Metro Switches
Hi Sirs:
What are the main tech features to call some device a "Metro Switch"? What Do they have, common LAN switches don´t?
As I read it, 'metro switch' is equal parts marketing differentiator and technical features. On the tech side, it's generally support of features such as MPLS or POS that allow and Ethenet switch to integrate directly with a carrier's transport network without the need for protocol conversion - e.g. the Ethernet frames are moving intact (potentially encapsulated) through a carrier infrastructure.
This Q&A document may help somewhat: http://www.cisco.com/en/US/partner/netsol/ns577/netqa09186a008010597a.html
Hope this helps. Please rate helpful posts.
Similar Messages
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EoMPLS with Catalyst 3750 Metro Switches
Hi,
I am trying to setup an EoMPLS tunnel (VLAN mode) between two 3750 Metro switches. But I am not getting the Status down from the both PEs.Also the 'show mpls l2transport binding' shows no output interface and no label stack is attached. Can anybody in the forum help me out? Is it any IOS related problem.
The IOS version is:c3750me-i5k91-mz.122-25.SEG1.bin
Thank you,
Dabraj Sarkar
Grameenphone Ltd,
Dhaka, BangladeshHi,
can you provide the related config? Without this it is hard to tell anything.
Regards, Martin -
How do you set up priority queueing on a 3400 metro switch?
running IOS 12.2(40)SE. This seem to do strict priority queueing only which means that that queue will be serviced until it is emptied, then other queues will be serviced.
We will be pumping lots of voice calls through a few of these 3400s on a metro fiber ring and I need to apply the appriopriate QOS for voice. I'm familiar with LLQ in the router world and autoqos in the 3750/3650 switch world, but not with this switch.
Is there a white paper that speaks directly to VoIP on the 3400? The QOS section of the config guide doesn't help when looking for config examples for voice except to state that voice can be mapped to the priority queue, but it is not LLQ based.
I don't want to police voice because the potential of dropped packets could affect all calls, but I need to make sure that voice traffic gets priority over all else - without starving out the other traffic.I understand that - and thank you for responding. However I am extremely leary of policing voice traffic because any dropped packets will affect voice conversation.
Maybe I should set up a policer that is much larger than the total amount of voice traffic I ever expect to have on the link. Say I'll have a possible 100 G-711 calls at any given time. In the LLQ world I'd carve out a priority queue of 10meg to insure all those calls get prioritized. In the 3400 world should I police say at 12meg?
What I'm not clear on is the concept of strict priority queueing - that that queue will be serviced at the expense of all other queues whenever there is traffic in it. Would I expect there always to be voice traffic in the queue if the link is a gig link, and 10mb of voice traffic is going through that queue constantly? Or will the gig interface pull those packets out of the queue so fast that all other non-priority traffic will get transmitted from the other queues just fine? -
3750 metro switch does not support Dot1q??
Folks,
I have a 3750 metro series switch and i am trying to use it to do inter vlan routing. I do not see an option for "encapsulation dot1q" under sub interface?? why is it not supported??
ThanksNavin,
This question has been answered under "Network Infrastructure".
Josef. -
We are facing some multicast issue in our metro network, some time some fof the channels are getting freezed, when I checked the source router, i am not getting any porbelm, the VLC works fine, we have aroung 30 Nos of HD channel in the network and around 600 FTA channel also, I also notice the most of our ME3750 and ME3400 is having platform drops.Below is our topology.
I am not able to isolate the issue, is it core or aggrigation router side isue as i am not getting any logs over there and there is no interface erros also.
Metro-------(G0/1)ME3400(f0/2)-------CPE---------STB----------TV
Metro-------(G1/1/1)ME3750(f1/0/2)-------CPE---------STB----------TV
is this normal, or do we need to take with SR.
