DSLAM metro ethernet ring

Dear All
In my one solution I need to connect IP DSLAM and L3 switcheh to form metro ethernet ring.
Will it be possible. Is DSLAM with Gigabit eternet interface is exist, if yes pls suggest the product.
Anand

Hi Anand,
Check this link from Lightreading, it gives some nice information about IP DSLAM vendors and specifications. You can check what is your exact requirement.
http://www.lightreading.com/document.asp?doc_id=74391&site=lightreading
sultan

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STP/RSTP/MST in a Metro Ethernet ring

We are building a large Metro ethernet Network . The topology consists of BN ( cat 3550 switches ) on a GIG ethernet ring . We intend to use 14 Building node (3550)siwtches in the ring and then aggregate the Gigabit ring onto a 7609 at the Aggregation site .
Can anybody suggest whether I should use RSTP or MST and minimise the convergence/reconvergence period in cases of fiber cut on the ring .
Hrishikesh

Of the two, RSTP is the simpler techonology, while
MST obviously scales better. There are more edge
cases to consider with MST, and we concluded it
needed lots more lab testing before we would be
comfortable with it. RSTP (in Cisco's Rapid-PVST
version) is very simple to deploy.
We are using Rapid-PVST everywhere we can.

IP DSLAM and Ethernet ring

Dear All,
I need to make a gigabit ethernet ring with L3 Switches and IP DSLAMS. That is the switch ethernet port is connected to IP DSLAM ethernet uplink port and the other ethernet uplink port of same DSLAM is connected to the other L3 switch ethernet port and simeleraly form a ring.
Is this type of network ring is possible which have switches and IP DSLAM in same ring.
If yes pls send any case study of this type architecture.
I waite for your quick responce.
With Regards
Anand

hi anand
which model or type of switches & ip dslams ur gonna deploy to form this ring ?
coz i did face some interoperability probs with Cisco switch and Ericsson Dslams..
Afaik its fine between Cisco switch and Lucent Dslams,but we didnt install them off in a ring mode.
though the main core was in ring mode using cisco swtich the connectivity to the dslam is just a spur and it didnt come or form any ethernet ring..
do revert if u need more details on the same..
regds

Metro ethernet, Ethernet protection ring.

Hi everybody.
I hope everybody is doing great. A quick question for you guys.
Let say we have Ethernet switches connected in a ring .We want to use Ethernet protection ring for loop avoidance and faster convergence.
One of the switch will be RPL owner, and of the link in our ring will be chosen as RPL link.
1)My question is what is the criteria for RPL owner selection and RPL link? ( For e.g in STP, we use lowest bridge priority for root bridge)
2) Is Ethernet protection ring provide an alternative to stp when we switches connected in ring toplogy and fast convergence is required as is the case with metro ethernet commonly ?
Have a great evening.

Dear Friend
If you want to deploy and use L2 VPN service you should
define whst is he type of core
do you want to use L2 VPN service based on IP or MPLS?

Integrating Metro Ethernet to DSLAM

Dear friends,
I am very new to Metro Ethernet and currently I am facing a solution problem. The thing is my customer want to deploy a MEtro Ethernet Network, which in turn they should be able to interconnect to a DSLAM network. The specific customer requirements are below, i am getting smoke out of my ears working on this.
1) Deploy a Metro ethernet network and integrate it to DSLAM network
2) Design should be such that customers of my customer (SP) can change his bandwidth limitations. For eg: if the SP's customer wants to have a video conferencing for a few hours then say for some 4 hrs he/she should be able to change the provided bandwidth. The SP should be able to monitor and bill for this.
3) As a section of this Metro Ethernet solution a part should be able to provide video,data,voice and other near future application on EXISTING RJ 11 telephone wire connection at the customer places.
I have only 1.5 yrs experience in networking and that too only on configuring and installing routers,RAS FW switches etc. I have never been to Solution providing and this is the first one. I dont want to lose it. can any one help ???
Pleeeeeeeeease !!!!!!!!!!!!

