ccna study guide

ccna study guide

Ipv6 nd prefix 2012::/64 890000 720000 no-autoconfig The dual-stack host uses HTTP to access the tunneling proxy through IPv4 . This dual-stack host may be an end user that fills in a web page. ICMPv6 ( RFC2463 ) Set ip default next-hop 10.1.12.1 Image --- 202.101.100.2 Static route Via FE80::FFFF:FE10:2, Serial0/0 Image When a host receives an RA router advertisement, it will look at the M bit in the RA . If the M bit is 1 , it starts looking for DHCP on the LAN . RIP-1 Only 1 : Request message, requesting all or part of the routing information from the neighbor; Working Mechanism Image 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. Route-map features Router os 1 Frame-relay map ipv6 FE80::5C10:8CFF:FEE0:FE89 102 broadcast Redirect message RIP defines two types of request messages and response messages. Show ip cef Must be zero Ipv6 route ::/0 tunnel 0 Access-list 1 permit 11.11.11.0 ! If the outbound interface is a broadcast interface, it may impose an additional burden ( ARP ) on the nodes under the interface or cause potential problems. Tunnel adapter isatap.{0DB7233C-89B7-49DB-A8C0-D1AA005F4E6A}: By default, the longest matching principle is adopted. If it matches, it will be forwarded. If there is no match, the default route will be found. If the default route is not available, it will be discarded. Router bgp 300 R1 and R2 are in AS12 , and OSPFv3 is running in the AS , so that R1 and R2 can learn the loopback route of the other party. Area Address(es): 49.0002 SNPA: *HDLC* ! ! Ipv6 address 2001:12::1/64 The prefix list contains the serial number, matching from the smallest Image RIPv2 Image One of the ideal solutions is to transform the network topology: A few notes: Image Image Image The PMTU discovery protocol is defined in RFC1981 . IPv6 PMUTD uses ICMPv6 Type 2 messages. The typical process is as follows: Interface loopback0 !! Attention tunnel mode The configuration of R1 is as follows (basic configuration and OSPFv3 ): Perform a poison reverse, which is turned off by default. Refcount 6 The address family message is always 2 by default , and is 0 when requesting the entire routing table. 13 Via FE80::FFFF:FE10:2, Serial0/0 OI 2001:34::/64 [110/192] Router ospf 1 Ipv6 address 2001:0001::FFFF/64 ipv6 enable LSP Holdtime R1 , R2 establish IPv6 in IBGP neighbor relationship (based LOOPBACK Interface) 0000: Add a 32- bit IPv4 address after 5EFE . As shown in the following figure, if the IPv4 address (for tunneling) configured for the ISATAP router is 2.2.2.2 , the interface identifier of the ISATAP tunnel is: Router ospf 1 Both 4 Interface FastEthernet1/0 Overview of tunneling mechanism 100x xxxx xxxx xxxx Duplicate address detection ( DAD ) A static route to the host Milne is added to the ROO . The next hop is the E1 port of Kanga . The purpose is to pass the bridge that is often congested. But found that Kanga will be sent to the host The above command defines the source address allowed to be IPv6 nat , matching with an IPv6 ACL . Image 192.168.123.2 as the next hop better, then R2 subsequent packets sent to R2 . If the packets of the same data stream are sent in different paths, the IP packets may need to be re-queued when they reach the destination. This may reduce the forwarding performance of traffic such as VoIP , or if the packets arrive out of order, the quality of service will be degraded, packets may be discarded, and delay jitter will be added. LocPrf The summary of the route is actually done by the operation of the subnet mask. For the following example: 2001:2::2 // There are routes in the routing table of R3 : 1.1.1.0 , 2.2.2.0 ,ccna study guide, 192.168.12.0 Tool overview Image Tunneling technology is generally used to transmit incompatible protocols or special data in existing networks. In the existing IPv4 infrastructure that is ubiquitous on the Internet , tunneling technology can be used to connect IPv6 isolated islands. Of course, we prefer a network, link, and infrastructure consisting of pure IPv6 connections to any transition and coexisting strategy (such as tunneling) . In fact, the IPv6 tunneling mechanism on the IPv4 infrastructure is considered an alternative method only when pure IPv6 connectivity is not possible in the network, connectivity, and infrastructure .