ME3750
pa10-th-mf-idf2-a2#show platform port-asic stats drop
Port-asic Port Drop Statistics - Summary
========================================
RxQueue 0 Drop Stats: 0
RxQueue 1 Drop Stats: 0
RxQueue 2 Drop Stats: 0
RxQueue 3 Drop Stats: 0
Port 0 TxQueue Drop Stats: 0
Port 1 TxQueue Drop Stats: 0
Port 2 TxQueue Drop Stats: 0
Port 3 TxQueue Drop Stats: 0
Port 4 TxQueue Drop Stats: 962
Port 5 TxQueue Drop Stats: 0
Port 6 TxQueue Drop Stats: 0
Port 7 TxQueue Drop Stats: 0
Port 8 TxQueue Drop Stats: 46
Port 9 TxQueue Drop Stats: 0
Port 10 TxQueue Drop Stats: 0
Port 11 TxQueue Drop Stats: 0
Port 12 TxQueue Drop Stats: 0
Port 13 TxQueue Drop Stats: 309589
Port 14 TxQueue Drop Stats: 0
Port 15 TxQueue Drop Stats: 0
Port 16 TxQueue Drop Stats: 0
Port 17 TxQueue Drop Stats: 0
Port 18 TxQueue Drop Stats: 0
Port 19 TxQueue Drop Stats: 0
Port 20 TxQueue Drop Stats: 0
Port 21 TxQueue Drop Stats: 0
Port 22 TxQueue Drop Stats: 0
Port 23 TxQueue Drop Stats: 0
Port 24 TxQueue Drop Stats: 0
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Supervisor TxQueue Drop Statistics
Queue 0: 0
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Queue 3: 7554
Queue 4: 0
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Port-asic Port Drop Statistics - Details
========================================
RxQueue Drop Statistics
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pa10-th-mf-idf2-a2#show controllers cpu-interface
ASIC Rxbiterr Rxunder Fwdctfix Txbuflos Rxbufloc Rxbufdrain
ASIC0 0 0 0 0 0 0
ASIC1 0 0 0 0 0 0
cpu-queue-frames retrieved dropped invalid hol-block stray
rpc 0 0 0 0 0
stp 95384659 0 0 0 0
ipc 0 0 0 0 0
routing protocol 695837768 0 0 0 0
L2 protocol 3723925 0 0 0 0
remote console 0 0 0 0 0
sw forwarding 528812 0 0 0 0
host 1354246 0 0 0 0
broadcast 502335 0 0 0 0
cbt-to-spt 0 0 0 0 0
igmp snooping 686313716 0 0 0 0
icmp 0 0 0 0 0
logging 0 0 0 0 0
rpf-fail 0 0 0 0 0
dstats 0 0 0 0 0
cpu heartbeat 317097361 0 0 0 0
One of the ME3400 switch in tower
pa5-tw-l12-idf5-a2#show platform port-asic stats drop
Port-asic Port Drop Statistics - Summary
========================================
RxQueue 0 Drop Stats: 0
RxQueue 1 Drop Stats: 0
RxQueue 2 Drop Stats: 0
RxQueue 3 Drop Stats: 0
Port 0 TxQueue Drop Stats: 0
Port 1 TxQueue Drop Stats: 0
Port 2 TxQueue Drop Stats: 0
Port 3 TxQueue Drop Stats: 1269
Port 4 TxQueue Drop Stats: 48656
Port 5 TxQueue Drop Stats: 0
Port 6 TxQueue Drop Stats: 8688
Port 7 TxQueue Drop Stats: 46403
Port 8 TxQueue Drop Stats: 42513
Port 9 TxQueue Drop Stats: 105940
Port 10 TxQueue Drop Stats: 0
Port 11 TxQueue Drop Stats: 0
Port 12 TxQueue Drop Stats: 0
Port 13 TxQueue Drop Stats: 0
Port 14 TxQueue Drop Stats: 0
Port 15 TxQueue Drop Stats: 39985
Port 16 TxQueue Drop Stats: 22096
Port 17 TxQueue Drop Stats: 258859
Port 18 TxQueue Drop Stats: 0
Port 19 TxQueue Drop Stats: 0
Port 20 TxQueue Drop Stats: 0
Port 21 TxQueue Drop Stats: 0
Port 22 TxQueue Drop Stats: 0
Port 23 TxQueue Drop Stats: 0
Port 24 TxQueue Drop Stats: 0
Port 25 TxQueue Drop Stats: 0
Supervisor TxQueue Drop Statistics
Queue 0: 0
Queue 1: 0
Queue 2: 0
Queue 3: 0
Queue 4: 0
Queue 5: 0
Queue 6: 478
Queue 7: 0
Queue 8: 0
Queue 9: 0
Queue 10: 0
Queue 11: 0
Queue 12: 0
Queue 13: 0
Queue 14: 0
Queue 15: 0
Port-asic Port Drop Statistics - Details
========================================
