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hi:
I would appreciate your help.
I am new to IPv6 configuration on Cisco routers. My
name is Mohan. I am a stundent
at Wichita State University. We have a studnet Cisco lab. My project involves IPv6, IPv4 transition. I need some help with some IPv6 basics. I tried few
times, but just could not get the 'tunnels' to work.
My configuration files follows.
PROBLEM:
IPv6 Traffic does not go thru R7(IPv4) even with tunnels installed? (for example, ping ipv6 from R3 to int s0/0 in R4 fails) ======================================================================== Network used (IOS 12.2(T), Cisco3640s) s0/0 s1/0 s1/1 s0/0 <R4dual stack> -----serial-link--------<R7/IPv4 only>-----------serial-link--------< R6-IPv6/IPv4 dual stack> | fa0/0 --------------------- | fa0/0 <R3-IPv6 only router> ========================================================================
Interface Addresses IPv4 Address IPv6
Address
R4 int s0/0 193.30.60.1/24 3001::/64 eui-64 R7 int s1/0 193.30.60.2/24 NA int s1/1 156.27.0.2/16 NA R6 int s0/0 156.27.0.1/16 3001::/64 eui-64 int fa0/0 10.10.10.1/8 3002::/64 eui-64 R3 int fa0/0 3002::/64 eui-64 ========================================================== Router R6 - dual stack router, runs RIP, RIPv6, connected to IPv6 only router R3 and IPv4 only router R7 ======================================================================= r6#sh run
Building configuration... Current configuration : 1564 bytes
! version 12.2 hostname r6
! boot system flash:c3640-jk9s-mz.122-2.T.bin ipv6 unicast-routing
! interface Tunnel0 no ip address ipv6 address 3FFE:B00:C18:1::3/127 tunnel source 10.10.10.1 tunnel destination 20.20.20.1 tunnel mode ipv6ip ! interface Tunnel1 no ip address no ip redirects tunnel source Serial0/0 tunnel mode ipv6ip auto-tunnel ! interface FastEthernet0/0 ip address 10.10.10.1 255.0.0.0 duplex auto speed auto ipv6 address 3002::/64 eui-64 ipv6 rip Rip6 enable ! interface Serial0/0 ip address 156.27.0.1 255.255.0.0 ipv6 address 3001::/64 eui-64 ipv6 rip Rip6 enable ! interface TokenRing0/0 no ip address shutdown ring-speed 16 ! router rip network 10.0.0.0 network 156.27.0.0 ! ! ipv6 router rip Rip6 ! end r6#
=======================================================================
r6#sh ip rou
Codes: C - connected, S - static, I - IGRP, 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, E - EGP i - IS-IS, 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 Gateway of last resort is not set
R 193.30.60.0/24 [120/1] via
156.27.0.2, 00:00:00, Serial0/0
R 20.0.0.0/8 [120/2] via 156.27.0.2, 00:00:00, Serial0/0 C 156.27.0.0/16 is directly connected, Serial0/0 C 10.0.0.0/8 is directly connected, FastEthernet0/0 ======================================================================
r6#sh ipv6 int brief FastEthernet0/0 [up/up] 3002::204:9AFF:FE8A:5641 Serial0/0 [up/up] 3001::4:9A8A:5641:3 TokenRing0/0 [administratively down/down] unassigned Serial0/1 [administratively down/down] unassigned ATM2/0 [administratively down/down] unassigned Tunnel0 [up/up] 3FFE:B00:C18:1::3 Tunnel1 [up/up] ::156.27.0.1 ================================================================== r6#sh ipv6 int
FastEthernet0/0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::204:9AFF:FE8A:5641 Global unicast address(es): 3002::204:9AFF:FE8A:5641, subnet is 3002::/64 Joined group address(es): FF02::1 FF02::2 FF02::1:FF8A:5641 FF02::9 MTU is 1500 bytes ICMP error messages limited to one every 500 milliseconds ND reachable time is 30000 milliseconds ND advertised reachable time is 0 milliseconds ND advertised retransmit interval is 0 milliseconds ND router advertisements are sent every 200 seconds ND router advertisements live for 1800 seconds Hosts use stateless autoconfig for addresses. Serial0/0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::4:9A8A:5641:3 Global unicast address(es): 3001::4:9A8A:5641:3, subnet is 3001::/64 Joined group address(es): FF02::1 FF02::2 FF02::1:FF41:3 FF02::9 MTU is 1500 bytes ICMP error messages limited to one every 500 milliseconds ND reachable time is 30000 milliseconds Hosts use stateless autoconfig for addresses. Tunnel0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::A0A:A01 