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network cisco ccna gns3 certification arteq

network cisco ccna gns3 certification arteq
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Showing posts with label cisco. Show all posts
Showing posts with label cisco. Show all posts

Friday, January 25, 2013

radix tree redux...

i forgot to remember that i passed the 800 post marker this morning...

i noticed some of you looking at this old post about radix trees...

http://insearchofthecert.blogspot.com/2012/09/radix-tree.html

when i bumped into mtrie the other day digging into cef i thought of resurrecting it, but then went onto something else...

however:
http://www.google.com/patents/US7149216

a trie data structure is used to map a multicast packet header by a sequence of nodes that match on destination address or source address.

or

A device for switching packets at high speed. For each packet, the A device matches packet data with protocols, to determine how to switch the packet.

Inventor: David R. Cheriton
Original Assignee: Cisco Technology, Inc. 


cisco has quite a storied history of patents with this...

and yet another book i should read one day:
http://books.google.com/books?id=IDmpiQd5FwwC&pg=PA60&lpg=PA60&dq=mtrie+cisco&source=bl&ots=q6uuTZMdWE&sig=RrpCrfEfMZJOmPcO8CiQKFAQwCQ&hl=en&sa=X&ei=VHICUYvFL6LC0QG4-4C4BQ&ved=0CEMQ6AEwAQ#v=onepage&q=mtrie%20cisco&f=false



Friday, October 12, 2012

junos and eigrp...

just as i thought...

an eigrp enterprise does not necessarily have to migrate to opsf to include juniper in a cisco environment... as i surmised in the last post, just set up an ospf interface on the eigrp router, connect that to the juniper equipment and redistribute on the cisco side...


r1#sh ip route eigrp

Gateway of last resort is not set

      1.0.0.0/24 is subnetted, 1 subnets
D        1.1.1.0 [90/156160] via 10.1.1.2, 01:07:49, FastEthernet1/0
      2.0.0.0/24 is subnetted, 1 subnets
D        2.2.2.0 [90/156160] via 10.1.1.2, 01:07:49, FastEthernet1/0

r1#sh ip eigrp neigh
EIGRP-IPv4 Neighbors for AS(1)
H   Address                 Interface              Hold Uptime   SRTT   RTO  Q  Seq
                                                   (sec)         (ms)       Cnt Num
0   10.1.1.2                Fa1/0                    13 01:07:58  236  1416  0  4

r1 is connected to eigrp 1 on r2...  i set up f1/1 on r1 to connect to a juniper router to bridge the gap, and redistributed eigrp into ospf, and vice versa...

root@junos1> show route

inet.0: 3 destinations, 3 routes (3 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.1.0/24     *[Direct/0] 00:58:53
                    > via em0.0
192.168.1.2/32     *[Local/0] 00:58:53
                      Local via em0.0
224.0.0.5/32       *[OSPF/10] 00:51:44, metric 1
                      MultiRecv

after two way redistribution on the cisco side...

router eigrp 1
 network 10.1.1.0 0.0.0.255
 redistribute ospf 1 metric 1 0 1 1 1500
!
router ospf 1
 redistribute eigrp 1 subnets
 network 192.168.1.0 0.0.0.255 area 0

we have...

r2#sh ip route eigrp

Gateway of last resort is not set

D EX  192.168.1.0/24 [170/2560002560] via 10.1.1.1, 00:01:35, FastEthernet1/0

root@junos1> show route

inet.0: 6 destinations, 6 routes (6 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

1.1.1.0/24         *[OSPF/150] 00:02:06, metric 20, tag 0
                    > to 192.168.1.1 via em0.0
2.2.2.0/24         *[OSPF/150] 00:02:06, metric 20, tag 0
                    > to 192.168.1.1 via em0.0
10.1.1.0/24        *[OSPF/150] 00:02:06, metric 20, tag 0
                    > to 192.168.1.1 via em0.0
192.168.1.0/24     *[Direct/0] 01:02:59
                    > via em0.0
192.168.1.2/32     *[Local/0] 01:02:59
                      Local via em0.0
224.0.0.5/32       *[OSPF/10] 00:55:50, metric 1
                      MultiRecv

root@junos1> ping 2.2.2.2
PING 2.2.2.2 (2.2.2.2): 56 data bytes
64 bytes from 2.2.2.2: icmp_seq=0 ttl=254 time=57.377 ms
64 bytes from 2.2.2.2: icmp_seq=1 ttl=254 time=62.538 ms
64 bytes from 2.2.2.2: icmp_seq=2 ttl=254 time=63.248 ms
^C
--- 2.2.2.2 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev = 57.377/61.054/63.248/2.616 ms

no problem... as expected... like peas and carrots...


Sunday, April 8, 2012

ppdioo...

ppdioo...   oooooooooooooooooooohhhhhhhhhhhhh


prepare- determine network requirements, network strategy, and conceptualize network architecture


      what conceptualize?

to make an idea of; a concept of...

plan-  compare the network as is to the proposed amendments. identify tasks, responsibilities, milestones and resources

design- create a detailed design



        
implement- without disturbing the current network, integrate equipment to achieve the design

 
 implement: to put into effect

operate- everyday network operations; responses to issues that arise

optimize- get feedback from operations in order to make necessary adjustments

pp- whaaaaaaaaaaaat...