RxQueue Drop Statistics
Queue 0
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Weight 1 Frames: 0
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Queue 1
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Port 0 TxQueue Drop Statistics
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Port 4 TxQueue Drop Statistics
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Port 7 TxQueue Drop Statistics
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Port 8 TxQueue Drop Statistics
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Queue 0
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Queue 1
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Queue 2
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Queue 3
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Port 25 TxQueue Drop Statistics
Queue 0
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Queue 1
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Queue 2
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Queue 3
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Supervisor TxQueue Drop Statistics
Queue 0: 0
Queue 1: 0
Queue 2: 0
Queue 3: 0
Queue 4: 0
Queue 5: 0
Queue 6: 478
Queue 7: 0
Queue 8: 0
Queue 9: 0
Queue 10: 0
Queue 11: 0
Queue 12: 0
Queue 13: 0
Queue 14: 0
Queue 15: 0Hello Reccardo,
The ingress interface is already set for 100Mb
downlink to user
interface FastEthernet1/0/5
description ****Link connected to xxxxx****
switchport trunk encapsulation dot1q
switchport trunk native vlan 999
switchport trunk allowed vlan x.x.x.x.x
switchport mode trunk
switchport nonegotiate
switchport protected
switchport port-security maximum 8
switchport port-security
switchport port-security aging time 60
switchport port-security violation restrict
switchport port-security aging type inactivity
speed 100
storm-control broadcast level 10.00
no cdp enable
spanning-tree portfast trunk
spanning-tree bpduguard enable
ip dhcp snooping limit rate 100
uplink to PE
interface GigabitEthernet1/1/1
description Link to
switchport trunk native vlan 999
switchport trunk allowed vlan x.x.x.x.x.x
switchport mode trunk
ip arp inspection trust
udld port aggressive
spanning-tree guard loop
ip dhcp snooping trust
interface GigabitEthernet1/1/2
description Link to
switchport trunk native vlan 999
switchport trunk allowed vlan x.x.x.x.x.x
switchport mode trunk
ip arp inspection trust
udld port aggressive
spanning-tree guard loop
ip dhcp snooping trust
Regards
-Saji -
URGENT: MPLS P/ PE support on 7600/Sup720-BXL and 3750 Metro switch
I'm need to design a MPLS network for a Cable Operator.
They will start small with some Cisco CMTS doing MPLS-PE and needing only two devices to aggregate these PE and delivering Services (Internet connection, VoD, ...) , so they will need to work has P/PE.
For that I want to know if it's possible to:
1 - Use 3750 Metro and 7600/Sup720-BXL as P and PE
2 - Who many customers (L2VPN/VLANs and/or L3VPN/VRF) can they support?
Searching in CCO I found these values/features but, need URGENT to check:
1 - sup720-bxl supports P and PE but 3750 only PE?
2 - 3750 supports 1024 VLANs and 8,192 MPLS labels but no values on L3VPN/VRF?
SUP720 supports more than 1000 VRF?
Really need urgent HELP on this design/capabilities for these two devices.
