VRRP
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This document discusses the Virtual Router Redundancy Protocol (VRRP), which provides gateway redundancy when the primary gateway fails. VRRP uses hello messages and elects a master router based on priority to direct traffic to backup routers and avoid downtime. The configuration assigns IP addresses to interfaces, sets the virtual IP address, and adjusts the priority values for master and backup routers.
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- Other labs cover PPP authentication, NAT, ACLs, IPv6, and more. The labs provide instructions to configure the protocols and verify their operation in sample network topologies.
1-300-206 (SENSS)=Firewall (642-618)
This document provides an overview of various network security solutions that can be implemented on Cisco edge networks. It begins with a description of common switching security features like port security, DHCP snooping, and dynamic ARP inspection. It then covers private VLANs, protected ports, and various access control lists that can filter traffic. The document also discusses remote management solutions, SSH authentication, SNMPv3, zone-based firewalls, AAA, and best practices. Finally, it provides brief summaries of features related to the ASA firewall, IPS/IDS virtualization, ISE, ACS, and packet capture functionality.
OpenNebulaConf2018 - Scalable L2 overlay networks with routed VXLAN / BGP EVP...
A novel way of creating overlay networks for OpenNebula is presented here. Using BGP Ethernet VPN (EVPN) with VXLAN data-plane encapsulation. This provides scalable Layer 2 over IP networks.
Ip services
This document provides information on various IP routing protocols:
- It describes the characteristics and types of IP services, including first hop routing protocols (FHRP) like HSRP, VRRP, and GLBP.
- VRRP and GLBP provide router redundancy and load balancing. VRRP supports up to 255 groups while GLBP supports up to 1024 virtual routers.
- HSRP establishes a default gateway with one active and one standby router. It is Cisco proprietary while VRRP is a multivendor standard.
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Fedv6tf-fhs
IPv6 access security provides three main methods for securing first hop connections: IPv6 first hop security, secure neighbor discovery, and 802.1x authentication. These methods help protect against spoofing, man-in-the-middle attacks, and denial of service attacks on IPv6 networks.
Nexus 1000v part ii
The document discusses several security features of the Nexus 1000v virtual switch:
- It supports features like IGMP snooping, DHCP snooping, Dynamic ARP inspection, IP Source Guard, and ACLs to provide layer 2 security for virtual machines.
- These features work similarly to physical switches, protecting the layer 2 network from unmanaged VMs, but they are configured through the virtual Ethernet module interfaces.
- Dynamic ARP inspection and IP Source Guard rely on entries in the DHCP snooping binding database to validate IP-MAC bindings and filter invalid traffic from untrusted ports.
#RIPv1 vs #RIPv2
RIPv1 is a classful distance-vector routing protocol that sends periodic updates via broadcast every 30 seconds without authentication. It does not support VLSM or subnets. RIPv2 is a classless hybrid routing protocol that uses multicast to send periodic or triggered updates with the option to include subnet masks. It supports authentication, VLSM, and CIDR.
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PLNOG 13: Piotr Głaska: Quality of service monitoring in IP networks
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Netmiko login1
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CSMA/CD
CSMA/CD is a protocol used by Ethernet networking to avoid collisions when packets are transmitted simultaneously from different nodes. It is a carrier sense multiple access protocol with collision detection, where a host checks for existing signals on the wire before transmitting and sends a jam signal if it detects a collision, prompting all hosts to wait before retransmitting using a backoff algorithm to share bandwidth evenly.
Udld
This document provides an overview of the Unidirectional Link Detection (UDLD) protocol. UDLD is used to detect unidirectional links caused by incorrect fiber or switch port configurations. It works by exchanging UDLD packets between devices connected by fiber links. If packets are not reciprocated, the link is considered unidirectional and can be disabled to prevent spanning tree loops. The document discusses UDLD architecture, operation in normal and aggressive modes, default configuration parameters, and how to enable UDLD on switches.
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The document discusses private VLANs, which restrict communication within VLANs to isolate ports and servers from each other while allowing internet access. It defines private VLAN classifications including secondary isolated and community VLANs that can partially communicate, as well as a primary VLAN that acts as a router. The document provides an example configuration of private VLANs to associate different ports and isolate server communication within VLAN 101 and 102 while allowing internet access via VLAN 100.
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Uplink Fast provides fast convergence when the primary uplink fails on an access layer switch connected to two distribution layer switches. With Uplink Fast enabled, when the primary uplink fails, the access layer switch can switch to the blocking uplink within seconds instead of the typical 30 seconds, improving network stability and uptime. Uplink Fast should be enabled on all switches and VLANs to provide the fastest failover time.
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みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
ここ3000字までしか入らないけどタイトルの方がたくさん文字入ると思います。
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VRRP
- 1. Welcome to my Networking Channel Please subscribe to my channel SELVAJEGAN
- 2. VRRP
- 3. VRRP It is Virtual Router Redundancy Protocol It is standard based It is also called Gateway Redundancy Protocol Which is used when primary gateway goes down.
- 4. Why VRRP Primary Gateway down, no Redundancy
- 5. VRRP Communication VRRP communicates using hello Protocol It sends advertisements to multicast address using 224.0.0.18 It uses IP Protocol 112 It communicates using Virtual Mac address 0000.5e00.01xx where xx is the group number Hello Messages Hello Messages Master Backup
- 6. VRRP Election VRRP Advertisements are sent at 1 second interval One is elected as Master Router whereas all other routers are in the backup router Master is elected by router with the highest priority VRRP Preemption is enabled by default No Tracking Mechanism in VRRP Hello Messages Hello Messages Master Backup
- 7. VRRP Traffic Flow Vlan 10 192.168.10.2 0000.5e00.01xx 192.168.10.1 Master Backup Backup Router Priority_100 Master Router Priority_200 0000.0000.00aa 0000.0000.00bb 192.168.10.3 Vlan 10
- 8. VRRP Configuration Master Router ============== Interface vlan 10 Ip address 192.168.10.2------------------Master vrrp 10 ip 192.168.10.1-----------------VIP Vrrp 10 priority 200--------------------Priority Backup Router ============== Interface vlan 10 Ip address 192.168.10.3-------------------Backup vrrp 10 ip 192.168.10.1---------------------VIP (default priority 100) Show vrrp brief