Copper vs Fiber Uplinks on 2960

What are the advantages/disadvantages of using the gig copper uplinks instead of the sfp uplinks on the 2960, or on any switch for that matter, aside from security and distance limitations? A 48 port SFP blade on the 6500 costs a lot more than a 48 port copper 10/100/1000 blade, not to mention the gbics and fiber jumpers.

It's pretty much as you describe , security, distance limitations also copper is more prone to electromagnetic interference . Other than that I wouldn't think there would be much difference .

Similar Messages

LOOP_BACK message on fiber uplink connect to Extreme switch

I have a network where 2960X switches, one in each closet, are connected to an Extreme core switch. The fiber uplink of each 2960X is connected via an 802.1q trunk with VLAN 1 as the native VLAN. The Extreme switch is set to not tag VLAN 1. The Extreme switch is pruned to basically only send the untagged VLAN 1 and another tagged VLAN. Unfortunately, this network admin is using VLAN 1 as the mgmt network and has VLAN 1's SVI assigned an IP address in the 10.X.X.X/16 range.
we keep getting a LOOP_BACK message on the finer uplink of the 2960X switch which then goes into errdisable mode. Loopbacks are supposed to be disabled by default on fiber ports, but there is a bug in this code of 2960X IOS that send them anyways. I have disabled the ability for the 2960X to errdisable the uplink with the "no errdisable detect loopback" command. The network now stays running, but we keep getting the message. A new code is going to be released soon to fix this bug.
I am telling the admin that the message indicates a larger issue within the network, probably a loop. Has anyone run into this issue when connecting Cisco switches to Extreme switches? I have read some stuff on PVST+ not being a great solution on Extreme switches. It seems you can enable it, but VLAN 1 and the untagged VLAN are not supported. I am trying to figure out how I can possibly be receiving my loopback packet back on my uplink port.
I am going to suggest a great number of design changes to this network (not using VLAN1, MST, L3 links across the core) next week during a meeting, but I am hoping there is an Extreme wiz out there that could help me understand some caveats to connecting Extreme switches to Cisco switches. Thanks in advance!

I have connected Extreme to Cisco is the past and have seen STP incompatibility issues but since it was a long time ago I can't remember what was the problem. Can you provide a diagram of your network?
HTH

Trouble uplinking to 2960 switch

Hello,
Just installed a new 2960 switch.
Everything is working except that I am no longer to uplink a small unmanged linksys switch that is leftover from previous configuration.
I am using x-over cable and have tried adjusting switchport modes.
If I use a straight through cable, The link goes up and down constantly. If I use a x-over cable, the link stays up but no communications.
What am I doing wrong?
-Brian
www.jaydien.com

Brian,
I would guess that the problem your having is a line speed negotiation problem. Without the specific models numbers of the equipment and the ports being used on the equipment for the uplink, it is just a guess.
All Linksys switches auto cross over. While this function can be disabled (on most models), it should not be an issue.
You may be plugging your Linksys into the 10/100/1000 of the 2960 which may be confusing the Linksys terribly if it is only 10/100. Try one of the 10/100 ports on your 2960 or statically set the line speeds on one or both devices, where available.
Get those model and port numbers and we will look deeper.
Thanks,
Chris

Uplinking Stacked 2960S with Etherchannel

I'm in the process of configuring the uplink of two stacked 2960S to a 3560X that is not stacked.
My plan is to configure 2 ports in each of the stacked 2960S' for a total of 4 Etherchannel members. On the other side, I'd configure the 3560X with a 4 member channel.
Would the configurations below work for what I intend to do?
#Configurations in 2960S Stack members
2960SMaster(config)int range g1/0/1 - 2
channel-group 1 mode active
2960SMember(config)int range g2/0/1 - 2
channel-group 1 mode active
#Configurations in 3560X core switch
3560X(config)int range g0/23 - 26
These configurations are based on article that deals with a similar scenario (except for two sets of stacked 3750's)
http://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/69979-cross-stack-etherchannel.html
Additional questions:
- These configurations assume LACP. Is there a reason not to use LACP here?
- Both sides are set to active, but I've seen it configured also in active-passive. Would I derive any benefit from one approach or the other?
- And finally, the n00b question. Do I use regular Ethernet cable or do I have to use cross-over?