Thanks in advance,
MP
Network Consultant - CCIEbefore you even get anywhere close to the numbers of L2/L3 on a 7200 I would seriously consider asking what throughput you can get through a 7200 with MPLS, QOS, L3vpns and L2vpns configured. I have done this testing already but dont think it is appropriate to quote the figures publically.
-
Use of Metro ethernet switches
Folks,
I have looking at a sample config for EWS. The senario has 3550's at the enge and 6500 at the core. 6500's were doing the Q-IN-Q functionaility to carry customer vlan over provider vlan.
My question is where would a 3750 series metro switch be useful. Lets say i had a 7600 P.E which also have Q-IN-Q functionility, why would i buy a 3750 if i was a provider?
ThanksHello,
simplified one driving factor for Q-in-Q is port cost. The cost of an ethernet port on a 7600 is higher than the same port on a 3750. So for a SP serving many customers and potentially in need of hundreds of ethernet customer ports, it means that the hardware invest will be lower and therefore competitiveness in the market will be better.
Hope this helps! Please rate all posts.
regards, Martin -
Is a L3 switch able to receive a WAN link? if the WAN circuit presentation is ethernet?
Hi experts,
The question is if a L3 switch is able to receive a WAN link which is Ethernet, at the same way than a router?Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
To add to what Jody has already posted, L3 switches often lack features commonly found on routers. Often such features are WAN related. Jody mentioned one common WAN feature, NAT, but they might also lack certain hardware resources, such as sufficient capacity to take one or more full Internet route tables.
Even when running across MetroE clouds, often LAN L3 switches are still a bit "weak", for such usage, which is why Cisco has a series of MetroE switches.
The forgoing doesn't mean you cannot use a LAN L3 switch, just you need to be careful matching what the switch can do with your WAN feature needs. -
Metro Ethernet implementation questions
I am planning a Metro Ethernet upgrade for a network I manage. This is the first time I’ve implemented Metro on any network. I’m looking for some suggestions and answers to a couple questions regarding this upgrade.
The current network is Hub and spoke connected by copper lines to 17 different locations from a DS3 @ our HQ. HQ also has a DS3 to the internet which the branch locations go out for internet. At our branches we have a private and public network on different subnets. Each branch location has either a T1 or bonded T1 connected to a Cisco 2801 router then to Netgear PoE managed switch(s).
The upgrade of the DS3 for internet is going to 100 meg. The data side will also be 100meg at HQ, 10meg to our small locations and 100meg to the large.
My question is what do I need to be aware of on our existing network that must change to get this working?
1) Will I simply go from the layer2 Metro Switch to our router?
2) Should I remove the router and go directly to the Netgear switch?
3) Do I need to VLAN the private and public networks?
4) Do I need to change routing tables?
Thoughts and/or suggestions welcome.
Let me know if more information is required to assist in answers.
ThanksHi,
I think it would be better to include Cisco Account Manager/SE for this upgrade, they can guide you better and can come up with LLD for this upgrade, otherwise upgrading your 17 sites without proper planning can cause you serious issues.
Yasir -
Metro Ethernet Design With Redundant Head Ends
We're getting ready to turn up some metro ethernet circuits that were just installed by AT&T. AT&T has provided a VLAN for each remote site (so each site has its own VLAN), and those VLANs are trunked to our head end switches (Cisco 3750 Metro Switches).
I'm struggling with the best design for IP routing. We currently use OSPF on our internal network, and I was going to extend OSPF to our metro solution as well, but I'm not so sure now.
I don't want routing to occur directly between head end #1 and head end #2, we already have redundant paths within our corporate network, and allowing our two head ends to route between each other via our metro ethernet solution is not what we want. However, running OSPF on each of the VLANs which have been provisioned for us would permit routing between the head ends.
We simply need to allow redundanny for our remote locations in the event that one head end were to fail, all of the traffic to/from the remote site would be routed through the head end which is still online.
