MPLS over ATM and Private IP addresses

Are there any caveats using private IP addresses at one site and public registered IP addresses at another site connecting with MPLS over ATM thru our ISP?

No. You should be able to configure this using NAT.

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Welcome to the MPLS over ATM Discussion

Welcome to the Cisco Networking Professionals Connection Service Provider Forum. This conversation will provide you the opportunity to discuss issues surrounding MPLS over ATM. We encourage everyone to share their knowledge and start conversations on issues such as Frame-based MPLS networks, multiservice networks, VPN scalability, multiple service classes, multicast, VoIP and any other topic concerning MPLS over ATM.
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This is easily done with dial peer statements . The dial peer in your originating router must route the calls to the terminating router first. That would look like :
dial-peer voice xxxxx voip ( the xxxxx is just a tag)
destination-pattern 45... (that would route any 5-digit calls beginning with 45)
session-target ipv4:xxx.xxx.xxx.xxx (ip address of the terminating router)
If digitones are to be dialed after the connection is established, use the statement:
dtmf-relay-h.245-alphanumeric
You could also use a statement to specify the codec to be used:
codec g711ulaw
You would need multiple voip dial peers if the calls were going to different routers based on the dialed digits. If all calls are sent to the same terminating router, use all wild cards in the dest-pattern statement.
At the terminating router configure pots dial peers:
dial-peer voice xxxxx pots
dest-pattern 45...
port x/x (whichever port the call is to be terminated on)
prefix 45 (this re-inserts matched digits which are stripped off by the pots dp)
Repeat for other ports which will receive calls.
Paul

Mpls over atm ppp over aal5

Hi,
Does cisco support mpls over atm-ppp-llc
per RFC 2354(PPP over AAL5).
Something like a scenario if Cisco acts as a PE and it gets frames with mpls over atm-ppp-llc from a connected CE ,is it supported in cisco , or it will drop the frames ?
Running mpls over ce-pe link is mandatory for the specific scenario.
Thanks
Thanks in advance

Hello,
The MPLS should be supported also on PPP over AAL5. Simply use the "mpls ip" command on the Virtual-Template or the Dialer interface you are using on top of the ATM VC to set up the PPP interface.
The 3640 with proper IOS can support the PE functions. The Enterprise feature sets should be equipped with all features necessary to provide a PE router functionality - basically, the VRF, MPLS, LDP, MPLS VPN support, BGP, BGP VPNv4 support, IGP protocols with VRF support and that should be sufficient.
Best regards,
Peter

MPLS over ATM encapsulation

Hello,
During I was doing an MPLS interoperability test between our ATM-LER and Cisco 7204 router, I found an implementation difference wrt MPLS over ATM encapsulation between two systems. Our system encapsulates an MPLS packet with null shim label(=0), while Cisco router does it with non-null shim label(!= 0), I guest it may be a VCD value that is internally used in Cisco system. I think that an MPLS over ATM packet should be encapsulated with null label value in the top shim header in accordance with RFC 3035 described below.
"If the packet has a label stack with n entries, it MUST carry a shim with n entries. The actual value of the top label is encoded in the VPI/VCI field. The label value of the top entry in the shim (which is just a "placeholder" entry) MUST be set to 0 upon transmission, and MUST be ignored upon reception. The packet's outgoing TTL, and its CoS, are carried in the TTL and CoS fields respectively of the top stack entry in the shim."
Any response will be greatly appreciated.
Best regards,
Yongjun.

No, I'm NOT requesting a new feature, but talking about compliance with
the MPLS standard, RFC 3035, "MPLS using LDP and ATM VC Switching". What I'm saying is that Cisco router sends an MPLS packet on LC-ATM interface with a VCD (some sort of connection identifer in Cisco router) value set on the top-of-stack label, while the standard specifies the top-of-stack label should be used only for a placeholder and thus MUST be set to '0'. To my best knowledge, most of edge ATM-LSR systems set the top label value to '0' in accordance with RFC 3035. If the ingress edge ATM-LSR (Cisco) forwards an MPLS packet with non-zero label on the top-of-stack, then the egress ATM-LSR has two choices, one is just to ignore the non-zero label value, (causing no problem), the other is to discard the MPLS packet because the top-of-stack label should have been zero and non-zero is invalid. If any implementation selects the latter option, it may not be possible to interoperate with Cisco system through LC-ATM interface.
Regards,
Yongjun.

MPLS over ATM - VP Tunnel (cell) or VC (frame)?

Does anybody use the MPLS over VP tunnel with the Cisco 8540 ATM MPLS core? Is it a stable solution or one should better leave the ATM MPLS cell mode and convert to frame mode over ATM?