Hi,
Your requirment seems to be preety simple as far as metro ethernet deployment is concerned.
Suggest you to look for Cisco Service Selection Gateway ( SSG ) feature set on Cisco 72xx,73xx,10K series routers. With SSG coupled with SESM , users have flexibilty of change the bandwidth on the fly and SP can bill him accordingly.
Apart from the requirement of bandwidth change , i would like to make a point that your customer should go for ADSL 2 or 2 + for catering triple play services ( voice,video and data )
As far as metro e network is concerned i would have gig ethernet bandwidth in the backhaul .
If the customer is not so Cisco Savvy , you can look for Juniper SDX platform , which supports COPS !!! ;)
you can reach me a [email protected] for any assitance required .
Raj

Metro Ethernet

Hi all
iam trying to Build metro Ethernet in my own town
I have office with a distannce of 10Km
i want to bring them in metro ring and connect failover ring
So i have 5500 Switch at central end
and I have 2 3750 Switched with LH Giga Module SFP in it 2 ports
Now iam confused, what kind of CARDs i need to Buy for 5500 so i can integrate with 3750SFP ports with 5500 with ring protection
I have in 5500 Supervisor III with 100MB MMF,
What kind of Modules need to connected with 3750 ( situated other 2 office)
so all 3 going to be in ring protection
help will be appriciated
hari

yes, you can integrate with 3750SFP ports with 5500 with ring protection .
CISCO WS-X5302=. Catalyst 5000 Route Switch Module will be module that can be used.

Suggest No. of routers in a single metro-ethernet Vlan

Hi,
Just would like to know if there is a recommended no. of routers to put into a single metro-ethernet vlan. The local Metro-ethernet provider suggest 10 routers per vlan but I think 30-50 would be OK ?

This question is like how many nodes can you put into a VLAN. For an answer to be given your traffic types would need to be known. How chatty are your routers? Are you bridging? What type routing / bridging traffic (non-unicase) might you have on the wire? Baseline data from your environment is important to answer this question. There is no hard fast recommendation for this just as there is none for numbers of nodes in a VLAN or router is an OSPF area. This is completely dependant on your environment.
Hope this helps,
Don

VPLS and H-VPLS w.r.t Metro Ethernet

Can someone please explain me VPLS and H-VPLS as to how it can be used in a Metro Ethernet Environment????Any diagramatic explanation will be highly appreciable...
Regards,
NISHA

Thanks a lot for the presentations Harot...
As I'm a bit new to MPLS technology, I have some doubts in my mind so far Layer 3 VPNs are concerned. Let's consider a typical Scenario :
CE-->PE-->P-->P-->PE-->CE....
Could u pls tell me where MP-BGP runs (whether in PE to P or PE to CE b'coz somewhere i read the protocol used between PE-CE is MP-BGP and that's why I'm confused) and what is it's purpose. So far I know MP-BGP is run in order to make the VPNv4 routes unique i.e IPV4+VPNv4. I would highly appreciate ur feedback if u explain the layer 3 concept entirely protocol wise...i.e IGP, MP-BGP in a MPLS domain. What I know so far is CE-PE protocol can be anything right from static to BGP. P-PE is MP-BGP.
Kindly pl. correct me wherever I'm wrong...
Thanks in advance...
NISHA

Customer Equipment for Metro Ethernet Link

Hi All
It has been some time since I utilised Cisco network kit to provide private circuit point to point connectivity and I wonder if someone could give me a little guidence.
The customer is shortly to implement a new 100Mb Metro Ethernet link to connect two of their branches. They initially intend to use the link for data only traffic but eventually will want to route VOIP traffic across the link so bandwidth management and QoS will be essential components. It is unlikely that further links will be added to this link so built in expansion of the chosen routers may not be required.
Budget will be an issue on this so I would appreciate any advice or recomendations.
Thanks
J.

