ccna vce

ccna vce

Interface fast1/0 This is a simple method of data offloading and path redundancy using the longest matching principle. !! Attention tunnel mode Ipv6 address 2001:0001::FFFF/64 Tunnel interfaces do not necessarily need ipv6 address ,ccna vce, of course, can also be configured v6 address, it does not affect traffic through the router configuration is complete, PC1 can ping through PC2 , Ethereal as follows: The IPv6 globally unique address 2002:84d6:010a:1::1 , the destination IP address is the IPv6 globally unique address of the PC2 2002:ce7b:1fc8:2::2 . This IPv6 packet is sent to the default gateway of PC1 , which is the router A. . Set ip next-hop verify-availability based on object tracking Exit Segment header Fragment Header (Protocol 44 ) lab environment The configuration of R3 is as follows: 2002: ce7b:1fc8:1::1 performs a recursive lookup of the routing table and finds that it is to be thrown out from the tunnel1 interface, so that the original IPv6 data is pressed onto the new IPv4 tunnel header, and the source address is the IPv4 source address of the tunnel 132.214. 1.10 , the destination address is 206.123.31.200 . This packet is just like R2 . Tunnel adapter isatap.{0DB7233C-89B7-49DB-A8C0-D1AA005F4E6A}: IP routing troubleshooting 9.9.23.0 is directly connected, FastEthernet0/0 Cisco Express Forwarding IP policy routing is disabled Ip route 172.16.1.0 255.255.255.224 192.168.23.3 !! Press the longest match, go this one No auto-summary no synchronization exit-address-family Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP U - Per-user Static route 9.9.12.0 is directly connected, FastEthernet0/0 Interface Tunnel1 2012::2 Mpls ldp router-id Loopback0 mpls label range 400 499 Image 6 In the Probe state, every unicast NS is sent every RetransTime ( r default 1S ) , and MAX_Unicast_Solicit is sent before waiting for RetransTimer . Note that at this time, the routing table is used to recursively find the route to 10.1.12.2 , so there must be reachable routes in the routing table. Domain name system Garbage colletion/flush timer Image Static route After being injected into EIGRP , the tag is still carried. Image 1 : node local range; single interface is valid, only for Loopback communication R1 and R2 run RIP ; R2 and R3 establish OSPF neighbor relationships. In the initialization case, there are four entries in the routing table of R2 , as shown in the figure above, and there are only two entries in the routing table of R1 , that is, two direct links. So now, we do the re-release action on R2 , and redistribute the OSPF route to RIP , then the configuration is as follows: Other uses When ISP1 is down, and the interface of GW connected to ISP1 is DOWN , the data of PC accessing 100 network is switched to ISP2. FastEthernet0/0 [up/up] IHL header length; ! Look at the picture above: Routers A and B are two sites. Both sides apply for an IPv4 public network address, and use this public network IPv4 address to map to obtain the world's only 6to4 IPv6 address. This 6to4 IPv6 address /48 bit has a very large space and is used for IPv6 users in the site . Thus, when the site A in the IPv6 user accessing the site B in IPv6 user, IPv6 packet to A , then A according to the IPv6 destination data header IPv6 address, to obtain a corresponding IPv4 global the IP , then it will original The IPv6 packet is encapsulated, the IPv4 header of the 6to4 tunnel is placed, and then the packet is placed.IPv4 network routing, until reaching B .