| reply to johnnn
Re: [Speed] Congested Comcast Peering with Akamai, Google in MidIt may be that your local router is being upgraded... in your first post Hop 3 indicated a 'te' interface.
When I just tracerouted to it now, it's showing as a 'xe' interface.
3 20 ms 10 ms 10 ms 96.120.41.137
4 12 ms 7 ms 7 ms xe-8-2-0-sur01.grandrapids.mi.michigan.comcast.net [68.86.140.185]
5 17 ms 19 ms 27 ms te-0-2-0-4-ar01.taylor.mi.michigan.comcast.net [69.139.254.29]
6 18 ms 17 ms 19 ms xe-7-3-0-sur01.wannarbor.mi.michigan.comcast.net [68.85.218.201]
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 DrDrewSo that others may surf.
join:2009-01-28
SoCal
kudos:9 | said by depster:It may be that your local router is being upgraded... in your first post Hop 3 indicated a 'te' interface.
When I just tracerouted to it now, it's showing as a 'xe' interface.
3 20 ms 10 ms 10 ms 96.120.41.137
4 12 ms 7 ms 7 ms xe-8-2-0-sur01.grandrapids.mi.michigan.comcast.net [68.86.140.185]
5 17 ms 19 ms 27 ms te-0-2-0-4-ar01.taylor.mi.michigan.comcast.net [69.139.254.29]
6 18 ms 17 ms 19 ms xe-7-3-0-sur01.wannarbor.mi.michigan.comcast.net [68.85.218.201]
It's a different interface of the same router. OP's being from the edge of the network inbound, yours being from the core of the network outbound.
--
Two is one, one is none. If it's important, back it up... Somethimes 99.999% availability isn't even good enough. |
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johnnn
join:2007-01-25
Ypsilanti, MI | DrDrew is right. When I do tracerts *to* the edge they travel through an xe interface. |
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 EGThe wings of lovePremium
join:2006-11-18
Union, NJ
kudos:9
1 edit | reply to depster
FWIW, just a point. As Dr.Drew stated, it's the same physical router. This data needs to also be examined when evaluating the rDNS info on hops;
te-8-2-ur02
xe-7-0-sur01
Even though the IP address is the same, the slot, port, and ring data is different.
Some examples of some meanings;
Some examples;
ge = gigabit ethernet.
te / xe= ten gigabit ethernet.
p, po, pos = Packet Over Sonet (an OC-3 or faster connection).
XE / TE = Juniper / Cisco 10GigE Interface
be / ae = Cisco Bundle Ethernet / Juniper Aggregate Ethernet
he = hundred gigabit ethernet.
1-1, 1-2, 1-11, 6-1, 9-1, 2-2, etc. = slot and port.
ar01, cr01, ur01
User Ring (UR), Area Ring (AR), Core Ring (CR) routing. |
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johnnn
join:2007-01-25
Ypsilanti, MI | EG, you're the best. |
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EGThe wings of lovePremium
join:2006-11-18
Union, NJ
kudos:9 | I doubt that but thanks for your kind words !  |
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 whfsdudePremium
join:2003-04-05
Washington, DC
 ·T-Mobile US
| reply to EG
said by EG:User Ring (UR), Area Ring (AR), Core Ring (CR) routing.
The one I've never understood is "SUR." I have yet to see this interface name used outside of Comcast. Happen to know? |
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johnnn
join:2007-01-25
Ypsilanti, MI | 
New interface on the | 
KS route | 
CA route | 
Peak time comparison |
There was likely some sort of maintenance window on Friday morning as evidenced by the smokeping graphs attached (this makes sense, as it corresponds with the lowest utilization period for the college town I'm in). Comparing the ICMP performance for peak windows between this week and last, there's been a significant improvement. |
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Reviews:
 ·Comcast
·T-Mobile US
| reply to EG
said by EG:ge = gigabit ethernet.
te / xe= ten gigabit ethernet.
p, po, pos = Packet Over Sonet (an OC-3 or faster connection).
XE / TE = Juniper / Cisco 10GigE Interface
be / ae = Cisco Bundle Ethernet / Juniper Aggregate Ethernet
he = hundred gigabit ethernet.
1-1, 1-2, 1-11, 6-1, 9-1, 2-2, etc. = slot and port.
ar01, cr01, ur01
User Ring (UR), Area Ring (AR), Core Ring (CR) routing.
holy cow man. Thanks for this information. I know it's pretty trivial for non-comcast network engineers, but it really helps add some light into where my packets go when they leave town. |
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| reply to whfsdude
said by whfsdude:said by EG:User Ring (UR), Area Ring (AR), Core Ring (CR) routing.
The one I've never understood is "SUR." I have yet to see this interface name used outside of Comcast. Happen to know? Maybe Switched User Ring? |
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makazePremium
join:2004-02-23
USA | said by depster:said by whfsdude:said by EG:User Ring (UR), Area Ring (AR), Core Ring (CR) routing.
The one I've never understood is "SUR." I have yet to see this interface name used outside of Comcast. Happen to know? Maybe Switched User Ring? Nah it's a Super UR. In most areas it's a juniper with multiple AR connections for redundancy. |
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johnnn
join:2007-01-25
Ypsilanti, MI | So based on the info in this thread, the changes in throughput (things are much improved), and the routing changes I've observed, it looks like Comcast hooked my neighborhood's CMTS (and likely all of wannarbor) into a Super UR whereas before it routed through two regular 10GigE URs on its way to the AR in Pontiac. |
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