Network lab with QEMU
To experiment with network stuff, I was using UML-based network labs. Many alternatives exist, like GNS3, Netkit, Marionnet or Cloonix. All of them are great viable solutions but I still prefer to stick to my minimal home-made solution with UML virtual machines. Here is why: I didn’t want to use disk images. They take a lot of space and they have to be maintained. They also become cluttered, espec
VTI ã®ä¸èº«
2. VTI ã¨ã¯ï¼Ÿ • Virtual Tunnel Interface ã®ç•¥ã§ Vyatta ( Network OS | Core ) 6.5R1 ã‹ã‚‰å®Ÿè£…ã•ã‚ŒãŸä¸èº«ãŒæš—å·åŒ– ã•ã‚Œã‚‹ IP-IP tunnel ã®ã‚ˆã†ãªãƒ¢ãƒŽ 3. Beneï¬ts • They are capable of having trafï¬c routed to them • They are capable of passing routing protocols over them • They do not require local or remote subnets to be speciï¬ed • They operate as if the peer interfaces are directly connected （Vyatta VPN Reference Guide 6.5R1 v01 より
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EVPN – the basics
So I decided to take a deep dive into eVPN, I’ll mostly be looking into VLAN-aware bundling, as per RFC 7432 – and mostly because I think this will fit more closely, with the types of deployments most of the customers are used to – good old IRB interfaces and bridge-tables! As everyone knows, VPLS has been available for many years now and it’s pretty widely deployed, most of the customers I see ha
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IHANet meeting 14 @åå¤å±‹ (2016/01/23 13:00〜)
JANOG37 meeting(åå¤å±‹)ã®ç¿Œæ—¥ã€1/23(土)ã«åå¤å±‹ã«ã¦ä¸€å ‚ã«ä¼šã—ã€ãƒ“アリングãªã©IHANetçš„ãªæ´»å‹•ã‚’ã™ã‚‹ã‚¤ãƒ™ãƒ³ãƒˆã§ã™ã€‚1/23(土)～24(æ—¥)ã¾ã§ã€åˆå®¿å½¢å¼ã§é–‹å‚¬ã—ã¾ã™ã€‚ 次ã®ã‚ˆã†ãªæ–¹ã«ãŠã™ã™ã‚ã§ã™ã€‚IHANetã«èˆˆå‘³ãŒã‚ã‚‹æ–¹ãªã‚‰ã€ã©ãªãŸã§ã‚‚å‚åŠ ã‚¦ã‚§ãƒ«ã‚«ãƒ ã§ã™ã€‚ BGP4çš„ãªéŠã³ã‚„ã€IHANetã«èˆˆå‘³ã¯ã‚ã‚‹ãŒã€ã©ã®ã‚ˆã†ã«ã™ã‚Œã°ã‚ˆã„ã‹ã‚ˆãã‚ã‹ã‚‰ãªã„ RPKIã§éŠã‚“ã§ã¿ãŸã„æ°—ãŒã™ã‚‹ æ¥å‹™ãªã©ã§æ™®æ®µã‹ã‚‰ã‚ªãƒšãƒ¬ãƒ¼ã‚·ãƒ§ãƒ³ã¯ã—ã¦ã„ã‚‹ãŒã€ä½œæ¥æ‰‹é †æ›¸ã‚’書ãã®ã¯ã‚‚ã†ç–²ã‚ŒãŸã®ã§ã€ã‚³ãƒ³ã‚½ãƒ¼ãƒ«ã‚’ã„ããªã‚Šãƒã‚·ãƒã‚·å©ã„ã¦ãƒªã‚¢ãƒ«ã‚¿ã‚¤ãƒ ã§ãƒ”アを張ã£ã¦ã„ãã“ã¨ã§ã€æ—¥é ƒã®ã†ã•ã‚’晴らã—ãŸã„ æ°—ãŒã¤ãã¨è‡ªå®…ãŒãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æ©Ÿå™¨ã§åŸ‹ã‚å°½ãã•ã‚Œã¦ã„ãŸãŸã‚ã€æœ‰åŠ¹æ´»ç”¨ã—ãŸã„ ãªã‚“ã¨ãªãAS番å·ãŒã»ã—ã„æ°—ãŒã™ã‚‹ å˜ã«ãƒ“ールãŒé£²ã¿ãŸã„ or 肉を食ã„ãŸã„ ã¾ãŸã€äººæ•°ç¢ºå®šã®å¿…è¦ãŒã‚ã‚‹ã“ã¨ã‹ã‚‰ã€å¤§å¤‰æ€¥ã§ç”³ã—訳ã‚ã‚Šã¾ã›ã‚“ãŒã€
