav

Hi,
refer the below link:
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/8_5_1/ccmsys/accm-851-cm/a05mtp.html
Regards,
Venkatesh

SerDes vs. SGMII SFPs?

On our product, the SFP cages are hooked up directly to the SerDes pins coming off the switch.
We're trying to understand the consequences of doing this vs. say having an SGMII interface hooked to that cage.
There appear to be both SGMII and SerDes versions of 1000Base-T SFPs. For example, the Black Box LFP417:
http://www.blackbox.com/Store/Detail.aspx/SFP-with-SerDes-Interface-1-25-Gbps-Copper-1000BASE-T-Extended-Diagnostics/LFP417
is a 1000Base-T SFP with a SerDes interface, while the LFP416:
http://www.blackbox.com/Store/Detail.aspx/SFP-with-SGMII-Interface-1-25-Gbps-Copper-10-100-1000BASE-T-Extended-Diagnostics/LFP416
is a 1000Base-T SFP with an SGMII interface.
So the first question...
Q1: Do our customers have to buy the right kind of 1000Base-T SFPs to use with a product wired like this, e.g. SerDes SFPs? Since apparently SGMII SFPs are more common, is that an issue?
Q2: What happens if you insert an SGMII 1000Base-T SFP into a SerDes-wired SFP cage? Will it work? Will it auto-negotiate with another switch? Will it support 100Mbps operation or only 1Gbps?
Q3: What happens if you insert a SerDes 1000Base-T SFP into an SGMII-wired SFP cage? Will it work? Will it auto-negotiate with another switch? Will it support 100Mbps operation or only 1Gbps?
Now, in looking at fiber gigabit Ethernet SFPs I'm not seeing this distinction. The SFPs I find for sale don't say whether they are SGMII or SerDes compatible. So again looking at Black Box, they have only one 10km 1310nm single mode 1000Base-LX SFP for sale.
Q4: If we have a SerDes-wired SFP cage, can you use any fiber 1000Base-LX SFPs you like, or only ones that are SerDes compatible?
Q5: If we have an SGMII-wired SFP cage, can you use any fiber 1000Base-LX SFPs you like, or only ones that are SGMII compatible?

Hi VTmaint,
Since the xraid does not support 4 Gb it does not make sence to put such an sfp in.
The xraid's throughput is in practise much slower than the 2Gb FC port. There is not much to expect from such an upgrade anyway.
You can use the 4Gb's sfp on the host though. You can connect to multiple xraid luns and get a higher throughput (through a FC switch).
Regards
Donald

Fiber to ethernet

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