- These configurations assume LACP. Is there a reason not to use LACP here?
No reason at all. LACP is the standard and PAGp is Cisco
- Both sides are set to active, but I've seen it configured also in active-passive. Would I derive any benefit from one approach or the other?
Active actively tries to negotiate whereas passive listens for lacp frames. You can use active/active or active/passive, but you won't be able to use 2 passive.
- And finally, the n00b question. Do I use regular Ethernet cable or do I have to use cross-over?
Regular cables should be fine.
The other things you need to keep in mind is that the ports in the channel group need to be configured the same way - speed, duplex, same vlans, etc. in order for them to for an etherchannel.
HTH,
John

2960 dual purpose uplink ports

Hello folks, I just need to confirm the uplink ports for the 2960.
The Data sheet shows.....
WS-C2960-24TC-L
â¢ 24 Ethernet 10/100 ports and 2 dual-purpose uplinks (each dual-purpose uplink port has one 10/100/1000 Ethernet port and 1 SFP-based Gigabit Ethernet port, 1 port active)
â¢ 1 RU fixed-configuration
â¢ LAN Base Image installed
Does this mean that I can only have 1 active uplink port (interface) at a time?
Or
Does it mean that I can use either Copper or Fiber at a time?
Thanks in advance I appreciate your help.
Regards,
JP

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Or one port as copper and one port as SFP.
Basically, the a copper and SFP port are paired, either of the pair can be used, but not both of the same pair at the same time.
As you have two uplinks, you have two pairs.

Port Channel Issue on Cisco 2960s-24ts

Hi All
Last week at a customer site we installed a 2nd 2960s 24 port switch to form a stack using flexstack cables, and the switch stack is working as expected as I can see a master switch and 2nd switch as a member.
For redundancy / resilience we decided to use port 24 on each switch over copper for trunk uplinks to our core switch. The issue that we're having is I can't ping the switch management address. I can however see the address in the arp table and the edge switch is visible when I run show cdp nei. As a work around I've shutdown one of the ports to the downlink from core to edge in order to ping the management address of the switch which is in vlan 1. I'd like to get the port-channel working on both sides for resilience.
ANY HELP IS APPRECIATED...
Core switch is a WS-C3750G-24TS-1U running software version C3750 Boot Loader (C3750-HBOOT-M) Version 12.2(25r)SEE4, C3750 Software (C3750-IPBASE-M)
Edge switch is a WS-C2960S-24TS-L running software version C2960S Boot Loader (C2960S-HBOOT-M) Version 12.2(53r)SE,C2960S Software (C2960S-UNIVERSALK9-M)
The config on the edge switch which goes to the core is :
interface GigabitEthernet1/0/24
description *****
switchport mode trunk
channel-group 6 mode on
end
interface GigabitEthernet2/0/24
description *****
switchport mode trunk
channel-group 6 mode on
end
interface Port-channel6
description ******
switchport mode trunk
end
The config on the downlink ports from the core to the edge:
interface GigabitEthernet1/0/20
description Edge
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 20 mode on
end
interface GigabitEthernet2/0/20
description Edge
switchport trunk encapsulation dot1q
switchport mode trunk
shutdown
channel-group 20 mode on
end
interface Port-channel20
description Edge
switchport trunk encapsulation dot1q
switchport mode trunk
end

when using channel-group # on mode you must make sure the ports are on same duplex and speed setting
what happens when you use active mode?

Fiber & Cat5 LAN

Hey,
Im looking for some hardware for a network for 800+ clients... The building the network is designed for is very large and therefore no matter where there is a central server room, CAT 5 will not be able to reach... I could link the cat 5 between switches right back to the core but with the number of clients Im afraid this will produce a sizeable bottleneck...
I was thinking of using fiber... However I have never had any experience with fiber networks...
Basically what I am looking for is a fiber optic switch with 8-16 ports... I was looking a MM fiber with MT-RJ connectors... I was wondering if any one could recommend some optic switches that would work... I also need two 24port 10/100/1000 switches and 4 48port 10/100/1000 switches using cat 5 cable that are able to plug into the fiber switch...
So I need....
One 8-16 port fiber switch...
Then I need a few gigabit switches that can be connected the fiber switch via an uplink port or GBIC card or what ever... I also then need to connect the fiber switch the server back bone...
Im also looking to add wireless APs to the 10/100/1000 24/48 port switches... What is recommended for the number of clients... As not all clients will be using a wired terminal..?
Any advice & recommended hardware would be greatly appreciated.
Thanks,
NW