Anyone suggestions on the best routing design for this situation would be greatly appreciated. I've attached a network diagram to make things clear. I believe I can also go back to AT&T and request one VLAN that includes all sites if that would simply things. I just need to make sure I can still do our traffic shaping because the remote sites are only 10mbps and the head ends are 1gbps.
Thanks,
-Stevejust at a glance it looks as if you should be able to have stp on and setup 1 site as primary and other as secondary
-
Comparison between 3750 and 3750-metro
hi folks,
is there any links which will provide me on the comparison between 3750 and 3750-metro? for exapmple, isis is not support on 3750 but it support on 3750-metro. The product information from cisco site is insufficient in term of the main differences :p
rgd
josh.wHi Josh,
The Cisco Catalyst 3750 Metro Series is built for Metro Ethernet access in a customer location, enabling the delivery of more differentiated Metro Ethernet services. These switches feature bidirectional hierarchical QoS and Traffic Shaping, intelligent 802.1Q tunneling with class-of-service (CoS) mutation, VLAN translation, MPLS, EoMPLS, and Hierarchical Virtual Private LAN Service (H-VPLS) support, and redundant AC or DC power. They are ideal for service providers seeking to deliver profitable business services, such as Layer 2, Layer 3, and MPLS VPNs, in a variety of bandwidths and with different SLAs.
The metro switches have the PXF chips (which allow hierarchical QoS on the 2 "WAN" GigE ports, so several logical links can share a connection, and have soft bandwidth limits).
For more details on 3750-M switches have a look at this link
http://www.cisco.com/en/US/products/hw/switches/ps5532/products_qanda_item09186a00801eb822.shtml
HTH
Ankur
*Pls rate all helpfull post -
Traffic Shaping on 6880 between sites over metro ethernet
Hi
I have a new dual site setup with 6880s at the core at one side and 3650 stack at the other. We have a 200mbps ethernet solution from our service provider but on testing we are maxing at a bit over 100mbps, iperf tests directly on the link are giving 200mbps so I need to apply some shaping to get the full usage from the link. In the past I have used srr bandwidth on metro switches but the 6880s don't support this. So I assume I need to setup policy maps and apply to the physical interface? The interfaces are layer 2 trunks and we are stretching vlans between the sites. E.g. siteA has vlan20 and site B has vlan 20 over the metro ethernet service, site b is layer2 only and all routing and services are provided at siteA
Is it as simple as this? It seems too easy :) So I may be missing something. I just apply this on the physical interface at each side?
policy-map POLICY-S2S-200MB
class class-default
shape average 204800000
policy-map POLICY-S2S-200MB-IN
class class-default
police cir 204800000
conform-action transmit
exceed-action drop
~
int gi1/1/1
service-policy out POLICY-S2S-200MB-OUT out
service-policy out POLICY-S2S-200MB-IN in
Your input would due treaty appreciated!
Thanks,
Aidan.Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Ah, well that's great! (Hmm, now I wonder if same feature is available on 6500 with sup2T or 6807.)
In that case, your output policy might be just as simple as what's in your OP. Cisco isn't really clear whether all their shapers (or policers) are counting L2 and L3 or just L3. I suspect many just count L3. If that's true in this case, you may need to shape about 10 to 15% slower to allow for L2 overhead (this assuming your provider is providing 200 Mbps of "wire" bandwidth.
If you're able to shape on the other side, then there should be no need to also police the ingress. Also, assuming provider limits bandwidth, there's no reason to police ingress at CIR rate. -
Switch having feature of VPN & Packet Filtering
Can someboady help me to know the low end Switch that can be configured for VPN, Packet Filtering etc... within a switch itself?
SureshHi Suresh,
If you are deploying MPLS VPN then you can got for 3750 metro ethernet switches as well.
