If like me you want to give some new energies to your macbook and install some memory and a new SSD hard drive. Be ware of this : you Crucial SSD must be initialized before install El Capitan on it.
I have tested my drive, connectics, … and finally found this URL pointer : http://forum.crucial.com/t5/Crucial-SSDs/How-to-initialize-your-SSD-Mac/ta-p/111490
We will dive into IPv6 prefix delegation prefix.
First of all, we will make a real simple topology :
R1 acts as a DHCP server and use the prefix delegation feature. But how it works ? How it is configured ?
R1 :
ipv6 unicast-routing ipv6 cef ipv6 dhcp pool POOLv6 prefix-delegation pool p lifetime 180 120 domain-name lucas.fr.eu.org ipv6 local pool p 2001:DB8::/40 48 interface FastEthernet0/0 ip address 10.0.0.1 255.255.255.0 duplex half ipv6 address 2A02::1/48 ipv6 enable ipv6 dhcp server POOLv6 R1# show ipv6 dhcp interface FastEthernet0/0 is in server mode Using pool: POOLv6 Preference value: 0 Hint from client: ignored Rapid-Commit: disabled R1#
R2 :
interface FastEthernet0/0
duplex half
ipv6 address autoconfig default
ipv6 enable
ipv6 dhcp client pd prefix-from-provider
interface FastEthernet1/1
no ip address
duplex auto
speed auto
ipv6 address prefix-from-provider ::1:0:0:0:1/64
ipv6 enable
R2#show ipv6 dhcp interface
FastEthernet0/0 is in client mode
Prefix State is OPEN
Renew will be sent in 00:00:04
Address State is IDLE
List of known servers:
Reachable via address: FE80::C805:ADFF:FE80:0
DUID: 00030001CA05AD800000
Preference: 0
Configuration parameters:
IA PD: IA ID 0x00040001, T1 60, T2 120
Prefix: 2001:DB8::/48
preferred lifetime 120, valid lifetime 180
expires at May 03 2016 10:53 PM (125 seconds)
Domain name: lucas.fr.eu.org
Information refresh time: 0
Prefix name: prefix-from-provider
Prefix Rapid-Commit: disabled
Address Rapid-Commit: disabled
R2#
Debug trace on R2 (debug ipv6 dhcp) :
*May 3 22:36:11.859: IPv6 DHCP: Sending RENEW to FF02::1:2 on FastEthernet0/0 *May 3 22:36:11.859: IPv6 DHCP: DHCPv6 changes state from OPEN to RENEW (TIMEOUT) on FastEthernet0/0 *May 3 22:36:11.879: IPv6 DHCP: Received REPLY from FE80::C805:ADFF:FE80:0 on FastEthernet0/0 *May 3 22:36:11.879: IPv6 DHCP: Processing options *May 3 22:36:11.879: IPv6 DHCP: Adding prefix 2001:DB8::/48 to prefix-from-provider *May 3 22:36:11.883: IPv6 DHCP: T1 set to expire in 60 seconds *May 3 22:36:11.883: IPv6 DHCP: T2 set to expire in 120 seconds *May 3 22:36:11.883: IPv6 DHCP: DHCPv6 changes state from RENEW to OPEN (REPLY_RECEIVED) on FastEthernet0/0
We have acquired the prefix via PD aka Prefix Delegation feature :
R2#show ipv6 general-prefix IPv6 Prefix prefix-from-provider, acquired via DHCP PD 2001:DB8::/48 Valid lifetime 158, preferred lifetime 98 FastEthernet1/1 (Address command) R2#
On R3 or R4 :
interface FastEthernet0/0
no ip address
duplex half
ipv6 address autoconfig default
ipv6 enable
end
2#show ipv6 dhcp interface
FastEthernet0/0 is in client mode
Prefix State is OPEN
Renew will be sent in 00:00:04
Address State is IDLE
List of known servers:
Reachable via address: FE80::C805:ADFF:FE80:0
DUID: 00030001CA05AD800000
Preference: 0
Configuration parameters:
IA PD: IA ID 0x00040001, T1 60, T2 120
Prefix: 2001:DB8::/48
preferred lifetime 120, valid lifetime 180
expires at May 03 2016 10:53 PM (125 seconds)
Domain name: lucas.fr.eu.org
Information refresh time: 0
Prefix name: prefix-from-provider
Prefix Rapid-Commit: disabled
Address Rapid-Commit: disabled
R2#
If we debug we will see (debug ipv6 interface, debug ipv6 dhcp, debug ipv6 nd) :
May 3 22:05:01.335: ICMPv6-ND: Neighbour FE80::C806:ADFF:FE81:1D on FastEthernet0/0 : LLA ca06.ad81.001d *May 3 22:05:01.335: ICMPv6-ND: INCMP -> STALE: FE80::C806:ADFF:FE81:1D *May 3 22:05:01.335: IPv6-Address: intfid_algo is notactive on intf 4 *May 3 22:05:01.339: IPv6-Address: intfid_algo is active on intf 4 *May 3 22:05:01.339: IPv6-Address: Generating IntfID rc 0, prefix: 2001:DB8:0:1::/64, address 2001:DB8:0:1:C808:ADFF:FE85:0 *May 3 22:05:01.343: IPv6-Address: Prefix Information change for 2001:DB8:0:1::/64, 0x0 -> 0x1E0 *May 3 22:05:01.343: IPv6-Address: Adding prefix 2001:DB8:0:1::/64 to FastEthernet0/0 *May 3 22:05:01.343: IPv6-Address: Adding operating owner prefix configured on FastEthernet0/0 *May 3 22:05:01.347: IPv6-Address: Adding operating owner address configured on FastEthernet0/0 *May 3 22:05:01.347: IPv6-Address: Address 2001:DB8:0:1:C808:ADFF:FE85:0 configured on FastEthernet0/0 *May 3 22:05:01.347: IPv6-Addrmgr- R4(config-if)#ND: DAD request for 2001:DB8:0:1:C808:ADFF:FE85:0 on FastEthernet0/0 *May 3 22:05:01.347: ICMPv6-ND: Sending NS for 2001:DB8:0:1:C808:ADFF:FE85:0 on FastEthernet0/0 *May 3 22:05:01.351: ICMPv6-ND: Autoconfiguring 2001:DB8:0:1:C808:ADFF:FE85:0 on FastEthernet0/0 *May 3 22:05:02.351: IPv6-Addrmgr-ND: DAD: 2001:DB8:0:1:C808:ADFF:FE85:0 is unique. *May 3 22:05:02.351: ICMPv6-ND: Sending NA for 2001:DB8:0:1:C808:ADFF:FE85:0 on FastEthernet0/0 *May 3 22:05:02.355: IPv6-Address: Address 2001:DB8:0:1:C808:ADFF:FE85:0/64 is up on FastEthernet0/0
Finally, we are able to ping the DHCPv6 server :
R4#ping ipv6 2A02::1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 2A02::1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 32/45/96 ms R4#traceroute 2A02::1 Type escape sequence to abort. Tracing the route to 2A02::1 1 2001:DB8:0:1::1 12 msec 36 msec 12 msec 2 2A02::1 8 msec 56 msec 36 msec R4#
IP SLA is a great tool to automation some treatment. You could do great things with it. We will work on IP SLA Reaction here.
