ccna v3 dumps free download pdf

ccna v3 dumps free download pdf

R2 re-advertises the A route, then according to the preemptive rule, R3 will ignore the R1 update about the A route. At the same time, due to the deployment of two-way re-release, R3 will further re-publish the learned A- route back to process 1 . R2(config)# router eigrp 100 Default route delivery Experimental example: Calling in the distribution list V The router uses the ICMPv6 redirect message ( ICMP TYPE 137 ) to inform the nodes on the link that there is a better router for forwarding packets on the link. The node that receives this ICMPv6 redirect message can modify its local routing table based on the new router address in the redirect message. Basically up from the mechanism with IPv4 in ICMP redirect no different. 1 command) only sends and receives v1 messages, v2 only sends and receives v2 messages by default . Ipv6 address 2001:23::3/64 interface Serial0/1 Where the State if REACH represents a neighbor up; as STALE means that these neighbors in the last 30s inside is not reachable Source starts to send IPv6 packets using MTU=1400 ,ccna v3 dumps free download pdf, and the packet arrives at B. Unassigned Ipv6 unicast-routing R3 entry: Router(config)# router ospf 1 In the figure above, we started the re-release action on R2 . We "inject" the OSPF route into the RIP process, so that When the GW connects to the outgoing interface of ISP2 and DOWN (that is, ISP2 hangs), then switch to ip next-hop recursive, which is ISP2. Image The IPv4 and IPv6 address plans are as shown in the figure above. RIPng Match x4 set Y Increase flow label System Id Precautions 6to4 automatic tunnel configuration Virtual-Template Virtual Template interface Virtual-TokenRing Virtual TokenRing None FF02::1:FFxx:xxxx where xx:xxxx is the lower 24 bits of each unicast or anycast address Image 192.168.1.0/24 Image 6PE : 6PE technology relies on BGP , BGP 's Peer is the need to manually specify, it can be regarded as a semi-automatic tunneling technology. Router ospf 100 !! This IPv4 address is the destination address of the ISATAP tunnel ! IPv4 When the host communicates with other IPv6 hosts, it forwards from the tunnel interface and takes the IPv4 address from the next hop IPv6 address of the packet as the destination address of the IPv4 encapsulation. If the destination host is in the site, the next hop is the destination host itself. If the destination host is not in the site, the next hop is the address of the ISATAP router. Image Ipv6 unicast-routing interface fastEthernet 0/0 !! 4.4.4.4 is also PE2 Ipv6 address FE80::FFFF:FE10:3 link-local ipv6 router isis Ipv6 enable interface Serial0/1 ! CEF form Image RFC1723 defines an acceptance control switch 100 Ipv6 ospf 1 area 0 For example, the public network address of R1 is: 202.101.12.1 , then the corresponding 6to4 address space is: 2002:CA65:0C01::/48 If ip routing is enabled , the command is ignored (but the default route Ip route 0.0.0.0 0.0.0.0 x ) is displayed ; Ipv6 enable 6 Associate route-map when route is republished (typical case) * i2003::3/128 ATT/P/OL ! Version ! R3 In the IPv6 specification, the aggregatable global unicast or local site address is not recommended as the next hop address. If you do this, the ICMPv6 redirect message will not work . Therefore, using the Linklocal address as the next hop may be more recommended in some cases. After all, the linklocal address is stable and long-lasting. When configuring the linklocal address as the next hop IP , you must associate the corresponding interface on the router.