OpenStack Networking ã®ä»•çµ„ã¿ | GREE Engineering
ã“ã‚“ã«ã¡ã¯ã€ã‚¤ãƒ³ãƒ•ãƒ©æœ¬éƒ¨ã®å¤§å±±è£•æ³°ã§ã™ã€‚最近ã¯ãšã£ã¨ OpenStack ã®é‹ç”¨ã‚’ã‚„ã£ã¦ã„ã¾ã™ã€‚ 昨年㮠OpenStack Days ã§ã®ç™ºè¡¨ ã«ã‚‚ã‚ã‚‹ã¨ãŠã‚Šã€ã‚°ãƒªãƒ¼ã¯ä¸€æ˜¨å¹´ (2013) ã® 5 月ã‹ã‚‰å•†ç”¨ç’°å¢ƒã§ã® OpenStack ã®é‹ç”¨ã‚’開始ã—ã¦ã„ã¾ã™ãŒã€æœ€è¿‘社内システムã§ã‚‚ OpenStack ã®åˆ©ç”¨ã‚’開始ã—ã¾ã—ãŸã€‚ 普通ã¯ã€Œé †ç•ªãŒé€†ã˜ã‚ƒãªã„ã‹!?ã€ã¨æ€ã‚れるã¨ã“ã‚ã§ã™ãŒã€ãã“ã¯ãƒ™ãƒ³ãƒãƒ£ãƒ¼ãŸã‚‹æ‰€ä»¥ã§ã™ (ãŸã¶ã‚“) 。 ã¯ã˜ã‚㫠今ã§ã“ã OpenStack ã®é‹ç”¨ã«é–¢ã‚ã£ã¦ããŸã“ã¨ã§ã€åƒ…ã‹ãªãŒã‚‰çŸ¥è˜ã‚„経験ãŒè“„ç©ã—ã¦ãã¾ã—ãŸãŒã€åˆã‚㦠OpenStack ã«è§¦ã‚Š Neutron ã«ã¤ã„ã¦èª¿ã¹å§‹ã‚ãŸé ƒã€ç™»å ´ã—ãŸèƒŒæ™¯ã‚„æ´å²çš„経緯ã€APIã€æ©Ÿèƒ½ã‚„使ã„æ–¹ã«ã¤ã„ã¦ã„ã‚ã„ã‚ã¨æ›¸ã‹ã‚Œã¦ã„るページã¯ã„ãã¤ã‚‚ã‚ã‚Šã¾ã—ãŸãŒã€ã©ã‚Œã‚’èªã‚“ã§ã‚‚イマイãƒã‚ˆãã‚ã‹ã‚‰ãªã„ã¨ã„ã†ã“ã¨ãŒã‚ã‚Šã¾ã—ãŸã€‚ æらã Ope
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PowerPoint Presentation
IETF TRILL update ～ãªã‚“ã§ç‹¬è‡ªå®Ÿè£…ã°ã£ã‹ã§IETF TRILL ã¯ã•ã£ã±ã‚Šã“ãªã„ã®ã‹ï½ž ãƒŸãƒ‰ã‚¯ãƒ©ã‚¸ãƒ£ãƒ‘ãƒ³æ ªå¼ä¼šç¤¾ 高嶋隆一 2013å¹´4月19æ—¥ JANOG31.5 2 WHAT’S TRILL? TRANSPARENT INTERCONNECTION OF LOTS OF LINKS 3 コンセプト Algorhyme V2, by Ray Perlner from RFC6325 I hope that we shall one day see A graph more lovely than a tree. A graph to boost efficiency While still configuration-free. A network where RBridges can Route packets to their target LAN. The pat
インターãƒãƒƒãƒˆ10分講座：RFC5952 -IPv6アドレスã®æŽ¨å¥¨è¡¨è¨˜ - JPNIC
ニュースレターNo.46/2010å¹´11月発行 RFC5952-IPv6アドレスã®æŽ¨å¥¨è¡¨è¨˜ IPv6アドレス表記ã®æŸ”軟性ãŒèµ·ã“ã™å•é¡Œã¨RFC5952ã®è§£èª¬ 2010å¹´8月21æ—¥ã«IPv6関連ã®RFCã¨ã—ã¦ã€æ–°ãŸã«RFC5952※1ãŒç™ºè¡Œã•ã‚Œã¾ã—ãŸã€‚本コーナーã§ã¯ã€å‰åŠã§ã“ã®RFCã§è¨˜è¿°ã•ã‚Œã¦ã„ã‚‹IPv6アドレスã®æŽ¨å¥¨è¡¨è¨˜ã«ã¤ã„ã¦ã€åŸ·ç†è€…ã®ä¸€äººã§ã‚ã‚‹ï¼®ï¼¥ï¼£ã‚¢ã‚¯ã‚»ã‚¹ãƒ†ã‚¯ãƒ‹ã‚«æ ªå¼ä¼šç¤¾ã®å·å³¶æ£ä¼¸æ°ã«è§£èª¬ã—ã¦ã„ãŸã ãã¾ã™ã€‚ ã¾ãŸå¾ŒåŠã§ã¯ã€RFC5952ãŒã§ãã‚‹ã¾ã§ã®æµã‚Œã‚’ã€å…±è‘—者ã§ã‚るＮＥＣビッグãƒãƒ¼ãƒ–æ ªå¼ä¼šç¤¾ã®å·æ‘è–一æ°ã«æŒ¯ã‚Šè¿”ã£ã¦ã„ãŸã ãã€ä¸€ã¤ã®RFCãŒä¸–ã«å‡ºã‚‹ã¾ã§ã®èˆžå°è£ã‚’ã”紹介ã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ IPv4アドレス在庫枯渇をãã£ã‹ã‘ã¨ã—ã¦ã€ISPã‚’ã¯ã˜ã‚ã¨ã™ã‚‹å¤šãã®é€šä¿¡äº‹æ¥è€…ã«ã¦IPv6ã®å°Žå…¥ãŒé€²ã‚られã¦ã„ã¾ã™ã€‚ã—ã‹ã—ã€å…·ä½“çš„ãªæ¤œè¨Žã‚„サービス開発を進ã‚る上ã§ã€IPv6アドレスã®ãƒ†ã‚スト表記ãŒçµ±