Global unicast address(es): 3FFE:B00:C18:1::3, subnet is 3FFE:B00:C18:1::3/127 Joined group address(es): FF02::1 FF02::2 FF02::1:FF41:A FF02::1:FF00:3 FF02::1:FFC8:D201 FF02::1:FF0A:A01 MTU is 1480 bytes ICMP error messages limited to one every 500 milliseconds ND reachable time is 30000 milliseconds Hosts use stateless autoconfig for addresses. Tunnel1 is up, line protocol is up IPv6 is enabled, link-local address is FE80::9C1B:1 Global unicast address(es): ::156.27.0.1, subnet is ::/96 Joined group address(es): FF02::1 FF02::2 FF02::1:FF41:B FF02::1:FF1B:1 MTU is 1480 bytes ICMP error messages limited to one every 500 milliseconds ND reachable time is 30000 milliseconds Hosts use stateless autoconfig for addresses. r6# ==================================================================
r6#sh ipv6 rou
IPv6 Routing Table - 9 entries Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP Timers: Uptime/Expires L ::156.27.0.1/128 [0/0]
via ::156.27.0.1, Tunnel1, 00:39:32/never via ::, Tunnel1, 00:39:31/never C ::156.27.0.1/96 [0/0] via ::, Tunnel1, 00:39:31/never L 3001::4:9A8A:5641:3/128 [0/0] via ::, Serial0/0, 01:00:07/never C 3001::/64 [0/0] via ::, Serial0/0, 01:00:07/never L 3002::204:9AFF:FE8A:5641/128 [0/0] via ::, FastEthernet0/0, 01:00:07/never C 3002::/64 [0/0] via ::, FastEthernet0/0, 01:00:07/never L 3FFE:B00:C18:1::3/128 [0/0] via ::, Tunnel0, 00:04:02/never C 3FFE:B00:C18:1::3/127 [0/0] via ::, Tunnel0, 00:04:02/never L FE80::/64 [0/0] via ::, Null0, 01:00:07/never r6# =============================================================================
============================================================================= Router R4 -dual stack router at the other end of
IPv4 router
r4#sh run
Building configuration... Current configuration : 1167 bytes
! version 12.2 hostname r4
! ipv6 unicast-routing ! ! interface Tunnel0 no ip address ipv6 address 3FFE:B00:C18:1::2/127 tunnel source 20.20.20.1 tunnel destination 10.10.10.1 tunnel mode ipv6ip ! interface Tunnel1 no ip address no ip redirects tunnel source Serial0/0 tunnel mode ipv6ip auto-tunnel ! interface FastEthernet0/0 ip address 20.20.20.1 255.0.0.0 duplex auto speed auto ipv6 enable ipv6 rip rip4 enable ! interface Serial0/0 ip address 193.30.60.1 255.255.255.0 ipv6 address 3001::/64 eui-64 ipv6 rip rip4 enable no fair-queue ! router rip network 20.0.0.0 network 193.30.60.0 ! ! ipv6 router rip rip4 ! end r4#
================================================================= r4#
r4#sh ipv6 rou IPv6 Routing Table - 7 entries Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP Timers: Uptime/Expires L ::193.30.60.1/128 [0/0]
via ::193.30.60.1, Tunnel1, 00:42:54/never via ::, Tunnel1, 00:42:53/never C ::193.30.60.1/96 [0/0] via ::, Tunnel1, 00:42:53/never L 3001::4:9AE4:4B81:3/128 [0/0] via ::, Serial0/0, 01:28:41/never C 3001::/64 [0/0] via ::, Serial0/0, 01:28:41/never L 3FFE:B00:C18:1::2/128 [0/0] via ::, Tunnel0, 00:08:50/never C 3FFE:B00:C18:1::2/127 [0/0] via ::, Tunnel0, 00:08:50/never L FE80::/64 [0/0] via ::, Null0, 01:47:39/never r4# ======================================================================
r4#
r4#sh ipv6 neigh r4#sh ipv6 int brief FastEthernet0/0 [up/up] FE80::204:9AFF:FEE4:4B81 Serial0/0 [up/up] 3001::4:9AE4:4B81:3 TokenRing0/0 [administratively down/down] unassigned Tunnel0 [up/up] 3FFE:B00:C18:1::2 Tunnel1 [up/up] ::193.30.60.1 r4# =======================================================================
r4#sh ipv6 int
FastEthernet0/0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::204:9AFF:FEE4:4B81 No global unicast address is configured Joined group address(es): FF02::1 FF02::1:FFE4:4B81 FF02::2 FF02::9 MTU is 1500 bytes ICMP error messages limited to one every 500 milliseconds ND reachable time is 30000 milliseconds ND advertised reachable time is 0 milliseconds ND advertised retransmit interval is 0 milliseconds ND router advertisements are sent every 200 seconds ND router advertisements live for 1800 seconds Hosts use stateless autoconfig for addresses. Serial0/0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::4:9AE4:4B81:3 Global unicast address(es): 3001::4:9AE4:4B81:3, subnet is 3001::/64 