ccna dumps 2019 pdf free download

ccna dumps 2019 pdf free download

Ip route 1.1.1.0 255.255.255.0 serial 0/0 Must be a zero field. Double-point bidirectional routing re-release Image When one or more consecutive 16- bit fields are 0 , the ::: is available, but only one is allowed in the entire abbreviation: R4#show ipv6 route ospf Image Neighbor FE80::CE01:8FF:FED8:10 route-map setNH out Redistribute ospf 3 subnets route-map OSPF3to2 Network 10.1.34.4 0.0.0.0 area 0 Metric=BW+DLY , where DLY is the accumulation of DLY along the inbound interface of the route , and BW is the minimum interface bandwidth. Obviously through DLY !! This is the direct link between R1-R3 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. Image The comparison principle of OE2 is first compared to the external metric of OE2 . If they are equal, further comparison of the internal metric is the metric to the ASBR . Access-list 1 permit 192.168.2.0 Routing Information Protocol (RIP) RFC1058 Command RFC1721 ! Interface Serial0/0 ipv6 enable R2(config)# access-list 1 deny 192.168.3.0 R2(config)# access-list 1 permit any R2(config)# router ospf 1 R2(config-router)#redistribute rip subnets Ipv6 unnmbered fast0/0 tunnel source fast0/0 Use a hold-down timer to prevent routing loops RFC1723 defines several compatibility switches Router(config-if)#ipv6 adress 2002::/64 eui-64 !! Also configured with an IPv6 address and populated with EUI-64 1/8 When we configure the ISATAP router on the host (pointing to the IPv4 address of the ISATAP router ), the ISATAP host starts sending RS messages to the ISATAP router , as shown below: Environmental description R1 , the subsequent packets should not exceed 1400 bytes. The capture of this process is as follows: Image As shown above, R1 , R2 , and R3 run RIP . In the initial situation, R2 will update its routing table to R1 , which assumes that there are three routes 1.0 , Ip address 202.101.12.1 255.255.255.0 The new routing table is typically sent to neighboring routers on a regular basis, and the triggered update is sent immediately in response to changes in the routing table. This is a very typical case. In the above figure, the network environment is like this. Suppose we have two routers, R1 and R2 , connected to the server farm. The server farm uses two three-layer switches to hang the network server. We have planned two subnets for production of 10.1.1.0/24 and office 10.1.2.0/24 . R3 is the access router. R1 , R2 , and R3 run OSPF . Ipv6 ospf 1 area 0 R1 , R2 establish IPv6 in IBGP neighbor relationship (based LOOPBACK Interface) ! PC (using router emulation) uses stateless auto get address: ipv6 address autoconfig default ! Ipv6 nd managed-config-flag Router bgp 12 ! Other configuration Access-list 1 permit any route-map PBR permit 10 match ip address 1 RIPng for IPv6 *Mar 1 00:11:48.023: ICMP: echo reply rcvd, src 2.2.2.2, dst 192.168.123.3 On the CISCO IOS router, configure the mapping of a host name to an IPv6 address as follows: Both of the above commands can be used to adjust the management distance of the routing protocol. The first command, distance ad ip-src , can adjust the management distance for a specific routing update source and a specific routing prefix. For example, I will use an OSPF. Some routes sent to me by the neighbor, the AD value is adjusted to 130 . 10.1.12.2 Ipv6 address autoconfig default ipv6 dhcp client pd test Image Certification !! In the GNS simulator environment, the Linklocal address of the serial port conflicts, because As long as a local site or global aggregatable unicast IPv6 address and its prefix length are configured on the network interface , the IPv6 prefix advertisement on the CISCO router is enabled . netsh interface ipv6 add route 3333 :: / 64 21 nexthop = fe80 :: 1 !! add an object of 3333 :: / 64 of IPv6 routing number associated with the index 21 interface, the next hop is fe80 :: 1 RIP-1 only sends RIPv1 updates We spotted FIG, R1 and R2 between runs RIP to exchange routing information, R2 by RIP learned the R1 release over 192.168.1.0/24 and 2.0 / 24 routing information loaded into the routing table, labeled R & lt . While R2 and R3 and running OSPF , establish OSPF adjacency, R2 also from R3 , by OSPF learned the two routes: 3.0 and 4.0 / 24 , is also loaded into the routing table, labeled O . So, for R2 ,ccna dumps 2019 pdf free download, it has its own route to the whole network, but inside R2 , we can understand this image: it will not change the route learned from RIP .The OSPF route is told to R3 , and the route learned from OSPF is not sent to R1 as a RIP route . For R2 , although there is complete routing information in its own routing table, it is as if there is a gap between the entries of R and O , which cannot be exceeded.