Hi,
Yes that 24S should do the job, I guess is depends on the locations of the switches and the port densisty you need, plus how much money you want to spend and how much redundancy you want.
Your alternative would be something like a 4500 filled with 100FX module and/or copper modules, plus redundant supervisor modules and power supplies.
The 24FX is multimode MTRJ, plus SFP uplink ports
the TS (G models) are 24/48 10/100/1000 copper with SPF uplink ports
and there is a 12S with consists of 12 SFP ports.
The SFPs are essentially small GBIC (1GB) modules that come in various types, shorthall or longhaul. The SFPs have LC connectors
The 12S model could be filled with SX SFPs giving you 12 gigabit multimode connections
You can also stack the 3730s to give you a combination of switchports on one logical switch.

ASR 1001 Router enquiry on fiber handoff

Cisco ASR 1001 Router would support fiber hand-off of the link. Below is the Specifications of the Router - we received from vendor:
Description
Quantity
Cisco ASR1001 System,Crypto, 4 built-in GE, Dual P/S
1
Cisco 5-Port Gigabit Ethernet Shared Port Adapter
1
1000BASE-LX/LH SFP transceiver module, MMF/SMF, 1310nm, DOM
2
Cisco ASR1001 AC Power Supply
2
Power Cord India, Right Angle
2
Cisco ASR 1001 IOS XE UNIVERSAL - NO ENCRYPTION
1
Cisco ASR 1000 IP BASE License
1
SPA for ASR1000; No Physical Part; For Tracking Only
1
Cisco ASR1001 4GB DRAM
1
PRTNR SS 8X5XNBD Cisco ASR1001 System,Crypto
1
PRTNR SS 8X5XNBD Cisco ASR 1000 IP BASE License
1
PRTNR SS 8X5XNBD 5-Pt Gigabit Enet Shared Pt Adptr
1
Datacenter feature: There will be fiber connections already installed at the DMZ site from the meet me telco room to the partner racks. Therefore, your service provider must understand that they will do a circuit handoff to fiber and order the routers, interface cards, connectors, etc. to support fiber circuit extension.

You can use standard Ethernet copper or Fiber, providing that you have the correct SFP/GBICs.
As long as you have the correct SFP's you need for the ASR - All should be good.
http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/install_upgrade/ASR1000/ASRintro.html#wp1235447
http://www.cisco.com/en/US/prod/collateral/modules/ps5455/ps6577/product_data_sheet0900aecd8033f885.html
hth

Five Story Building Fiber Link Speeds

I am designing a new model and am really grappling with the fiber uplink speeds. I am trying to build a network resilent enough to support data for the next ten years. I am trying to decide if I need a 10 gig fiber uplink to my data center on the third floor of the building from each of the adjacent floors. I am planning on running a 48 port gigabit switch on each floor, and at the moment without VOIP. But I'm trying to peer into my crystal ball for years down the road to see what my requirements will be. Currently we are a 10/100 based LAN with all the normal windows domain things, file shares, exchange, internet, etc. I could also concatenante some 1 gig fiber links, say 4 per floor, to get to almost half the bandwidth but with multiple fiber strands.
Either way I was just hoping for some feedback. There are advantages to each, I'm just worried as my switches begin to max out the ports, and the computers and network start utilizing the gigabit bandwidth more that my uplinks will begin to be the bottleneck, not today or tomorow, but a few years down the road. Am I crazy? Any help would be greatly appreciated, or a link to a thread that has already addressed this issue.
Thanks,
Jason
Network Admin
The Blood Center

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It’s not easy to comment on how your technology strategy for the next 10 years should be since I do not know anything about what the organization is doing or which applications we can expect on the network.
The easy answer will be to use the highest bandwidths and best switches you can get but this comes with a price that might give you a bad ROI the next 5 years. So what you can do is to look in to the future and predict if video, cloud computing, or any other high bandwidth applications will be present in this infrastructure. And the answer to that should be yes – sure… etc. But when is also a key question. So for your design you should plan ahead and see what you need now and if there is better to upgrade later. Do you then want to do a forklift upgrade and replace everything, or do you want to replace some components / interfaces to get higher bandwidth? You can address now that you have a technology strategy that points out the direction for the next 10 years, and you have a plan on how to build this new network now according to this strategy. You should address that i.e. after 5 years you need to do the next step and invest to upgrade the network according to the strategy to gain higher bandwidth, better SLA or any other upgrade that is critical for the business.
Even if you go for 10Gbps now it might not be what you need in the future. And even if you have a 10 year scope for your strategy you should occasionally do a sanity check and patch up your strategy to meet the requirements from the organization you are going to support, and to be aligned with the technology development.
/André

Port isolation between two SRW swiches connected through fiber?

