ccna exam review

ccna exam review

! Cisco Press - IS-IS Network Design Solutions IS-IS Network Design Solutions Ip router isis Ip vrf forwarding VPN-A 101 Ip address 10.1.45.4 255.255.255.0 Interface eth0 0/0 SNPA ( Subnetwork point of attachment ) Interface eth 0/1 R2(config-if)#mpls traffic-eng administrative-weight 100 The global configuration command metric-narrow can be restored to the original default configuration. PseudoNode ( PSN ) Note ESH and ISH PDU are ES-IS of the PDU instead of IS-IS of the PDU Priority 1 : 9375000 !! Backup tunnel 75000 LSP Seq Num *Aug 18 04:37:06.243: STYLE type 1 length 8 : *Aug 18 09:06:07.919: FastEthernet0/0 Process ID 1, Area 0 ! An intermediate system (which can be understood as a router) has at least one NET (up to 254 ) and the system ID must be the same. Cisco routers support up to three NET addresses by default ,ccna exam review, which can be modified using the following command: PLR ( Point of local repair ): Local repair point, this is the head end of the backup tunnel PATH IS-IS requires the same length of the SystemID in the entire domain . If you receive the IIH , the " System ID Length " field is local to Swap Interface Ip unnumbered Loopback0 tunnel destination 5.5.5.5 *Aug 18 04:37:06.239: Turn off TTL propagation ! Router(config-if)#tunnel mpls traffic-eng bandwidth BW Traffic using traffic engineering uses source-based routing instead of routing based on destination IP address Router isis 75000 IGP Id: 1.1.1.1, MPLS TE Id: 1.1.1.1 Router Node id 1 Egress LSRs — Egress LSRs receive labeled packets, remove the label(s), and send them on a data link. Ingress and egress LSRs are edge LSRs. Set-overload-bit suppress external redistribute connected level-1 InLabel : - Address-family ipv4 vrf VPN-A no synchronization Keep priority Ip rsvp bandwidth The configuration of R2 is supplemented as follows: 1 10.1.46.4 128 msec 152 msec 120 msec BandwidthOverride: disabled LockDown: disabled Verbatim: disabled Tag or VC Domain-password *Aug 18 09:06:07.919: Hop Addr: 127.0.0.1 LIH: 0x00000000 When IS-IS is running on an NBMA network, there are some problems. MPLS TE tunnels, also known as Traffic trucks , are used to overcome hop-by-hop IP routing defects. Label Add: The top label is replaced (exchanged) by a new label, and one or more labels are added to the upper layer of the replaced label. 104 R1#show ip route 5.5.5.0 We see that R1 these inter-area routes are still there, but R1 no longer refers to the default route to R2 . ! ! 120s 1.1.1.1 I/E IS-IS router advertisements contain direct neighbors and routing information TLVs . For TE of ISIS extension Router(config-if)#mpls traffic-eng tunnels 75000 !!! Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 1.1.1.1:0 TCP connection: 2.2.2.2.31044 - 1.1.1.1.646 Priority 0 : 9375000 In this way, when R2 forwards the label data, the data is pushed into the two-layer label, the outer layer is the TE tunnel label 304 , and the inner layer is the VPNv4 label 505. After the label is added to the R3 , the R3 pops the top label, and then the data is Forwarded to R4 , but it is stupid when it comes to R4 , because the 505 tag is generated by R5 , R4 does not know the 505 tag, so it loses the packet.