ccnp routing and switching 300-101 pdf
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BGP is designed to AS transfer routes between, so it is actually a hop AS .
Neighbor 220.127.116.11 send-community
RouterID : 172.16.13.1
Note that the as-path access-list is also implicitly rejecting all by default.
The IP header is 20 bytes, the ICMP header is 8 bytes, and the ICMP data payload is 1472 bytes, which is exactly 1500 bytes. Therefore, on the CISCO IOS device, the size followed by the ping refers to the entire size of the outgoing IP packet.
After R2 show run , I found:
Router bgp 345
Reduce network migration time without disconnecting existing connections, and do not need to change device BGP configuration in large batches
Another problem with proxy ARP (from TCP/IP routing technology volume one)
Hostname R4 interface fa0/0
Redistribute ospf 1
OSPF and IBGP route re-release
Match ip address prefix-list 2 router bgp 100
Match x1 match x2 , x3 set Y
None | permit }}
Ip address 192.168.10.254 255.255.255.0
In the output of Show and more , you can use the pipe character | with a regular expression to filter the output.
Note: If CDP- based detection and object tracking- based detection are applied, the latter is preferred.
Show ip cef detail
Show ip dhcp binding Show dhcp binding on DHCP server
Neighbor 10.1.23.3 remote-as 300
Ip helper-address 192.168.100.1
Update message: contains the entire routing table, updated periodically
Note the changes here: When R2 passes the route of 30.0 to R1 , the seconday AS number is no longer inserted .
Sequence of next hops. The acceptable range is from 1 to 65535.
Route matching tool
We still have to implement R4 access to 18.104.22.168 network to go R1 , access 22.214.171.124 network to go to R2 , this time we adjust MED ,
(empty), in other words, the MED will not be transmitted out of this AS
Interface vlan 100
IP routing troubleshootingOSPF . In this way, for R4 , it goes to 192.168.1.0 , there is a sub-optimal path , that is, around the long way, take R2-R3-R3-R5
Therefore: the route is redistributed into OSPF , the automatically inherit these external routes BGP 's A_PATH property, note that only inherit AS_PATH
Then on R4 , you can only learn 126.96.36.199 .
Ok, then let's start the experiment below:
At the same time, the two routes are marked in the BGP table: " *> ", indicating that the two routes are valid , and the best or optimal, best , so they will be passed to the IBGP neighbor of R3 . That is R4
Think of the route reflection cluster as a whole, then after C is passed to the RR ,
R3 ,ccnp routing and switching 300-101 pdf, R4 , and R5 establish IBGP full interconnection, and R3 R4 R5 uses LOOPBACK as the update source and refers to the neighbor .
Aggregate-address 192.168.0.0 255.255.0.0 attribute-map test // Associate route-map test works on aggregated routes
MED attributes for routes published to the federation are retained throughout the federation
Set interface priority, CISCO IOS default 128 ; CatOS default 32
The route to the nearest BGP NEXT_HOP route is the route with the smallest IGP metric to the next hop router. After the basic configuration is completed, the BGP table of R4 is as follows:
Configure OSPF unicast updates:
NEXT_HOP to 10.1.123.2 , then if C is not on the router to the IP of PVC , will be a problem, so this should be taken into account.
Gateway of last resort is 172.16.12.1 to network 192.168.1.0
Route-map test permit 10 match interface Serial0/0 router ospf 1
Then according to our thinking, on the R4 should be able to see the choice of 188.8.131.52 is R3 is 184.108.40.206 , go to
1 : RIP-1 ;
A router that does not support the route reflector function can act as a single router cluster or as a client
Configure this command. When routing, the router only compares all routing entries with the AS_CONFED_SEQ attribute. This command is used for federated routers, while weight and LP have higher priority than MED.
Route-map test permit 10
The switch forwards the DHCP packets carrying the Option 82 information to the DHCP server.
SW1 and SW2 are configured as VTP mode client ; SW3 is configured as VTP mode Server
As shown above, the position of the line is 16+4=20 , so we get the summary address: 192.168.0.0/20 , which is the most accurate summary address.
" The When A Receives A Configuration Switch that the contains the BPDU Superior Information (Lower Bridge ID, path cost Lower, and SO Forth), IT Information Stores The Port for that. The this the If the BPDU IS ON The Received the root of The Port
Configuration last modified by 0.0.0.0 at 3-5-93 00:11:48
In 802.1D , the TYPE field uses only the highest and lowest bits to indicate TC and TC acknowledgment, and RSTP extends this field:
NEXT_HOP on shared Media (operation on shared media)
No synchronization no auto-summary
Metric LocPrf Weight
Bind a mac address to an interface
The MAC address pool of the CISCO CATALYST switch can hold up to 1024 addresses. The model of the switch determines the number of available MAC addresses . Not all Catalyst switches can support such multiple MAC addresses.
BGP based policy accounting on input is disabled BGP based policy accounting on output is disabled Hardware idb is FastEthernet0/0
Show ip b rib-failure
Configuration example 2 : as-path access-list with route-map
Example 2 of ip community-list (logical relationship):
Access-list 1 permit any route-map PBR permit 10 match ip address 1
Multilink Multilink-group interface
The longest match
Network 192.168.12.2 0.0.0.0 area 0
Network 10.10.10.0 mask 255.255.255.0
Complete the basic configuration
PC1 to deceive PC2 , the package made by the tools, such as anysend like, send a ARP request broadcast, the ARP data of the Ethernet frame header, source MAC of PC1 of the MAC , the purpose of MAC full F. , The contents of that key ARP protocol packets Wen ( ARP body ), that is, after the contents of the data frame Ethernet frame header, this is the ARP real content, which may encompass the main elements are: the sender mac , sender IP , the recipient MAC and recipient IP . PC1 that issued ARP data frame, SENDER MAC for their MAC addresses, but SenderIP gateway IP i.e.192.168.0.