Posted by: Mar Apuhin | November 12, 2009

Mininum SSH Server IOS Configuration

hostname Router1
!
ip domain-name cciepilot.com
!
crypto key generate rsa
!
!
username cisco password 0csic
username x secret y
!
ip ssh version 2
!
line vty 0 4
login local

Posted by: Mar Apuhin | November 8, 2009

Internetwork Experts CCIE 2.0 Program

Posted by: Mar Apuhin | November 4, 2009

CCIE Routing & Switching Open Lecture Series

* IP Multicast – 11/13/2008 Part 1
o PIM Dense Mode
o RPF Failure
o Static Mroutes

* IP Multicast – 11/13/2008 Part 2
o PIM Sparse Mode
o Static RP Assignment
o IGMP Join
o PIM Join
o PIM Register

* IP Multicast – 11/13/2008 Part 3
o PIM Register Troubleshooting

* IP Multicast – 11/14/2008 Part 1
o PIM Sparse Dense Mode

* IP Multicast – 11/14/2008 Part 2
o PIM Sparse Dense Mode with Auto-RP

* IP Multicast – 11/14/2008 Part 3
o PIM AutoRP Listener

* IP Multicast – 11/14/2008 Part 4
o PIM NBMA Mode

* IP Multicast – 11/14/2008 Part 5
o PIM NBMA Mode
o Default RP Placement

* OSPF – 11/18/2008 Part 1
o OSPF Intra-Area Routing

* OSPF – 11/18/2008 Part 2
o OSPF Inter-Area Routing

* OSPF – 11/18/2008 Part 3
o OSPF Inter-Area Routing with Multiple ABRs

* OSPF – 11/18/2008 Part 4
o OSPF External Routing

* OSPF – 11/20/2008 Part 1
o OSPF Virtual Links

* OSPF – 11/20/2008 Part 2
o Traffic Engineering with Virtual-Links

* BGP – 11/26/2008
o BGP Traffic Engineering with Aggregation

* QoS – 12/03/2008
o Custom Queuing

* QoS – 12/04/2008
o WFQ
o CBWFQ
o Bandwidth Reservations
o Prioritization with LLQ

* Bridging & Switching – 12/09/2008
o EtherChannel
o Dot1q Tunneling
o EtherChannel over Dot1q Tunneling

* IP Routing – 12/16/2008
o IP SLA
o Enhanced Object Tracking
o Reliable Static Routing
o Reliable Policy Routing

* RIP – 12/17/2008
o RIP Filtering

* Redistribution – 12/23/2008
o Advanced IPv4 Redistribution

* IPv6 – 12/30/2008
o Advanced IPv6 Design

* NAT – 01/14/2009
o Advanced NAT Design

* First Hop Redundancy – 01/15/2009
o Advanced First Hop Redundancy Protocols

* Redistribution – 01/23/2009
o Advanced IPv4 Redistribution

* BGP – 01/28/2009
o BGP Conditional Route Injection

* BGP – 01/29/2009
o BGP Next-Hop Processing

* Security – 02/04/2009
o Reflexive Access-Lists
o CBAC
o TCP Intercept

* Security – 02/06/2009
o Dynamic Access-Lists
o Time Based Access-Lists

* Multicast – 02/11/2009
o IP Multicast Helper Map
o Broadcast to Multicast Conversions

* Security – 02/12/2009
o LAN Security
o DHCP Snooping
o IP Source Guard
o Dynamic ARP Inspection

* Security – 02/18/2009
o Local Command Authorization
o Role Based CLI

* Security – 02/19/2009
o AAA

* BGP – 02/25/2009
o BGP Route Reflection and Clusters

* BGP – 02/26/2009
o BGP Aggregation

* BGP – 03/05/2009
o BGP Synchronization
o BGP and IGP Redistribution

* IPv6 – 03/10/2009
o IPv6 BGP

* BGP – 03/18/2009
o BGP Communities

* Bridging & Switching – 03/19/2009
o 802.1q Tunnelling and EtherChannel

* Core Knowledge – 04/01/2009
o Open Ended Questions
o Core Knowledge Simulation

* IP Multicast – 04/02/2009
o Understanding RPF Check

* Security – 04/08/2009
o Content Based Access Control (CBAC)