Using BGP data to find Spammers
Using BGP data to find Spammers Posted by Andree Toonk - September 3, 2014 - Hijack - 4 Comments It’s long been assumed that Spammers use a technique called IP squatting to get around IP reputation lists and to make it harder to find the real source of the spammers. In this blog we’ll take a closer look at Spam operations and their techniques. IP Squatting We’ve all read the reports about IPv4 run
Darren's Blog - Google Engineer. Dual CCIE #38070. JNCIE-SP #2227
So I’m finally off to Cisco Live! This will be my first time there, and I’m hoping to meet and speak to a lot of people I speak to online. So far my timetable looks like so: Monday 11th July Troubleshooting BGP [BRKRSTÂ3320] ASRÂ9000/IOSÂXR Understanding forwarding, troubleshooting the system and XR operations [BRKSPGÂ2904] Introduction to Segment Routing [BRKRSTÂ2124] A Practical Introduction to
Differences between PVST and PVST+
BPDU transported over native VLAN untagged (cannot differentiate between different VLANs), therefore support natively only one single instance of STP for all VLAN, MST (Mono Spanning Tree). (-) Not interoperable and less flexible approach. (+) Improve the limitation of 802.1d STP (created before VLAN) by supporting one separate instance for each VLAN, using ISL trunk only. (-) Still not interopera
Product Catalog | HP®
diagnostic Message for Product Content Diagnostic Message for Accessories service Diagnostic Message for label service
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strongSwan KVM Tests
https://www.cisco.com/c/dam/global/en_ca/assets/plus/assets/pdf/FabricPath-RFULLER.pdf
https://www.cisco.com/c/dam/global/ja_jp/training-events/ciscoplus2011/pdf/2d-2.pdf
Enterprise QoS Solution Reference Network Design Guide - Cisco
Catalyst 4500 Series Switch Software Configuration Guide, 15.0(2)SG Configuration Guide - Configuring VRF [Cisco Catalyst 4500 Series Switches]
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