What is it ? You could launch some action on some state of an IP SLA. Such as (Even if it is not a good example) : some nested ping.
The job here, is to check R4 – R3 and R4 – R2 if IP SLA beetween R1 – R4 is awful.
We could do this such as :
R4 :
ip sla 1 udp-jitter 10.1.12.1 3200 source-ip 10.1.43.4 source-port 6565 codec g711ulaw codec-size 128 frequency 5 ip sla schedule 1 start now life forever ip sla 43 icmp-echo 10.1.43.3 source-ip 10.1.43.4 frequency 5 ip sla schedule 43 start pending life 60 ip sla 42 icmp-echo 10.1.32.2 source-ip 10.1.43.4 frequency 5 ip sla schedule 42 start pending life 60 ip sla reaction-trigger 1 43 ip sla reaction-trigger 43 42 ip sla reaction-configuration 1 react MOS threshold-type consecutive 4 threshold-value 390 220 action-type trapAndTrigger ip sla reaction-configuration 43 react rtt threshold-value 100 50 threshold-type immediate action-type trapAndTrigger ip sla reaction-configuration 42 react rtt threshold-value 100 50 threshold-type immediate action-type trapOnly snmp-server host 10.1.1.1 snmp-server enable traps syslog
We do an analyze on each segment of path and if it fails on our condition, it traps it.
Obvisouly on R1 :
ip sla responder
I don’t know if it will really help someone but you can download here my CCIE planner spreadsheet : CCIE_Planner
It will provide you :
It is provided as is and under GPLv2.
Have fun with your studies.
Sorry, but this time it will be a french article.
Ce qu’il faut que la France reste :
J'ai les méninges nomades J'ai le miroir maussade Tantôt mobile Tantôt tranquille Je moissonne sans bousculade Je dis Aime Et je le sème Sur ma planète Je dis M Comme un emblème La haine je la jette Je dis AIME, AIME, AIME Du Sphinx dans mon rimeur Paris au fil du cur Du Nil dans mes veines Dans mes artères coule la Seine Je dis Aime Et je le sème Sur ma planète Je dis M Comme un emblème La haine je la jette Je dis AIME, AIME, AIME Pour le dehors le dedans Pour l'après pour l'avant Je dis Aime Et je le sème Sur ma planète Je dis M Comme un emblème La haine je la jette Je dis AIME, AIME, AIME
Désolé pour les lecteurs anglophones, cela sera un article pour une fois en français et loin des sphères concernant Cisco et la certification CCIE.
“Les grandes grandes vacances” est un dessin animé réalisé par la maison de production “Les armateurs“.
Cette série animée traite de la seconde guerre mondiale et de la résistance française. Le fait que les évènements se passent près de Dieppe en Normandie, rajoute à mon intérêt.
Je suis tombé dessus avec mes enfants. Ils sont encore petits et ne comprennent pas tout ce qu’implique ce dessin animé. Mais ce dernier est vraiment de qualité et permet je l’espère aux enfants d’aujourd’hui de comprendre l’époque évoqué, soit la seconde guerre mondiale, la résistance, et la liberté.
Cette époque résonne particulièrement en moi et je voulais partager cet extraordinaire travail et j’espère que ce dessin animé sera utilisé afin d’éduquer nos enfants et donc que cette période de notre histoire reste toujours ancré en nous. Ceci est nécessaire. Vu l’époque difficile où la nous vivons, cette piqure de rappel est vraiment importante.
Thank you He.net to have send my IPv6 Sage certified T-Shirt.
I really like it. Great quality and thank you to make all of you’ve done for v6 🙂
During these holidays on this beginning of may has been used for work at home and in our garden. Nevertheless, some work has been done on OSPF during these last two weeks. CCIE studies has been indeed slower than in April. It will be at 100% in beginning of the next week.
I have found again this networking game. The first time I play with it was in 2009. It was fun to take some hours to play with it.
It is not hosted by Cisco, so if you want to retrieve the archive you can download it here for those of you that were not in this industry or not know this cisco networking game.
It was mexican party with buritos and three milks cake…