Hottest Questions This Month

21

votes

8

answers

3k

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Why can't devices on different VLANs, but on the same subnet, communicate?

switch vlan subnet

answered Apr 13 at 18:30 telcoM 126

10

votes

3

answers

1k

views

Are the IPv6 address space and IPv4 address space completely disjoint?

ip ipv4 ipv6 protocol-theory ip-address

answered Mar 24 at 11:48 juhist 372

5

votes

2

answers

793

views

Why do IPv6 unique local addresses have to have a /48 prefix?

ip network ipv6 protocol-theory networking

modified Mar 25 at 3:09 Ron Maupin♦ 68.7k

2

votes

2

answers

826

views

At which OSI layer a user-generated data resides?

osi

modified Mar 29 at 15:44 Zac67 33.2k

7

votes

2

answers

749

views

What exact does MIB represent in SNMP? How is it different from OID?

snmp management

answered Mar 30 at 19:43 Constantine Yevdyukhin 11

3

votes

3

answers

410

views

Do VLANs within a subnet need to have their own subnet for router on a stick?

router vlan subnet trunk gateway

answered Apr 11 at 16:22 Ricky 1

4

votes

2

answers

310

views

APIPA and LAN Broadcast Domain

networking

answered Apr 11 at 15:24 serverAdmin123 371

3

votes

4

answers

112

views

WAN encapsulation

protocol-theory transport-protocol wan

modified Apr 16 at 11:40 jonathanjo 12.4k

2

votes

2

answers

288

views

Do the concepts of IP address and network interface not belong to the same layer?

ip-address interface osi

answered Mar 24 at 14:06 Ron Trunk 40k

2

votes

3

answers

160

views

Do all network devices need to make routing decisions, regardless of communication across networks or within a network?

routing

answered Mar 29 at 18:40 Peter Green 8,182

6

votes

1

answer

332

views

What does routing an IP address mean?

routing ip-address

modified Mar 23 at 17:58 Zac67 33.2k

4

votes

3

answers

287

views

Why the last AS PATH item always is `I` or `?`? [closed]

router bgp juniper

answered Mar 31 at 18:53 NABEEL NASIR 231

2

votes

2

answers

62

views

Is static routing used in large networks?

routing layer3

answered Mar 23 at 8:41 Tommiie 269

0

votes

4

answers

72

views

Does a gateway need to be designated?

routing gateway

answered Mar 27 at 21:53 Peter Green 8,182

1

vote

1

answer

263

views

What's the commands of Cisco query bgp neighbor table, bgp table and router table?

cisco router bgp

answered Apr 1 at 4:02 serverAdmin123 371

4

votes

2

answers

95

views

Portfast on Trunk port

cisco trunk

modified Apr 14 at 18:59 Marc 'netztier' Luethi 4,511

3

votes

2

answers

188

views

How to understand the output below from BGP?

router bgp

modified Mar 25 at 11:42 Sebastian Wiesinger 6,264

4

votes

1

answer

163

views

What does “Allow AS in” do in BGP?

bgp

modified Mar 28 at 14:01 JFL 12.4k

4

votes

2

answers

86

views

Cisco ASA 5585X Internal-Data0/1 interface errors

cisco cisco-asa firewall interface packet-loss

modified Apr 9 at 13:43 Cown 6,991

3

votes

3

answers

72

views

Is it possible that two servers were configured with the same ip under the same switch

switch ip ipv4 network ip-address

modified Apr 13 at 9:57 Zac67 33.2k

3

votes

1

answer

149

views

Use BFD on a Virtual-Template Interface

cisco cisco-ios-15 ios-xe bfd

modified Apr 16 at 14:41 user56700 106

5

votes

2

answers

114

views

How to architect a globally distributed website, from an IP address perspective

routing ip ipv4 ipv6 ip-address

modified Apr 14 at 13:44 Ron Maupin♦ 68.7k

2

votes

2

answers

52

views

Client timeout for Cisco IOS Static DHCP Pool

cisco ipv4 cisco-ios dhcp mac-address

answered Apr 8 at 11:48 jonathanjo 12.4k

0

votes

1

answer

66

views

On a 3560E Switch

vlan arp

modified Mar 29 at 18:39 Mike Mongillo 1

-3

votes

1

answer

79

views

What accessories included by default if I buy/order an SFP module

sfp

modified Apr 10 at 13:07 Mike Pennington 26.8k

0

votes

1

answer

58

views

What is the meaning/translation of a MAC address?