* CCIE Lab Strategy – 04/09/2009
o Task Tracker

* Dynamips with GNS3 – 04/22/2009
o Using GNS3 For Lab Preparation

* IP Routing – 04/23/2009
o Route Config BP

* Security – 04/30/2009
o Calculating Complex Access Lists

* BGP – 05/01/2009
o BGP Bestpath Selection

* Bridging & Switching – 05/07/2009
o Spanning Tree Features

* Bridging & Switching – 05/08/2009
o Multiple Spanning Tree (MST)

* Bridging & Switching – 05/13/2009
o MST – Multiple Regions

* Bridging & Switching – 05/14/2009
o Point-to-Point Protocol (PPP)
o PPP over Frame Relay (PPPoFR)

* Bridging & Switching – 05/20/2009
o Layer 2 Catalyst QoS

* IP Routing – 05/21/2009
o GRE Tunnelling
o Recursive Routing

* EIGRP – 05/28/2009
o EIGRP Unequal Cost Load Balancing

* RIP – 06/03/2009
o RIPv2 Filtering

* EIGRP – 06/04/2009
o EIGRP Filtering and Stub Routing

* Security – 06/10/2009
o Security – BGP Remotely Triggered Blackhole Filtering

* Security – 06/12/2009
o BGP Sinkhole Filtering

* Bridging & Switching – 06/25/2009
o Transparent Bridging
o IRB

* QoS – 06/24/2009
o Frame Relay Traffic Shaping

* OSPF – 06/30/2009
o OSPF Filtering

* IGP – 07/02/2009
o IGP Summarization

* IP Services – 07/07/2009
o NAT TCP Load Balancing
o Server Load Balancing
o IOS SLB

* BGP – 07/09/2009
o BGP Communities

* Using the Cisco Documentation – 07/16/2009
o Using the Cisco Documentation

* MPLS – 07/17/2009
o CCIE R&S v4.0 Blueprint
o MPLS Introduction

* MPLS – 07/23/2009
o MPLS Configuration

* MPLS – 07/24/2009
o MPLS Configuration (Cont)

* MPLS – 07/28/2009
o MPLS L3VPN Verification

* Security – 07/30/2009
o Zone Based Policy Firewall

Posted by: Mar Apuhin | October 20, 2009

The CCIE Lab

CCIE Lab inside look in San Jose (I think).

Posted by: Mar Apuhin | September 10, 2009

The complete official IPV6 configuration library from CISCO.COM

I found this very interesting URL from DOC CD.

Cisco IOS IPv6 Configuration Library

http://www.cisco.com/en/US/docs/ios/12_2t/ipv6/ipv6_vgf.html#wp1000700

As I progress on my study I realized the best workbook for CCIE
Study is nothing but the DOC CD itself.

Right?

Posted by: Mar Apuhin | September 7, 2009

EIGRP stub feature demonstration.

Diagram:

<RIP>—–R1——-<EIGRP>——-R2—<RIP>
                  |
         Loopbacks0-3

Loopbacks0-3

R1:
router eigrp 100
redistribute static metric 1 1 1 1 1
redistribute rip metric 1 1 1 1 1
network 1.0.0.0
network 131.1.0.0
no auto-summary
router rip
version 2
passive-interface default
no passive-interface FastEthernet1/0
network 200.1.1.0
no auto-summary

R1#r stat
S 11.0.0.0/8 is directly connected, FastEthernet1/0
R1#r c
1.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
C 1.1.0.0/24 is directly connected, Loopback0
C 1.1.1.0/24 is directly connected, Loopback1
C 1.1.2.0/24 is directly connected, Loopback2
C 1.1.3.0/24 is directly connected, Loopback3
C 200.1.1.0/24 is directly connected, FastEthernet1/0
131.1.0.0/24 is subnetted, 1 subnets
C 131.1.12.0 is directly connected, Serial0/0.12
R1#i s0/0.12
Building configuration…

Current configuration : 195 bytes
!
interface Serial0/0.12 point-to-point
ip address 131.1.12.1 255.255.255.0
ip summary-address eigrp 100 1.1.0.0 255.255.252.0 12
snmp trap link-status
frame-relay interface-dlci 102
end

R1#

R1#e n
IP-EIGRP neighbors for process 100
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 131.1.12.2 Se0/0.12 12 00:01:49 152 1368 0 124
R1#