Both Cell mode and frame mode are stable solutions. But the scenario where we use them are different. I see that Cisco 8540 ATM MPLS Core is used. In this case, I would say that cell mode MPLS is a better solution for the following reason(s); In normal (non-MPLS) ATM core the L2 topology might be different from L3 topology. Say for example, a destination IP (a.b.c.d) might be shown as 3 hops (routers) away but there can be even 10 or more ATM switches in between. In this case the L2 topology might not be an optimal path. Hence we go for cell mode operation, where we form a full mesh topology and hence an optimal path.

Difrence between ... MPLS over Frame-Relay ATM

Hai all,
Sorry to ask very basic quiestion ..can some one tell what is the difrnce and advantage of MPLS over ATM and Frame-Relay ......pls provide me a better link ..for refrnce
Thanks in advance
Lijesh

MPLS over ATM or MPLS over Frame-Relay it's not good idea, because if you use cell-mode labeling, you find someone limitation at this technology. DLCI and VPI/VCI value at this protocols it's not have large space. If you know how operate cell-mode, try to look at just for sample bits length with DLCI value at Frame-Relay protocol or VPI/VCI value at ATM protocolâ¦ Of course you can use same cheat like VCI-merge, but I think it's not very good idea.
Building new network infrastructure at this protocols it's not good ideaâ¦ It's good idea to fast implement MPLS technology in old network infrastructure build with this protocols (just for sample, you can linked ATM forwarding plane and MPLS forwarding plane (in this situation you can abandon to use fixed configuration VPI/VCI for IP network and can use benefits offered ATM technology with MPLS)), but not for new network infrastructure. If you need to offer services with this protocols, you can use Any Transport Over MPLS technology.
For more information look at this page - http://www.cisco.com/en/US/tech/tk436/tk798/tsd_technology_support_protocol_home.html

Sup32 and mpls over gre

does sup32 on 7600 router support mpls over gre, my uplinks
to the core are connected via sup32?

Hello Atif,
in the following link the datasheet of sup32
http://www.cisco.com/en/US/prod/collateral/modules/ps2797/ps5972/product_data_sheet0900aecd801c5cab_ps368_Products_Data_Sheet.html
table1 contains the following:
Hardware-enabled MPLS-Enables use of VPNs and Layer 2 tunneling while improving traffic engineering for QoS and adding multiprotocol support
• Hardware-enabled IPv6-Expands available IP addresses, enabling better address allocation and address aggregation and supporting greater end-to-end connectivity and services
• Hardware-enabled GRE tunnels for IP traffic
be aware that performances are limited in comparison to sup720 as it is shown in table2.
Hope to help
Giuseppe

HT3477 I am attempting to set up a guest network. When I change the Network settings to DHCP NAT I get a message that tells me that the service has a private IP address and so I must connect using off bridge mode. In this mode I can not connect to the int

I am attempting to set up a guest network on the Airport Extreme Base Station. The Base Station is connected to a DSL Modem. The network is also extended using an Airport Express. When I have attempted to set up the Base Station using DHCP NAT in the netword feature I get a message that because the service has a private IP address the only way that I can connect is in Off Bridge Mode. In this mode I do not seem to be able to connect to the internet using the guest network. Any suggestions would be helpful.

Ok, your Speedport is actually a combination DSL modem and wireless router. In this case you would typically configure a downstream router, like your AirPort Extreme in Bridge mode. Unfortunately, when in Bridge mode, the AirPort does NOT support providing a guest network.
The only possible option is to reconfigure the Speedport as a bridge and use the Extreme as your Internet router. You would still need the DSL modem provided by the Speedport for Internet connectivity.

Over the course of many years I seem through using different computers to have several apple ids and three email addresses, this is causing problems with synchronising, I have an iPod, iPhone and ipad

Over the course of many years I seem through using different computers to have several apple ids and three email addresses, this is causing problems with synchronising, I have an iPod, iPhone and ipad

Hi there
Sorry for hijacking your thread as put by Dahveed. However I have resolved my issue so I thought I'll share it with the rest of you.
I checked for the error 3194 in youtube and I found some good videos that tell you how to resolve the problem. The issue I was facing was the actually (I know because I have resolved it now) the communication between my computer and apple server which can be fixed as following (if you are using windows):
There is file in following directory:
C:\Windows/system32/drivers/etc/hosts
The file normally has no extension and it is in file format. You need to open it and make sure that every line that has apple server id starts with "#". In my case one of the line started directly with the ip address and then gs.apple.com.
Perform your restore/update after that and hopefully it should be resolved (mine did).
Cheers