Hi guys,
i have one SRW2024P connected through fiber to SRW2048. I would like to create isolated link between these two switches consisting of at least one isolated port at each switch. Can this SRWs do this?
Alternatively i need on the SRW2048 side few PoE ports so do you know any 16+ port PoE switch that can do this?
THX for answer.

Do you mean you want a port on each switch to be able to communicate with each other but not with any other ports on the switches ?
i.e PC host at 192.168.1.3 on port 2 on switch 1, to be able to ping a IP host at 192.18.1.2 on switch 2 port 3 ?
If this sort of functionality is required you want to create a new vlan to the switch. If it is not the case please explain in more detail what you want and ignore the following.
regards Dave
Om my srw2008P i would do the following, i guess your interface is almost identical to my switch GUI interface.
step 1 create a vlan, maybe vlan 2
[make sure you scroll down to the bottom of the page at each step and save changes]
step 2. alter alter port x to be a untagged member of vlan 2
step 3 modify the vlan interface setting on both switches to make the fiber uplink port a trunk in vlan 2.

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

3750 and 3850 fiber trunk

I currently have two 3750's (stacked). We recently purchased two new 3850's and have stacked them as well. My question is, how to I trunk them? I want to be able to use the new switches with the same vlans and IP addresses as the existing. The new switches are in the same rack as the existing ones.
The current 3750's are the gateway for my network (and they will remain as such, for the time being).
I connected a fiber uplink from switch to switch as in:
3750a (gi 1/0/49) --> 3850a (gi 1/1/1)
3750b (gi 2/0/49) --> 3850b (gi 2/1/1)
I gave the fiber ports the following settings:
3750a:
int gi1/0/49
switchport trunk encaps dot1q
switchport trunk allowed vlan add ALL
switchport mode trunk
switchport nonegotiate
3750b
int gi2/0/49
switchport trunk encaps dot1q
switchport trunk allowed vlan add ALL
switchport mode trunk
switchport nonegotiate
3850a / 3850b:
Gi1/1/1
Gi2/1/1
switchport trunk allowed vlan add ALL
switchport mode trunk
switchport nonegotiate
At this point, I thought I would be able to ssh into the new (3850) switch and ping the current (3750), but I cannot. Network assistant on the curent 3750 switch "sees" the new 3850, but has it listed as "unsupported device". The swiches are on the same subnet (10.11.1.0 /24).
Gateway switch (3750) is 10.11.1.2 and new 3850 is 10.11.1.14. If I plug my laptop into the 3850 and give myself a 10.11.1.x IP, I can ping the switch itself (10.11.1.14), but I cannot ping the gateway (10.11.1.2). If I SSH into the switches, I cannot ping one another.
Do I need to set up the fiber uplinks as an Etherchannel? Or are my switchport settings incorrect? I'm not sure what I am missing. I am in no way an expert on this, so even if its something that may be obvious to others, it is entirely possible I overlooked it.
Hope this makes sense. Any suggestions would be appreciated. Thank you.