This is the normal routing table of R2

R2#r e
1.0.0.0/22 is subnetted, 1 subnets
D 1.1.0.0 [90/2297856] via 131.1.12.1, 00:02:01, Serial0/0.12
D EX 200.1.1.0/24 [170/2560512256] via 131.1.12.1, 00:02:01, Serial0/0.12
D EX 11.0.0.0/8 [170/2560512256] via 131.1.12.1, 00:02:01, Serial0/0.12
R2#

On R2 we received the following from R1:

- static routes of R1
- connected but summarized routes of R1 – EX 11.0.0.0/8
- External IGP routes (from R1’s RIP) – EX 200.1.1.0/24

Now we will demonstrate the EIGRP stub feature.
In this scenario we will configure R1 for EIGRP stub feature.

R1(config)#router eigrp 100
R1(config-router)#?
Router configuration commands:
eigrp EIGRP specific commands
R1(config-router)#eigrp ?
stub Set IP-EIGRP as stubbed router

R1(config-router)#eigrp stub ?
connected Do advertise connected routes
leak-map Allow dynamic prefixes based on the leak-map
receive-only Set IP-EIGRP as receive only neighbor
redistributed Do advertise redistributed routes
static Do advertise static routes
summary Do advertise summary routes

Here we will demonstrate the following options:

connected Do advertise connected routes
leak-map Allow dynamic prefixes based on the leak-map
receive-only Set IP-EIGRP as receive only neighbor
redistributed Do advertise redistributed routes
static Do advertise static routes
summary Do advertise summary routes

Results:

ORIGINAL Routing table on R2:

R2#show ip route e
1.0.0.0/22 is subnetted, 1 subnets
D 1.1.0.0 [90/2297856] via 131.1.12.1, 00:02:01, Serial0/0.12
D EX 200.1.1.0/24 [170/2560512256] via 131.1.12.1, 00:02:01, Serial0/0.12
D EX 11.0.0.0/8 [170/2560512256] via 131.1.12.1, 00:02:01, Serial0/0.12
R2#
%DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 131.1.12.1 (Serial0/0.12) is down: Interface Goodbye received
R2#r e
%DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 131.1.12.1 (Serial0/0.12) is up: new adjacency

2. eigrp stub connected

R1(config-router)#eigrp stub connected

R2#show ip route e
1.0.0.0/24 is subnetted, 4 subnets
D 1.1.0.0 [90/2297856] via 131.1.12.1, 00:00:05, Serial0/0.12
D 1.1.1.0 [90/2297856] via 131.1.12.1, 00:00:05, Serial0/0.12
D 1.1.2.0 [90/2297856] via 131.1.12.1, 00:00:05, Serial0/0.12
D 1.1.3.0 [90/2297856] via 131.1.12.1, 00:00:05, Serial0/0.12

R2#

Result of R1(config-router)#eigrp stub summary on R2:

R2#show ip route e
1.0.0.0/22 is subnetted, 1 subnets
D 1.1.0.0 [90/2297856] via 131.1.12.1, 00:00:05, Serial0/0.12

Result of R1(config-router)#eigrp stub static on R2:

R2#show ip route e
D EX 11.0.0.0/8 [170/2560512256] via 131.1.12.1, 00:00:01, Serial0/0.12

Result of R1(config-router)#eigrp stub receive-only on R2: – NOTHING IS RECEIVED!

R2#show ip route e
R2#

Gets?

Posted by: Mar Apuhin | September 3, 2009

Show and tell (part 1 of many)

Configure R5 to have an output the same as below:

