I recently met an old friend who is the IT director of a big company. Because I haven't seen it for a long time that  my old friend has a lot of trouble.

 A day about hard work and IT

 Cisco Group Management Protocol CGMP is primarily used to restrict the forwarding of IP multicast packets only to ports connected to IP multicast clients.  These clients automatically join and leave groups that receive IP multicast traffic, and the switch dynamically changes its forwarding behavior based on the request.

1. Question: How does the bgp routing table redistribute the default route?

 Answer: Method 1: Static routing network

      Ip route 0.0.0.0 0.0.0.0 + next hop

      Then in the bgp process network 0.0.0.0 can inject this default route into the bgp process

      The default route introduced in bgp using this method will be passed to all bgp neighbors.

      Method two: default-information originate

DIAG 1

The first question is if SW3 has port-security or DIAG1 is not DIAG1+

The second question is if e16/0 of R16 ，the mask is /30 is DIAG1, if it is /29 it will be DIAG1+

DIAG1 Answer -------------

T1 STP

Q1: SW3, command: show ip int bri

Q2: What information is used to confirm the problem: HOST1, what the mac add of e0/0

T2 DMVPN

PASSHOT shares some CCIE Lab learning materials. If you are studying CCIE R&S lab, it will be of great help to you!

TS1

Q1: The MAC addresses of SW2 and R8 ports are different. The PC101 MAC address needs to be specified.

Q2: R17 s4/0 is less than ppp ipcp default

Q3: R22 mask error is changed to 248

Q4: R13 no prefix-list deny 145.14.14.14/32 is fine

R11-R14 is fully equipped with metric weight 0 1 1 1 1 1 Otherwise 1603/1703 is not right.

Q5: R22 IBGP does not set next-hop-self R21 prefix 194 does not write 194.1.0.0/16.

1. Question: Set up two core devices of VRRP. The spanning tree elects itself as root.

Answer: In the MSTP network, the vlan associated with the spanning tree instance of the entire network must be consistent. Otherwise, the root election will be confused.

2. Question: Does Cisco's switch support Load balancing?

Answer: Support.

It’s just beginning through CCIE Now I think of taking CCIE that it was quite a long time ago. I’m going to write this to commemorate the years that are still memorable. I skipped the NA and NP exams of cisco and took the CCIE exams directly. Considering the time cost of NA and NP, it is also necessary to study for a long time to prepare for the exam. Also, when I decided to take the exam, I had been working for several years in the networking industry which cisco equipment often encounters.

1. Question: There are two ONC frames, one frame has one node and the other frame has two nodes. Can these three nodes be clustered? Answer: Yes. Nodes with different frames can be clustered to ensure connectivity.

1. Question: If mac-based 1x authentication after the success of that user authentication, the subsequent user authentication will normally jump to the vlan? Will it affect users who have previously been successfully authenticated? Answer: Configure mac vlan to jump and not affect each other. 2. Question: If you do not need SAM execution to get users offline, can I remove SAM in anti-agent scenarios? Answer: No, ASME needs to rely on SAM synchronization user offline information. So as to view a user's agent situation.