Hello, I am still having an issue with this. Below is the configuration for the 3850. I need to mention that there are some routes that are going from the 3750 (ATL core switch) to our Houston location. I don't want to affect those. Here is the new 3850 config:
3850
cisco 3850 is 10.11.1.14
10.11.1.2 is 3750 (core)
Jon#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is 10.11.1.2 to network 0.0.0.0
S* 0.0.0.0/0 [0/0] via 10.11.1.2
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.11.1.0/24 is directly connected, Vlan1
L 10.11.1.14/32 is directly connected, Vlan1
Jon#sh int port-chan 11
Port-channel11 is up, line protocol is up (connected)
Hardware is EtherChannel, address is bc67.1c2c.8f31 (bia bc67.1c2c.8f31)
MTU 1500 bytes, BW 2000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 44/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is
input flow-control is off, output flow-control is unsupported
Members in this channel: Gi1/1/1 Gi2/1/1
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 1/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 346438000 bits/sec, 60724 packets/sec
5 minute output rate 219000 bits/sec, 393 packets/sec
1035330112 packets input, 736325645076 bytes, 0 no buffer
Received 364858179 broadcasts (342729785 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 342729785 multicast, 0 pause input
0 input packets with dribble condition detected
7065898 packets output, 503248621 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
Jon#
Jon#sh int port-chan 11 trunk
Port Mode Encapsulation Status Native vlan
Po11 on 802.1q trunking 1
Port Vlans allowed on trunk
Po11 1-4094
Port Vlans allowed and active in management domain
Po11 1,10,41,70,72,110,112,172,192,222,310,400,410,722,999
Port Vlans in spanning tree forwarding state and not pruned
Po11 1,10,41,70,72,110,112,172,192,222,310,400,410,722,999
Jon#sh int port-chan 11 switchport
Name: Po11
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
Jon#
Jon#sh vlan br
VLAN Name Status Ports
1 default active Gi1/0/1, Gi1/0/2, Gi1/0/3
Gi1/0/4, Gi1/0/5, Gi1/0/6
Gi1/0/7, Gi1/0/8, Gi1/0/9
Gi1/0/10, Gi1/0/11, Gi1/0/12
Gi1/0/13, Gi1/0/14, Gi1/0/15
Gi1/0/16, Gi1/0/17, Gi1/0/18
Gi1/0/19, Gi1/0/20, Gi1/0/21
Gi1/0/22, Gi1/0/23, Gi1/0/24
Gi1/0/25, Gi1/0/26, Gi1/0/27
Gi1/0/28, Gi1/0/29, Gi1/0/30
Gi1/0/31, Gi1/0/32, Gi1/0/33
Gi1/0/34, Gi1/0/35, Gi1/0/36
Gi1/0/37, Gi1/0/38, Gi1/0/39
Gi1/0/40, Gi1/0/41, Gi1/0/42
Gi1/0/43, Gi1/0/44, Gi1/0/45
Gi1/0/46, Gi1/0/47, Gi1/0/48
Gi1/1/2, Gi1/1/3, Gi1/1/4
Gi2/0/1, Gi2/0/2, Gi2/0/3
Gi2/0/4, Gi2/0/5, Gi2/0/6
Gi2/0/7, Gi2/0/8, Gi2/0/9
Gi2/0/10, Gi2/0/11, Gi2/0/12
Gi2/0/13, Gi2/0/14, Gi2/0/15
Gi2/0/16, Gi2/0/17, Gi2/0/18
Gi2/0/19, Gi2/0/20, Gi2/0/21
Gi2/0/22, Gi2/0/23, Gi2/0/24
Gi2/0/25, Gi2/0/26, Gi2/0/27
Gi2/0/28, Gi2/0/29, Gi2/0/30
Gi2/0/31, Gi2/0/32, Gi2/0/33
Gi2/0/34, Gi2/0/35, Gi2/0/36
Gi2/0/37, Gi2/0/38, Gi2/0/39
Gi2/0/40, Gi2/0/41, Gi2/0/42
Gi2/0/43, Gi2/0/44, Gi2/0/45
Gi2/0/46, Gi2/0/47, Gi2/0/48
Gi2/1/2, Gi2/1/3, Gi2/1/4
10 VLAN0010 active
VLAN Name Status Ports
41 VLAN0041 active
70 VLAN0070 active
72 VLAN0072 active
110 VLAN0110 active
112 VLAN0112 active
172 VLAN0172 active
192 VLAN0192 active
222 VLAN0222 active
310 VLAN0310 active
400 VLAN0400 active
410 VLAN0410 active
722 VLAN0722 active
999 VLAN0999 active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
Jon#
Jon#sh ip int br | ex un
Interface IP-Address OK? Method Status Protocol
Vlan1 10.11.1.14 YES NVRAM up up
Jon#sh int gi 1/1/1 switchport
Name: Gi1/1/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk (member of bundle Po11)
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
Jon#
Jon#sh int gi 2/1/1 switchport
Name: Gi2/1/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk (member of bundle Po11)
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
Jon#sh vtp sta
VTP Version capable : 1 to 3
VTP version running : 1
VTP Domain Name : SU4
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 6cfa.8961.ae80
Configuration last modified by 10.11.1.3 at 5-10-96 10:46:01
Feature VLAN:
VTP Operating Mode : Client
Maximum VLANs supported locally : 1005
Number of existing VLANs : 19
Configuration Revision : 21
MD5 digest : 0x91 0x8F 0xCB 0x5F 0x70 0x43 0x35 0x72
0xD2 0xFC 0x18 0x68 0x4B 0xE9 0xED 0x86
Here is 3750 config:
garfield#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is 172.16.1.254 to network 0.0.0.0
C 192.168.40.0/24 is directly connected, Vlan192
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, Vlan172
C 192.168.41.0/24 is directly connected, Vlan41
10.0.0.0/24 is subnetted, 4 subnets
C 10.11.1.0 is directly connected, Vlan10
C 10.11.2.0 is directly connected, Vlan112
C 10.3.3.0 is directly connected, Vlan310
S 10.7.2.0 [1/0] via 10.11.1.57
S* 0.0.0.0/0 [1/0] via 172.16.1.254
garfield#
garfield#sh int port-chan 10
Port-channel10 is up, line protocol is up (connected)
Hardware is EtherChannel, address is 0019.e78d.cc31 (bia 0019.e78d.cc31)
MTU 1500 bytes, BW 2000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 0/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is unknown
input flow-control is off, output flow-control is unsupported
Members in this channel: Gi1/0/49 Gi2/0/49
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:10, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
22417 packets input, 2835668 bytes, 0 no buffer
Received 22275 broadcasts (22156 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 22156 multicast, 0 pause input
0 input packets with dribble condition detected
62724237 packets output, 58026872380 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
garfield#
garfield#sh int port-chan 10 switchport
Name: Po10
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
garfield#
garfield#sh int port-chan 10 trunk
Port Mode Encapsulation Status Native vlan
Po10 on 802.1q trunking 1
Port Vlans allowed on trunk
Po10 1-4094
Port Vlans allowed and active in management domain
Po10 1,10,41,70,72,110,112,172,192,222,310,400,410,722,999
Port Vlans in spanning tree forwarding state and not pruned
Po10 1,10,41,70,72,110,112,172,192,222,310,400,410,722,999
garfield#
I want to be able to use the new 3850 with all of my existing vlans.
Any suggestions appreciated. Hopefully, I can get another change window approved so I can try out any new ideas.
Thank you,
JD

