I have a file that looks something like this:

 ip vrf forwarding ABC:Defgh
 ip address 1.1.1.1 255.255.255.252
 ip vrf forwarding ABD: Efghi
 ip address 2.2.2.2 255.255.255.252
[download]

what I'm trying to do is find each line that begins with 'ip address' and copy it directly below, so it looks like this:

 ip vrf forwarding ABC:Defgh
 ip address 1.1.1.1 255.255.255.252
 ip address 1.1.1.1 255.255.255.252
 ip vrf forwarding ABD: Efghi
 ip address 2.2.2.2 255.255.255.252
 ip address 2.2.2.2 255.255.255.252
[download]

I've been searching the web over, but all everybody wants to do is get rid of duplicates. Any ideas? And no, this is not homework, this is a script I'm trying to write to run in our network...I hav the rest of it done, but can't seem to be able to duplicate those lines. Any help is greatly appreciated.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.