The configure vpn in cisco switch Catalyst Metro switches are a new line of premier multilayer switches that bring greater intelligence to the metro Ethernet edge, enabling the delivery of more differentiated metro Ethernet services. Featuring hierarchical quality of service (QoS) and traffic shaping, intelligent 802.1Q tunneling, VLAN mapping, Multi-protocol Label Switching (MPLS) and Ethernet over MPLS (EoMPLS) support, and redundant AC or DC power, these switches are ideal for service providers seeking to deliver profitable business services, such as Layer 2, Layer 3, and MPLS VPNs, configure vpn in switch a variety of bandwidths and with different service-level agreements (SLAs). With flexible software options, the Catalyst Metro offers a cost-effective path for meeting current and future service requirements from service providers serving enterprises and commercial businesses.
HTH,Please rate if it does.
-amit singh -
How to request missing Visio stencils?
There are several Visio stencils that are missing from the library that I need. They're important to me (and I imagine others want them too) as I need to do rack elevation diagrams. I hate to open a TAC case on them but not sure what else to do. Any thoughts?
The stencils I require are:
ASA5510 (Rear view - the side with the interfaces)
ME-C6524GT-8S (Rear view - the side with the power supplies) - 24 Ethernet - 10/100/1000 interfaces + 8 Gigabit Ethernet SFP uplinks, 1 fan tray
PWR-400W-AC - 400W AC power supply for the Cisco ME 6524
PWR-400W-DC - 400W DC power supply for the Cisco ME 6524
ME-C3750-24TE-M (Rear View - the side with the power supplies) - Cisco Catalyst 3750 Metro
PWR-ME3750-AC - Cisco Catalyst 3750 Metro Switch Primary AC power supply
PWR-ME3750-DC - Cisco Catalyst 3750 Metro Switch Primary AC power supply
CheersHello Peter,
There is no problem with the R42610 rack stencil. The problem is with some of the older Catalyst 45xx shapes that were produced by another vendor before we became involved 2 years ago. Unfortunately they were not designed correctly to fit into racks. My group is producing shapes that work properly with this rack as well as rack shapes from other sources. I apologize for the inconvenience this causes but unless the product group authorizes us to re-create the older devices they will not match. You can see proper fit behavior with the 4500-X shapes that we produced.
Your note alerted me to an error that the web group made when posting the Catalyst 4500-X stencil. I had asked for a new link separate from the 4500, which is what the product group prefers. Instead, they replaced the 4500 download file with the 4500-X download file. I've asked them to correct that so that you will have access to the 4500 and 4500-X shapes in separate downloads and stencil files. I do not know how long this will take to complete.
On the Catalyst 4000 stencil there are icons fro a PWR-C45-1000AC, PWR-C45-1300VAC, and PWR-C45-2800VAC but no PWR-C45-1400AC. The shapes on this stencil were also produced by the previous vendor. These power supplies seem to fit properly into the C4503 chassis but the chassis will not fit properly into the rack for the reasons explained above.
Please note that you can always download the Table of Contents and Index file (near the top of the Visio download page) and search for a part number to locate its download stencil.
I hope this is at least partially helpful.
Regards,
Brett Newman
Cisco Visio Production
Visimation Inc. -
Hi,
My customer has a question, what is the limit for entries for the route-map for PBR that will be done in hardware? This applies to soft-4900M 12.2 (53) SG2. I need a reference to documentation.
Regards,
lbHi Lukasz,
the 4900M is a Data Center Switch and not a Metro one, so it is more appropriate if you post these types of questions on Network Infrastructure > LAN Switching and Routing section
(the 4900M should not be confused with the ME4900 series, which are Metro switches instead).
Anyway it supports 128.000 Security and Quality-of-Service (QoS) Hardware Entries as documented here:
http://www.cisco.com/en/US/products/ps6021/prod_models_comparison.html
and here:
http://www.cisco.com/en/US/partner/prod/collateral/switches/ps5718/ps6021/ps9310/Data_Sheet_Cat_4900M.html
regards,
Riccardo
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