BGP 101
whois $(curl ifconfig.me/ip)
% Information related to '90.76.0.0/16AS3215'
route: 90.76.0.0/16
descr: France Telecom IP2000-ADSL-BAS
origin: AS3215 # ✳
mnt-by: FT-BRX
created: 2018-08-16T14:22:19Z
last-modified: 2018-08-16T14:22:19Z
source: RIPE
AS3215 is my ISP’s autonomous system.
% sudo mtr google.fr
My traceroute [v0.93]
macbook-pro-de-mael-2.home (2a01:cb19:86a2:8c00:20db:756d:83b3:8891) 2020-04-19T17:55:26+0200
Keys: Help Display mode Restart statistics Order of fields quit
Packets Pings
Host Loss% Snt Last Avg Best Wrst StDev
1. livebox.home 0.0% 69 5.6 41.7 3.2 700.4 128.3
2. 2a01cb08a00402190193025300740181.ipv6.abo.wanadoo.fr 0.0% 69 18.5 61.2 9.8 1012. 158.1
3. 2a01:cfc4:0:d00::a 0.0% 69 42.9 55.9 16.5 957.9 137.9
4. bundle-ether103.pastr4.-.opentransit.net 76.5% 69 31.8 33.3 23.3 60.9 11.5
5. et-15-0-2-0.pastr3.-.opentransit.net 0.0% 69 59.6 70.8 23.4 1050. 153.0
6. 2001:4860:1:1::336 0.0% 69 41.0 67.6 23.6 943.7 133.7
7. 2001:4860:0:1017::1 49.3% 69 29.9 77.2 25.3 1046. 185.7
8. 2001:4860:0:1::1e3b 0.0% 68 34.5 80.7 23.0 952.3 179.7
9. par10s29-in-x03.1e100.net 0.0% 68 29.1 72.1 23.7 836.8 154.7
% subnetcalc 80.10.236.253/26
Address = 80.10.236.253
01010000 . 00001010 . 11101100 . 11111101
Network = 80.10.236.192 / 26
Netmask = 255.255.255.192
Broadcast = 80.10.236.255
Wildcard Mask = 0.0.0.63
Hosts Bits = 6
Max. Hosts = 62 (2^6 - 2)
Host Range = { 80.10.236.193 - 80.10.236.254 }
Properties =
- 80.10.236.253 is a HOST address in 80.10.236.192/26
- Class A
DNS Hostname = (nodename nor servname provided, or not known)
% nc route-server.opentransit.net 23
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
route-server.opentransit.net -- & Opentransit
IPv4/IPv6 views
This router keeps peering sessions with all the Opentransit Backbone Routers,
throughout the Opentransit IP Backbone as follows:
[IPv4/IPv6 view]
IPv4: 193.251.245.1 IPv6: 2001:688:0:1::158 Dallas
IPv4: 193.251.245.3 IPv6: 2001:688:0:1::1c Los Angeles
IPv4: 193.251.245.7 IPv6: 2001:688:0:1::55 London
IPV4: 193.251.245.9 IPv6: 2001:688:0:1::41 Palo Alto
IPv4: 193.251.245.10 IPv6: 2001:688:0:1::4e Paris
IPv4: 193.251.245.16 IPv6: 2001:688:0:1::168 New York
IPv4: 193.251.245.19 IPv6: 2001:688:0:1::4b Barcelona
IPv4: 193.251.245.28 IPv6: 2001:688:0:1::8 Frankfurt
IPv4: 193.251.245.37 IPv6: 2001:688:0:1:: Frankfurt
IPv4: 193.251.245.49 IPv6: 2001:688:0:1::19 London
IPv4: 193.251.245.53 IPv6: 2001:688:0:1::1e Chicago
IPv4: 193.251.245.57 IPv6: 2001:688:0:1::45 Miami
IPv4: 193.251.245.66 IPv6: 2001:688:0:1::44 Geneva
IPV4: 193.251.245.69 IPV6: 2001:688:0:1::56 Singapore
IPv4: 193.251.245.76 IPv6: 2001:688:0:1::d New York
IPv4: 193.251.245.78 IPv6: 2001:688:0:1::22 Madrid
IPv4: 193.251.245.81 IPv6: 2001:688:0:1::4 Barcelona
IPv4: 193.251.245.88 IPv6: 2001:688:0:1::f London
IPv4: 193.251.254.92 IPv6: 2001:688:0:1::24 Paris
IPv4: 193.251.245.96 IPv6: 2001:688:0:1::3E Brussels
IPv4: 193.251.245.134 IPv6: 2001:688:0:1::4a Zurich
IPv4: 193.251.245.147 IPv6: 2001:688:0:1::2A HongKong
IPv4: 193.251.245.163 IPv6: 2001:688:0:1::18 New York
IPv4: 193.251.245.170 IPv6: 2001:688:0:1::2f Madrid
IPv4: 193.251.245.181 IPv6: 2001:688:0:1::3C Singapore
IPv4: 193.251.245.196 IPv6: 2001:688:0:1::57 Frankfurt
IPv4: 193.251.245.216 IPv6: 2001:688:0:1::16 Miami
IPv4: 193.251.245.251 IPv6: 2001:688:0:1::30 Amsterdam
IPv4: 193.251.245.252 IPv6: 2001:688:0:1::12 Ashburn
For questions about this route-server, send email to: opentransit.iptac@orange.com
*** Log in with username 'rviews', password 'Rviews' ***
User Access Verification
Username: rviews
rviews
Password: Rviews
OAKRS1#show ?
show ?
banner Display banner information
bgp BGP information
bootflash: display information about bootflash: file system
flash: display information about flash: file system
ip IP information
ipv6 IPv6 information
webui: display information about webui: file system
<cr> <cr>
OAKRS1#show
% Type "show ?" for a list of subcommands
OAKRS1#show bgp
show bgp
% Command accepted but obsolete, unreleased or unsupported; see documentation.
BGP table version is 183946817, local router ID is 204.59.3.38
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
t secondary path, L long-lived-stale,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
r>i 0.0.0.0 193.251.245.7 100 0 i
r i 193.251.245.252 100 0 i
* i 1.0.0.0/24 4.68.70.169 100 85 0 3356 13335 i
* i 195.219.87.114 100 85 0 6453 13335 i
* i 4.68.63.97 100 85 0 3356 13335 i
* i 4.68.73.97 100 85 0 3356 13335 i
* i 193.251.249.46 100 85 0 2914 13335 i
* i 4.68.127.233 100 85 0 3356 13335 i
* i 129.250.66.141 100 85 0 2914 13335 i
* i 193.251.247.156 100 85 0 2914 13335 i
* i 4.68.70.173 100 85 0 3356 13335 i
* i 66.198.127.81 100 85 0 6453 13335 i
* i 4.68.73.153 100 85 0 3356 13335 i