ticket TT06

Enviado por mikedenofte el Jue, 02/11/2017 - 15:55
ticket TT06

Requisito: Verifique conectividad utilizando

S3G#ping 2001:cafe:1::1 source 2001:acad:100::1

el problema en este ejercicio se origina en dmvpn ya que no hay conectividad en sus 3 puntos, esto se debe a que en el router ISP no existe la ruta ipv4 por defecto que apunta hacia S3A

ISP#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       + - replicated route, % - next hop override

Gateway of last resort is not set

      200.0.0.0/24 is variably subnetted, 2 subnets, 2 masks
C        200.0.0.0/29 is directly connected, GigabitEthernet0/0
L        200.0.0.1/32 is directly connected, GigabitEthernet0/0
      200.200.200.0/29 is subnetted, 1 subnets
B        200.200.200.0 [20/0] via 200.0.0.2, 00:18:40
      201.0.0.0/24 is variably subnetted, 2 subnets, 2 masks
C        201.0.0.0/29 is directly connected, GigabitEthernet1/0
L        201.0.0.1/32 is directly connected, GigabitEthernet1/0
      202.0.0.0/24 is variably subnetted, 2 subnets, 2 masks
C        202.0.0.0/29 is directly connected, GigabitEthernet2/0
L        202.0.0.1/32 is directly connected, GigabitEthernet2/0
ISP#

 
por ende, tampoco se encuentra la ruta en BGP


ISP#sh ip bgp top *
For address family: IPv4 Unicast

BGP table version is 2, local router ID is 202.0.0.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
              x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  200.200.200.0/29 200.0.0.2                0             0 100 i


La solucion seria:

ISP(config)#ip route 0.0.0.0 0.0.0.0 200.0.0.2
ISP(config)#router bgp 200
ISP(config-router)#network 0.0.0.0 mask 0.0.0.0
ISP(config-router)#exit
ISP(config)#
S3G#ping 2001:cafe:1::1 sou 2001:acad:100::1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:CAFE:1::1, timeout is 2 seconds:
Packet sent with a source address of 2001:ACAD:100::1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 216/225/244 ms
S3G#