 jlivingoodPremium,VIP
join:2007-10-28
Philadelphia, PA
kudos:1 | reply to jlivingood
Re: Why I am in Philly... So for example I might ask how is performance to cdn.netflix.com?
Comcast DNS in Philadelphia, PA (68.87.64.150)
netflix.vo.llnwd.net.
208.111.160.6
208.111.161.254
PING 208.111.160.6
64 bytes from 208.111.160.6: icmp_seq=0 ttl=50 time=11.169 ms
64 bytes from 208.111.160.6: icmp_seq=1 ttl=50 time=8.923 ms
64 bytes from 208.111.160.6: icmp_seq=2 ttl=50 time=8.738 ms
64 bytes from 208.111.160.6: icmp_seq=3 ttl=50 time=11.508 ms
64 bytes from 208.111.160.6: icmp_seq=4 ttl=50 time=8.057 ms
--- 208.111.160.6 ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 8.057/9.679/11.508/1.389 ms
Then, let's check against DNS @ 4.2.2.1
QUESTION SECTION:
cdn.netflix.com. IN A
ANSWER SECTION:
cdn.netflix.com. 1671 IN CNAME netflix.vo.llnwd.net.
netflix.vo.llnwd.net. 31 IN A 208.111.148.7
netflix.vo.llnwd.net. 31 IN A 208.111.148.6
PING 208.111.148.7
64 bytes from 208.111.148.7: icmp_seq=0 ttl=44 time=86.473 ms
64 bytes from 208.111.148.7: icmp_seq=1 ttl=44 time=85.991 ms
64 bytes from 208.111.148.7: icmp_seq=2 ttl=44 time=86.000 ms
64 bytes from 208.111.148.7: icmp_seq=3 ttl=44 time=86.002 ms
64 bytes from 208.111.148.7: icmp_seq=4 ttl=44 time=85.668 ms
--- 208.111.148.7 ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 85.668/86.027/86.473/0.257 ms
YMMV but you get the idea.
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JL
Comcast |
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| As a sysadmin myself your dead on. Despite what people say, I stick with the ISP's DNS. I do use OpenDNS at work, but that's a commercial bonded multi-T1 connection. |
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 beerbumobscurum per obscuriusPremium
join:2000-05-06
Eastern PA | reply to jlivingood
I run my own DNS server, and it just so happens I get the same IP's (for netflix at least) as the Comcast servers - that is when the servers actually work..
C:\>nslookup
Default Server: UnKnown
Address: 192.168.1.5
> cdn.netflix.com
Server: UnKnown
Address: 192.168.1.5
Non-authoritative answer:
Name: netflix.vo.llnwd.net
Addresses: 208.111.160.6
208.111.161.254
Aliases: cdn.netflix.com
> server 68.87.64.146
Default Server: [68.87.64.146]
Address: 68.87.64.146
> cdn.netflix.com
Server: [68.87.64.146]
Address: 68.87.64.146
Non-authoritative answer:
Name: netflix.vo.llnwd.net
Addresses: 208.111.160.6
208.111.161.254
Aliases: cdn.netflix.com
> server 68.87.96.4
Default Server: phildns2.inflow.pa.bo.comcast.net
Address: 68.87.96.4
> cdn.netflix.com
Server: phildns2.inflow.pa.bo.comcast.net
Address: 68.87.96.4
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
*** Request to phildns2.inflow.pa.bo.comcast.net timed-out
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The good may die young, pricks live forever... |
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 ctg1701aVIP
join:2008-08-07
Philadelphia, PA
1 edit | 68.87.96.3 and 68.87.96.4 were decomissioned over a year ago. Please look at »dns.comcast.net for the most valid list of DNS for Comcast.
Thanks |
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beerbumobscurum per obscuriusPremium
join:2000-05-06
Eastern PA | said by ctg1701a:68.87.96.3 and 68.87.96.4 were decomissioned over a year ago. Please look at » dns.comcast.net for the most valid list of DNS for Comcast. Thanks then why are they still showing up when using dhcp? this is why I started running my own DNS, the servers issued by dhcp did not work.
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The good may die young, pricks live forever... |
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ctg1701aVIP
join:2008-08-07
Philadelphia, PA | said by beerbum:said by ctg1701a:68.87.96.3 and 68.87.96.4 were decomissioned over a year ago. Please look at » dns.comcast.net for the most valid list of DNS for Comcast. Thanks then why are they still showing up when using dhcp? this is why I started running my own DNS, the servers issued by dhcp did not work. No DHCP server should be handing those addresses out. Can you PM me with the DHCP server you are getting these from and what IP space you are getting so I can look at the subnet settings?
Thanks
Thanks |
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