Update cheatsheets

bgpgrep

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# bgpgrep
+
+> Filter and print BGP data within MRT dumps.
+> Can read files compressed with `gzip`, `bzip2` and `xz`.
+> More information: <https://codeberg.org/1414codeforge/ubgpsuite>.
+
+- List all routes:
+
+`bgpgrep {{master6.mrt}}`
+
+- List routes received from a specific peer, determined by the peer's AS number:
+
+`bgpgrep {{master4.mrt}} -peer {{64498}}`
+
+- List routes received from a specific peer, determined by the peer's IP address:
+
+`bgpgrep {{master4.mrt.bz2}} -peer {{2001:db8:dead:cafe:acd::19e}}`
+
+- List routes which have certain ASNs in their AS path:
+
+`bgpgrep {{master6.mrt.bz2}} -aspath '{{64498 64510}}'`
+
+- List routes that lead to a specific address:
+
+`bgpgrep {{master6.mrt.bz2}} -supernet '{{2001:db8:dead:cafe:aef::5}}'`
+
+- List routes that have communities from a specific AS:
+
+`bgpgrep {{master4.mrt}} -communities \( '{{64497}}:*' \)`