CCNP TSHOOT 6.0 - Cisco Learning Home
CCNP TSHOOT 6.0 - Cisco Learning Home
CCNP TSHOOT 6.0 - Cisco Learning Home
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<strong>CCNP</strong>v6 <strong>TSHOOT</strong><br />
Retransmissions sent: 1 Out-of-sequence rcvd: 0<br />
Topology-ids on interface - 0<br />
Authentication mode is not set<br />
Fa0/5 0 0/0 0 0/1 50 0<br />
Hello interval is 5 sec<br />
Next xmit serial <br />
Un/reliable mcasts: 0/18 Un/reliable ucasts: 9/25<br />
Mcast exceptions: 2 CR packets: 2 ACKs suppressed: 3<br />
Retransmissions sent: 6 Out-of-sequence rcvd: 1<br />
Topology-ids on interface - 0<br />
Authentication mode is md5, key-chain is "EIGRPCHAIN"<br />
In the above example, no authentication is configured on DLS2 interface VLAN 200. MD5 authentication is<br />
configured on interface Fa0/5 using key chain EIGRPCHAIN.<br />
DLS2#debug eigrp packets<br />
EIGRP Packets debugging is on<br />
(UPDATE, REQUEST, QUERY, REPLY, HELLO, IPXSAP, PROBE, ACK, STUB, SIAQUERY,<br />
SIAREPLY)<br />
DLS2#<br />
Dec 14 18:21:51.626: EIGRP: Sending HELLO on FastEthernet0/5<br />
Dec 15 18:21:51.626: AS 1, Flags 0x0, Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0<br />
Dec 15 18:21:51.895: EIGRP: FastEthernet0/5: ignored packet from 10.1.2.14, opcode<br />
= 5 (missing authentication)<br />
Dec 15 18:21:52.255: EIGRP: Sending HELLO on Vlan200<br />
Dec 15 18:21:52.255: AS 1, Flags 0x0, Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0<br />
Dec 15 18:21:54.495: EIGRP: Received HELLO on Vlan200 nbr 10.1.200.252<br />
Dec 15 18:21:54.495: AS 1, Flags 0x0, Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0<br />
peerQ un/rely 0/0<br />
DLS2#debug eigrp packets<br />
EIGRP Packets debugging is on<br />
(UPDATE, REQUEST, QUERY, REPLY, HELLO, IPXSAP, PROBE, ACK, STUB, SIAQUERY,<br />
SIAREPLY)<br />
Dec 15 18:28:38.442: EIGRP: Sending UPDATE on FastEthernet0/5 tid 0<br />
Dec 15 18:28:38.442: AS 1, Flags 0x2, Seq 21/0 interfaceQ 2/0 iidbQ un/rely 0/<br />
0 serno 1-10<br />
Dec 15 18:28:38.442: EIGRP: received packet with MD5 authentication, key id = 1<br />
Dec 15 18:28:38.442: EIGRP: Received HELLO on FastEthernet0/5 nbr 10.1.2.14<br />
In the first debug example above, authentication is configured on DLS2 Fa0/5. However, it is not configured on R3<br />
Fa0/1, and DLS2 ignores packets from R3. No authentication is required on VLAN 200, so DLS2 is able to send<br />
and receive hello messages with DLS1.<br />
In the second debug example above, authentication is now configured on R3 Fa0/1, and DLS2 accepts hello<br />
packets from R3.<br />
R3#show ip route<br />
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP<br />
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area<br />
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2<br />
E1 - OSPF external type 1, E2 - OSPF external type 2<br />
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2<br />
All contents are Copyright © 1992–2010 <strong>Cisco</strong> Systems, Inc. All rights reserved. This document is <strong>Cisco</strong> Public Information. Page 14 of 17
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