ATM over Ethernet and pseudowires

Hello.
Could somebody tell me if there is a Cisco Router that can work ATM over ethernet. This ATM circuits comming from an ethernet interface sholuld be transported as pseudowires through an IP/MPLS Backbone. Routers 12000 can do this? wich version do I need?
Thanks

Hi Narayan. Thank you.
I have now the following doubt. If we have the following topology:
lan-(CE)--ethe--(pe)--MPLS--(pe)--atm-(ce)-lan
Consider a lot of atm access at the right side, but we need to use only one vlan at the left side to connect all the remote atm sites.
You are telling me that we can convert the left CE in to a PE. But Can we maintain the router as a CE but terminating the ATM circuits (pseudowires) transported over one one vlan? ( atm over ethernet)
I appreciate everyting.

My chat and private messaging is not working, i can still see everyone who is online but nothing happens when i click on them, I have shut down everything and started over, and still nothing, what do I do?

i can not chat or private message, i can post to others. what do i do

Your UserAgent string in Firefox is probably messed up by another program that you installed. 
[http://en.wikipedia.org/wiki/User_Agent]
type '''about:config''' in the URL bar and hit Enter 
''If you see the warning, you can confirm that you want to access that page.'' 
Filter = '''general.useragent.''' 
Right-click the preferences that are '''bold''', one line at a time, and select '''''Reset'''''. 
Then restart Firefox
Once that is fixed, see if chat and private messaging are still giving you a problem.

Private IP Addressing---? Manual Settings

Our Cbeyond service gives info that we have Private IP Addressing for Network Config. Public IP Addressing is not provided.
Does that mean that I can't use Automatic but must do Manual Settings for Internet Accesss?

Okay I know you are going to ask how.
When you visit the above website actually when you visit any website, it needs to know your external IP address in order to deliver the information from that website to your browser.
What the browser wants to do is send a command to the Web server on www.apple.com that looks like this:
GET /index.html HTTP/1.0
Here's how that happens. The command is made into a packet, a block of bits like a telegram that is wrapped with three important things; the source address (the IP address of your machine), the destination address (17.254.0.91 ), and a service number or port number (80, in this case) that indicates that it's a World Wide Web request.
Your machine then ships the packet down the wire (your connection to your ISP, or local network) until it gets to a specialized machine called a router. The router has a map of the Internet in its memory — not always a complete one, but one that completely describes your network neighborhood and knows how to get to the routers for other neighborhoods on the Internet.
Your packet may pass through several routers on the way to its destination. Routers are smart. They watch how long it takes for other routers to acknowledge having received a packet. They also use that information to direct traffic over fast links. They use it to notice when another router (or a cable) have dropped off the network, and compensate if possible by finding another route.
Once your packet gets to its destination machine, that machine uses the service number to feed the packet to the web server. The web server can tell where to reply to by looking at the command packet's source IP address.
This is your external IP address in other words the website needs to know where to send the webpage information back to.
When the web server returns this document, it will be broken up into a number of packets. The size of the packets will vary according to the transmission media in the network and the type of service.
So why doesn't it supply your internal address, well this is because your router uses NAT and it knows what client on the internal network asked for the information and it is the router (with the external IP address) which asks and therefore when it receives it back, it then forwards it to the client.
As the router asked for the info, it is the router's address which is reported (the external address) and not the internal address.
What this means is that everything you ever ask for on the internet is recorded by the websites you visit.
iFelix
PS In future Gino please start a new topic (referencing the one that sparked the question) to avoid over-complicating topics, thank you.

MPLS over non-MPLS network

A Chairde,
I am nearly sure the answer is no, but will ask anyway.
I want to connect two private networks over a corporate WAN , and am looking to keep the router traffic (BGP) and routing traffic under control.
I only have control of the two lab routers, the routers in middle are controlled by IT dept. , is there anyway of setting up MPLS with this scenario ???
Any other suggestions ......

You could indeed run MPLS over a GRE interface.
If you want to run MPLS VPN, then I would suggest configuring MPLS VPN over l2tpv3. See the following URL for more details:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1829/products_feature_guide09186a00802b4817.html
Let me know if I answered your question,

How to check congestion over ATM ....