Dot1x protocol with fiber inerface

hello,
Is dot1x protocol works well with the fiber interface (1G)?
The connection between the PC (fiber NIC) to the switch will only be through fiber.
If yes, is it work with all kinds of switches (6500,3750,3560....)?
thanks...

Hi. 802.1x is supposed to work with ethernet interfaces no matter if they're copper or fiber.

Why choose Cisco Catalyst WS-C2960-24TC-L Switch ?

As the new family of fixed-configuration standalone devices, Cisco 2960s series intelligent Ethernet Switches provide desktop 10/100 Fast Ethernet and 10/100/1000 Gigabit Ethernet connectivity for entry-level enterprise, mid-market, and branch office networks
to enable enhanced LAN services.
Why choose cisco WS-C2960-24TC-L ?
The Cisco Catalyst WS-C2960-24TC-L has hardware enhancements for network managers, including configurations featuring dual-purpose (alternatively wired) uplinks for Gigabit Ethernet, allowing the network manager to use their Cisco switches as either a copper
or a fiber uplink.

Agreed! WS-C2960-24TC-L has hardware enhancements for network managers, and if you want to buy it, here 3anetwork.com 64%
off, USD 460 !

Distrabuted Access Switch Design

HI,
I have been asked to do some research on a network design that eliminate the need for IDF's or at least the most of them. So we are going to add a new location which will have 3000 drops and instead of running all those drops back to a IDF or MDF, the estimated cost for each drop would be around 400. The plan is to setup switches on the ceiling or somewhere closer the actual drops which would also be more cost efficient. Since you won't need to run the cabling long distance and have to terminate them. Does anyone have any advice or have tried something like this before.

Isn't that how you would do it normally? You would have longer cable runs and potentially bigger IDFs by putting the switches in a closet, but 99% of the time your IDF is going to be fiber uplinked to the core.
The design that you are suggesting really only saves copper cable length. But I don't know how much of a cost savings that is going to be because you are now running 2 fibers from several more IDF switches which means more fiber and more ports used on the core. There's an expense with that.
If you stick with a bigger IDF design then you can use stackable switches and only need 2 uplinks from each IDF closet.

Copper vs Fiber Uplinks on 2960

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