R5#sh queueing int f0/0 Interface FastEthernet0/0 queueing strategy: random early detection (WRED)     Random-detect not active on the dialer     Exp-weight-constant: 9 (1/512)     Mean queue depth: 0   class                     Random drop      Tail drop    Minimum Maximum  Mark                             pkts/bytes       pkts/bytes    thresh  thresh  prob       0                         0/0              0/0           20      40  1/10       1                         0/0              0/0           22      40  1/10       2                         0/0              0/0           24      40  1/10       3                         0/0              0/0           26      40  1/10       4                         0/0              0/0           28      40  1/10       5                         0/0              0/0           31      40  1/10       6                         0/0              0/0           33      40  1/10       7                         0/0              0/0           35      40  1/10    rsvp                         0/0              0/0           37      40  1/10 R5#sh queueing int f0/1 Interface FastEthernet0/1 queueing strategy: fair   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: Class-based queueing   Output queue: 0/1000/64/0 (size/max total/threshold/drops)      Conversations  0/1/256 (active/max active/max total)      Reserved Conversations 0/0 (allocated/max allocated)      Available Bandwidth 75000 kilobits/sec R5#sh policy-map int f0/1                   FastEthernet0/1   Service-policy output: WRED     Class-map: class-default (match-any)       25550 packets, 2163646 bytes       5 minute offered rate 0 bps, drop rate 0 bps       Match: any       Queueing         Flow Based Fair Queueing         Maximum Number of Hashed Queues 256         (total queued/total drops/no-buffer drops) 0/0/0          exponential weight: 9   class    Transmitted      Random drop      Tail drop    Minimum Maximum  Mark            pkts/bytes       pkts/bytes       pkts/bytes    thresh  thresh  prob       0   13809/1396426         0/0              0/0           20      40  1/10       1       0/0               0/0              0/0           22      40  1/10       2       0/0               0/0              0/0           24      40  1/10       3       0/0               0/0              0/0           26      40  1/10       4       0/0               0/0              0/0           28      40  1/10       5       0/0               0/0              0/0           30      40  1/10       6   11741/767220          0/0              0/0           32      40  1/10       7       0/0               0/0              0/0           34      40  1/10    rsvp       0/0               0/0              0/0           36      40  1/10 R5#  

Answer: (highlight to answer)

  interface FastEthernet0/0  random-detect interface FastEthernet0/1  service-policy output WRED policy-map WRED  class class-default   fair-queue   random-detect  
Posted by: Mar Apuhin | September 2, 2009

Which FILTER is the most appropriate?

Configure R5 so that these hosts can only use
normal HTTP applications from 9am – 5pm Monday – Friday. All traffic should be dropped during the hours outside of this.

R5:
interface FastEthernet0/1
ip access-group FILTER1 in
!
ip access-list extended FILTER1
permit tcp any any eq www time-range WORK_HOURS
deny ip any any
!
time-range WORK_HOURS
periodic weekdays 9:00 to 17:00

or

R5:

interface FastEthernet0/1
ip access-group FILTER2 in

ip access-list extended FILTER2
permit tcp any any eq www time-range WORK_HOURS
deny tcp any any eq www
permit ip any any

time-range WORK_HOURS
periodic weekdays 9:00 to 17:00

Which FILTER is the most appropriate?

During my lab sessions I tried to disable STP between 2 switches with 2 links connected in parallel. These are the effects of disabling spanning tree between two path switches.

Rack1SW3(config)#no spanning-tree vlan 1363
Rack1SW3(config)#
*Mar 2 12:38:37.862: %SW_MATM-4-MACFLAP_NOTIF: Host 0014.f2ef.f300 in vlan 1363 is flapping between port Fa0/20 and port Fa0/21
Rack1SW3(config)#
*Mar 2 12:38:47.834: %SW_MATM-4-MACFLAP_NOTIF: Host 0014.f2ef.f300 in vlan 1363 is flapping between port Fa0/20 and port Fa0/21
Rack1SW3(config)#
*Mar 2 12:39:02.994: %SW_MATM-4-MACFLAP_NOTIF: Host 0014.f2ef.f300 in vlan 1363 is flapping between port Fa0/20 and port Fa0/21
Rack1SW3(config)#

After putting the switcport backup interface

Rack1SW4(config-if)#switchport backup interface f0/21
*Mar 2 12:41:04.494: %SPANTREE-6-PORTDEL_ALL_VLANS: FastEthernet0/20 deleted from all Vlans
*Mar 2 12:41:04.494: %SPANTREE-6-PORTDEL_ALL_VLANS: FastEthernet0/21 deleted from all Vlans
Rack1SW4(config-if)#switchport backup interface f0/21?
:

Rack1SW4(config-if)#switchport backup interface f0/21 ?
mmu mac-address move update
preemption preemption parameters
prefer load-balancing

Posted by: Mar Apuhin | August 14, 2009

The Proper CCIE Study Approach

• The first step is to get a basic
understanding
• The second step is to gain hands-on
experience to reinforce and expand your
understanding
• The third step is to gain an expert level of
understanding
• The fourth step is to finally gain the expert
level hands-on experience

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