bgpgrep, peerindex: add page (#10276)

pages/common/bgpgrep.md

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

pages/common/peerindex.md

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+# peerindex
+
+> Inspect MRT TABLE_DUMPV2 Peer Index Table.
+> Can read files compressed with gzip, bzip2 and xz.
+> More information: <https://gitea.it/1414codeforge/ubgpsuite>.
+
+- Output all peers:
+
+`peerindex {{master6.mrt}}`
+
+- Display all peers that have provided routing information:
+
+`peerindex -r {{master6.mrt}}`