it braindumps

it braindumps

Network 10.1.12.2 0.0.0.0 area 0 0 interfaces: (Tunnel0) Destination: 5.5.5.5 After everyone's LFIB is built,it braindumps, we can see that when A receives an IP packet and wants to access X , then A checks its own CEF table. The ACL filters out LDP packets. This prevents LDP adjacency between R1 and R4 from being established. Let's observe the phenomenon. The router address TLV carries the router TE router ID for the TE . R1(config-keychain-key)#key-string cisco R1(config-keychain-key)#exit R3 is a passive session recipient. Route summarization on the L1/L2 router ( to level1 ) 10.1.13.3 10.1.12.2 [MPLS: Label 200 Exp 0] 4 msec 0 msec 0 msec 0xA538 Peak rate 0 kbits/sec Fast tag rewrite with Fa0/0, 10.1.12.2, tags commit: {203} via 10.1.12.2, FastEthernet0/0, 0 dependencies Intermediate LSRs - Intermediate LSRs receive an incoming labeled packet, perform an operation on it, switch the packet, and send the packet on the correct data link. End System terminal system *Aug 18 09:06:07.919: Tun Sender: 1.1.1.1 LSP ID: 247 Feature overview Then, finally, the data is introduced into the established tunnel . In fact, after creating a TE tunnel on R1 , a local tunnel is in it. Sender_Tspec Bw[4]: The POP will only pop the top label header. The packet forwarded by this action can be an IP packet or an MPLS label packet. ...... ...... Show ip route isis Configure this feature on the A device (usually on the edge device) no mpls ip propagate-ttl Prefix Going f.0/0 , the outbound tag used is 200 , while 10.1.35.5 accesses 1.1.1.1 and goes to F1/0 , and the outbound tag used is 400 . *Aug 18 09:06:02.699: Controlled Load Service break bit=0 service length=0 0x26DC Ip cef Requirements for IGP ! 366 400 Configuration example Now we will complete the following configuration on R2 : 0 kbits/sec The tag value is 1 , and this tag can appear anywhere on the tag stack, except for the bottom of the stack. Pop tag BandwidthOverride: disabled LockDown: disabled Verbatim: disabled Network 10.1.12.2 0.0.0.0 area 0 Network 10.1.24.2 0.0.0.0 area 0 Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 75M Router ospf 1 Bandwidth: 2000 Uptime: 10 seconds Selection: reoptimization Route summarization must be performed on the originating router of the L2 route, otherwise invalid If there is no PSN pseudo node, the situation is like the above picture. The LSPDB of all routers on the LAN is as shown in the figure. The red dotted line in the figure is the adjacency. We see that there are many adjacencies and the LSPDB is huge. So, is there a PSN pseudo node? Look at the picture below: Nolabel/506 2 *Aug 18 09:06:07.919: EXPLICIT_ROUTE type 1 length 68: *Aug 18 11:26:02.546: SESSION Conceptual introduction 1.0.0.1 MPLS LDP-IGP synchronization is enabled in the IGP process and applied to all interfaces running the IGP . ! Shared-Explicit (SE) FLOWSPEC ● RFC 3277 LDP initial/maximum backoff: 15/120 sec LDP loop detection: off Tunnel mpls traffic-eng autoroute metric relative z When the change attribute (path bandwidth), using Make Before Break manner ! But if we modify the configuration on R1 : In the above experiment, we announced the direct connection network of R1-R5 and R4-R6 in Core OSPF . However, we know that in actual situations, this chain outside AS is not declared in Core IGP . Road, so let's take a look at it. If you do not announce these two direct links in OSPF , what will happen : Since OSPF does not have these two directly connected segments, then 5.5.5.5 and 6.6.6.6 learn to come in. preferably not a need in R1 of the R4 to use Next-Hop-Self , R4 to R1 is also the same reason.