1,757 reputation
815
bio website perlmonkey.blogspot.com
location United Kingdom
age 39
visits member for 5 years, 1 month
seen 2 days ago

I have been working as a Network Engineer and Systems Administrator in ISP/Telecommunications networks since 1996. I have extensive experience the BGP, OSPF, MPLS, IPv6, VoIP, ATM, DSL, QoS and many other TLAs.

I am married with a son and three dogs. I enjoy skateboarding, cycling, reading, music and pondering on the future of networking.


Jul
6
comment What is the Maximum MTU supported in DSL Standards
Pretty much any incumbent telecoms company will do this, e.g. British Telecom, Deutsche Telecom, France Telecom. The delivery mechanism varies and can include direct connection to an end-to-end ATM PVC, or a dedicated IP port delivering PPP over L2TP (often over ethernet with an MTU in the 2k-9k range).
Jul
6
revised What is the Maximum MTU supported in DSL Standards
edited tags
Jul
6
comment What is the Maximum MTU supported in DSL Standards
I know that sending packets of more than 1500 bytes across the public internet is uncommon; however I use a lot of DSL lines in VPN deployments which go nowhere near the public internet and am curious as to why the MTU is still restricted in this situation.
Jul
6
asked What is the Maximum MTU supported in DSL Standards
May
30
awarded  Yearling
Apr
1
comment Are there any statistics on the number of networks using Ethernet Jumbo frames?
A lot of people have posted comments on situation where they use Jumbos locally but not on the WAN. Can anyone comment on this: Would you consider a WAN ethernet link to be broken if it only allowed for a 1500 byte MTU? It seems the consensus so far is no.
Feb
25
asked Are there any statistics on the number of networks using Ethernet Jumbo frames?
Dec
10
accepted How well does Windows 7 Handle High Bandwidth-Delay Product Networks
Dec
8
comment Why am I getting long TCP connect latency on connect in a LAN (over a cross!)?
The problem with comparing time deltas is that it's impossible to tell whether there is a big delay in one direction, or whether there is a smaller delay in both directions :(
Dec
8
answered Why am I getting long TCP connect latency on connect in a LAN (over a cross!)?
Dec
7
answered Local DNS doesn't work over Wireless
Dec
7
comment DNS using CNAMEs breaks MX records?
This is a common question and has been asked many times before. See this link for an example: serverfault.com/questions/18000/…
Dec
7
revised Why does psql attempt to connect with a different username when run from a Perl script
added 158 characters in body
Dec
7
comment Why does psql attempt to connect with a different username when run from a Perl script
Do you have anything set in the PG* environment variables or a ~/.psqlrc file? Are there any map entries in the pg_ident.conf file?
Dec
7
answered Why does psql attempt to connect with a different username when run from a Perl script
Dec
7
revised what does a cname record do?
edited tags
Dec
7
answered How well does Windows 7 Handle High Bandwidth-Delay Product Networks
Dec
7
asked How well does Windows 7 Handle High Bandwidth-Delay Product Networks
Aug
3
comment How to delete all hidden files and directories using Bash?
Be careful with that shorter version, it will give similar, but not identical results. It won't match names with two dots at the front (e.g. ".../" which is sometimes seen hiding rootkits, etc.)
Aug
1
awarded  Nice Answer