Joined group address(es): FF02::1 FF02::1:FF81:3 FF02::2 FF02::9 MTU is 1500 bytes ICMP error messages limited to one every 500 milliseconds ND reachable time is 30000 milliseconds Hosts use stateless autoconfig for addresses. Tunnel0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::1414:1401 Global unicast address(es): 3FFE:B00:C18:1::2, subnet is 3FFE:B00:C18:1::2/127 Joined group address(es): FF02::1 FF02::2 FF02::1:FF81:8 FF02::1:FF00:2 FF02::1:FFC8:C801 FF02::1:FF14:1401 MTU is 1480 bytes ICMP error messages limited to one every 500 milliseconds ND reachable time is 30000 milliseconds Hosts use stateless autoconfig for addresses. Tunnel1 is up, line protocol is up IPv6 is enabled, link-local address is FE80::C11E:3C01 Global unicast address(es): ::193.30.60.1, subnet is ::/96 Joined group address(es): FF02::1 FF02::2 FF02::1:FF81:9 FF02::1:FF1E:3C01 MTU is 1480 bytes ICMP error messages limited to one every 500 milliseconds ND reachable time is 30000 milliseconds Hosts use stateless autoconfig for addresses. r4# ======================================================================== r4#sh ipv6 rip
RIP process "rip4", port 521, multicast-group FF02::9, pid 112 Administrative distance is 120. Routing table is 0 Updates every 30 seconds, expire after 180 Holddown lasts 180 seconds, garbage collect after 120 Split horizon is on; poison reverse is off Default routes are not generated Periodic updates 221, trigger updates 0 r4# ========================================================================= ========================================================================= r3#sh ipv6 rou
IPv6 Routing Table - 4 entries Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP Timers: Uptime/Expires R 3001::/64 [120/2]
via FE80::204:9AFF:FE8A:5641, FastEthernet0/0, 00:02:07/00:02:47 L 3002::204:9AFF:FEE4:4B61/128 [0/0] via ::, FastEthernet0/0, 02:50:48/never C 3002::/64 [0/0] via ::, FastEthernet0/0, 02:50:48/never L FE80::/64 [0/0] via ::, Null0, 02:50:48/never ==================================================================
r3#ping ipv6 3001::4:9A8A:5641:3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3001::4:9A8A:5641:3, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms r3#ping ipv6 3001::4:9AE4:4B81:3 Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3001::4:9AE4:4B81:3, timeout is 2 seconds: ..... Success rate is 0 percent (0/5) ==================================================================
r3#sh run Building configuration... Current configuration : 916 bytes
! version 12.2 hostname r3
! ipv6 unicast-routing ! ! interface FastEthernet0/0 ip address 10.10.10.2 255.0.0.0 duplex auto speed auto ipv6 address 3002::/64 eui-64 ipv6 rip rip3 enable ipv6 rip rip3 default-information originate ! ! ipv6 router rip rip3 ! end ==================================================================
r3# r3#sh ipv6 neigh
IPv6 Address Age Link-layer Addr State Interface 3002::204:9AFF:FE8A:5641 131 0004.9a8a.5641 STALE FastEthernet 0/0 FE80::204:9AFF:FE8A:5641 2 0004.9a8a.5641 STALE FastEthernet 0/0 r3#
==================================================================
r3#sh ipv6 int FastEthernet0/0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::204:9AFF:FEE4:4B61 Global unicast address(es): 3002::204:9AFF:FEE4:4B61, subnet is 3002::/64 Joined group address(es): FF02::1 FF02::2 FF02::1:FFE4:4B61 FF02::9 MTU is 1500 bytes ICMP error messages limited to one every 500 milliseconds ND reachable time is 30000 milliseconds ND advertised reachable time is 0 milliseconds ND advertised retransmit interval is 0 milliseconds ND router advertisements are sent every 200 seconds ND router advertisements live for 1800 seconds Hosts use stateless autoconfig for addresses. r3# ====================================================================
==================================================================== r7#sh run
Building configuration... version 12.2
hostname r7
! ! interface Serial1/0 ip address 193.30.60.2 255.255.255.0 clockrate 2000000 ! interface Serial1/1 ip address 156.27.0.2 255.255.0.0 clockrate 2000000 ! router rip network 193.30.60.0 network 156.27.0.0 ! end r7#
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