Hi,
We have 4 sites connected via ATM and pass VoIP across it.
Each site has a break out point for PSTN over E1s.
We are getting calls routed out the network, presumably due to network congestion.
Our ATM is at about 10% utilisation, so I am assuming it is not the problem.
How can I check on the routers / in Callmanager to find out how many calls are being passed over the ATM and at what point they should be sent outside.
Thanks,
Roy

Look OK to me (though that does not count for much !)
4 sites as follows ....
Site 1
VCD / Peak Avg/Min Burst
Interface Name VPI VCI Type Encaps SC Kbps Kbps Cells Sts
1/0.1 ip 1 32 PVC SNAP VBR 23041 23041 1 UP
ATM1/0.1 is up, line protocol is up
Hardware is RS8234 ATM E3
Description: Link to WAN
Interface is unnumbered. Using address of Loopback0 (172.16.32.1)
MTU 4470 bytes, BW 15380 Kbit, DLY 200 usec,
reliability 255/255, txload 27/255, rxload 4/255
Encapsulation ATM
3693063238 packets input, 836279283496 bytes
4234968585 packets output, 2985021406173 bytes
1242098 OAM cells input, 1242059 OAM cells output
AAL5 CRC errors : 2
AAL5 SAR Timeouts : 0
AAL5 Oversized SDUs : 0
AAL5 length violation : 2
AAL5 CPI Error : 0
Last clearing of "show interface" counters never
Site 2
VCD / Peak Avg/Min Burst
Interface Name VPI VCI Type Encaps SC Kbps Kbps Cells Sts
1/0.1 ip 1 32 PVC SNAP VBR 12289 12289 1 UP
ATM1/0.1 is up, line protocol is up
Hardware is RS8234 ATM E3
Description: IPenabled PVC
Interface is unnumbered. Using address of Loopback0 (172.16.96.1)
MTU 4470 bytes, BW 8192 Kbit, DLY 200 usec,
reliability 255/255, txload 6/255, rxload 25/255
Encapsulation ATM
65698888 packets input, 48152269948 bytes
51070492 packets output, 8186070871 bytes
25607 OAM cells input, 25607 OAM cells output
AAL5 CRC errors : 0
AAL5 SAR Timeouts : 0
AAL5 Oversized SDUs : 0
AAL5 length violation : 0
AAL5 CPI Error : 0
Last clearing of "show interface" counters never
Site 3
VCD / Peak Avg/Min Burst
Interface Name VPI VCI Type Encaps SC Kbps Kbps Cells Sts
1/0.1 1 1 32 PVC SNAP VBR 12289 12289 1 UP
ATM1/0.1 is up, line protocol is up
Hardware is RS8234 ATM E3
Description: Link to WAN
Interface is unnumbered. Using address of Loopback0 (172.16.64.1)
MTU 4470 bytes, BW 8192 Kbit, DLY 200 usec,
reliability 255/255, txload 4/255, rxload 8/255
Encapsulation ATM
2461584158 packets input, 1901335110529 bytes
2109706319 packets output, 510523746062 bytes
1416854 OAM cells input, 1416844 OAM cells output
AAL5 CRC errors : 0
AAL5 SAR Timeouts : 0
AAL5 Oversized SDUs : 0
AAL5 length violation : 0
AAL5 CPI Error : 0
Last clearing of "show interface" counters never
Site 4
VCD / Peak Avg/Min Burst
Interface Name VPI VCI Type Encaps SC Kbps Kbps Cells Sts
1/0.1 1 1 32 PVC SNAP VBR 3072 3072 1 UP
CRTC01CO#
ATM1/0.1 is up, line protocol is up
Hardware is RS8234 ATM E3
Description: Link to WAN
Interface is unnumbered. Using address of Loopback0 (172.16.128.1)
MTU 4470 bytes, BW 2048 Kbit, DLY 200 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ATM
852613330 packets input, 214858179060 bytes
862469522 packets output, 226533712205 bytes
5233929 OAM cells input, 5233904 OAM cells output
AAL5 CRC errors : 0
AAL5 SAR Timeouts : 0
AAL5 Oversized SDUs : 0
AAL5 length violation : 0
AAL5 CPI Error : 0
Last clearing of "show interface" counters never

MPLS over GRE tunnles

HI : Are there any MTU issues of running MPLS over GRE tunnels??
what will be the MTU size ?
thnak you

GRE has an overhead of 24 bytes, and can directly interfere with the MPLS overhead. The MTU associated with an MPLS packet is broken down like so:
Ethernet Payload - 1500
802.1q header - 18
AToM Header - 4 (Required for ATM and FR only)
AToM Label - 4
LDP Label - 4
TE Label - 4
MPLS Fast Reroute - 4
Total = 1538
Granted, you may not configure all of those features above into your MPLS network, this is a good baseline to use for the MPLS MTU. You need to configure the core network to accept an MTU of at least 1538 bytes, without GRE.
You need to ensure that your GRE tunnels can support an MTU greater than 1562 if you plan to implement additional MPLS features like TE and AToM.

MPLS over ATM and Private IP addresses

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