Hello James,
I think it would be better to get in touch with your Cisco Account Team as this question cannot be answered on a forum post.
Thanks,
Karim

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.
Thanks

Hi,
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

Best way to detect failure in Metro ethernet networks

Hello ,
I am working for a well known provider and I am currently migrating one of my client from Frame-relay to Metro-ethernet link .
I am actually looking for advices on what sort of mechanism to implement to detect a failure in the ME parth .
As you probably know , failure on one of the links might cause the CE-SWITCH-PE interfaces to stay up/up and the network will not neceseraliy start converging .
So far I have implemented BFD along with IP SLA route tracking , I am happy with BFD but the IP SLA is acting "weird" .
- IP SLA ICMP tracking rely on ICMP packets and was too sensitive to packets lost
- We switched to ip route sla tracking but I am still unsure about the best way to use or implement this .
Is there some sort of best practices available somewhere for this ?
thanks ¨
T

Hello Thomas,
From what i have seen BFD is best bet as it allows to relax the L3 protocols timers ( BGP / any other protocol used between CE- PE ). Another option is to have gre tunnel between the PE - CE link and track this tunnel interface.
Regards,
Shreeram

Alerts for metro ethernet link

Hi,
Kindly let me know " How to enable alerts for metro ethernet link"
Thanks..

Hello Gureshi,
they are probably referring to OAM, CFM and other mechanisms to detect link or service failure in metro ethernet scenarios
see
http://www.cisco.com/en/US/docs/switches/metro/me3400e/software/release/12.2_52_se/configuration/guide/swoam.html
Hope to help
Giuseppe

Metro Ethernet Design question

Hello,
I was wondering how service providers guarantee their security protection in the Metro Ethernet model, especially when Internet is one of the applications used over the Metro network.
For example: The customer edge switch (3550) is connected directly to the service provider aggregation layer(either Cisco Catalyst 4500 and 6500 Series switches ) .
In the network core, Cisco 12000 or Cisco 7600 Series routers.
So where is the security devices in this architecture, where is the firewalls, the IDS/IPS, that protects the service provider core from any threats.
Providing the customer with Internet in Ethernet switching technology the service will put the provider in a vulnerable position.
Am I thinking wrong here?

Hi
The CE will be hardened using storm control both multicast as well as broadcast on the ports where the end users are connected.
About the accesiability between the other users who are connected on the ports of same switches you have switchport security coded which will take care of the access violation part.
Also the maximum no of MAC address which can be permitted/allowed over the ports.
This inturn will send u a trap and can shut the port if theres any violation detected on those ports..
In the next layer where u say 6500 or 7600 u will have FWSM modules which will be taking care of filtering and other funtionalities which is very much similar to a standalone PIX firewall.
you can have redundandcy or even load balancing with
the FWSM modules over there in the 6500 switches.
And ofcourse the IP addressing schemes deployed would be in private scopes and will have either NAT pools or PAT enabled in the FWSM.
you got to have more n more ACLS on all the devices to mitigate the general known worms/virus or their variants in the network applied in applicable points.
regds

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,
-Steve

just 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

Metro Ethernet in RAIL Transportation (MRTS) applications

Dear Sir,
I have a query related to Metro Ethernet technology.
We are into TRANSPORTATION SYSTEMS. We are coming up with a MRTS Project in Mumbai , India. We are at a planning stage at the moment. As per our experience, companies in RAIL MRTS Applications are using SDH technology (MUX and access multiplexers).
Could you please suggest , should we go for METRO ETHERNET of SDH Technology.
Are there any players/ any Metro Projects who have implemented Metro Ethernet ( instead of SDH).

Hi Pankaj
What kinda applications you are going to use and what kinda bandwidth requirement you have in place ?
Also do revert back the number of locations and a bit more onto your topology which mite help to get back with our suggestions..
regds

DSLAM metro ethernet ring

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