mac-address

answered Apr 4 at 9:37 Cown 6,991

0

votes

1

answer

45

views

My BGP router does not advertise configured prefixes

cisco router bgp

modified Mar 28 at 4:08 244boy 429

0

votes

3

answers

67

views

Switch syntax, vlanXX and vlan [space] XX

vlan cisco-ios switchport

modified Apr 6 at 7:34 Zac67 33.2k

3

votes

1

answer

74

views

Public and Private IPs

routing ip ipv4 isp wan

modified Apr 5 at 20:50 Zac67 33.2k

4

votes

3

answers

73

views

Why do all the intermediary routers need to run iBGP without tunneling?

routing bgp protocol-theory tunnel

answered Mar 30 at 19:46 sergeyrar 626

0

votes

3

answers

88

views

Why can the BGP protocol be implemented across routers, but the OSPF protocol can only be implemented direct connected routers?

router bgp ospf

modified Mar 26 at 2:02 244boy 429

0

votes

1

answer

41

views

Why Cisco BGP neighbor command need the remote-as number?

cisco router bgp

modified Mar 27 at 16:51 Community♦ 1

1

vote

2

answers

67

views

Cisco ip helper-address how exactly translation works?

cisco cisco-ios cisco-commands

modified Apr 16 at 19:41 Marc 'netztier' Luethi 4,511

0

votes

1

answer

39

views

Is “gateway” a concept between two or more networks or a concept belonging to just one network?

routing router gateway

modified Mar 27 at 14:22 Ron Trunk 40k

1

vote

1

answer

79

views

No DHCPOFFER message captured in Wireshark

dhcp wireshark

modified Mar 29 at 11:40 deuter 6

1

vote

2

answers

60

views

Finding a lost device

cisco routing

answered Apr 1 at 21:26 Tim Brigham 346

0

votes

2

answers

36

views

Does NAT always translate the destination address of a packet?

nat

modified Mar 29 at 13:39 Zac67 33.2k

3

votes

1

answer

94

views

Advertise all static route except the default gateway with Juniper SRX firewall

routing bgp juniper juniper-junos juniper-srx

modified Mar 26 at 10:38 Teun Vink♦ 12.1k

3

votes

1

answer

73

views

Dump traffic on routing-instance with a Juniper SRX firewall

juniper juniper-junos juniper-srx tcpdump

answered Apr 2 at 12:38 Benjamin Dale 7,449

1

vote

3

answers

44

views

Correct term for networks created for virtual machines and containers?

vpn terminology private-vlan virtual

answered Mar 28 at 15:37 jonathanjo 12.4k

0

votes

1

answer

44

views

Duplex Mismatch Detection

cisco-commands

answered Apr 18 at 6:48 JFL 12.4k

0

votes

4

answers

90

views

Why Vlans need routers to communicate?

router vlan subnet network topology

answered Apr 16 at 1:20 YLearn♦ 22.5k

2

votes

2

answers

51

views

Advice on Patch Panels

cabling

modified Apr 16 at 11:50 jonathanjo 12.4k

0

votes

1

answer

65

views

How to use ICMP to send message

ping icmp pcap

modified Mar 30 at 16:23 Zac67 33.2k

4

votes

2

answers

38

views

C3560CX-8PT-S UPOE

cisco power-over-ethernet

modified Apr 17 at 5:42 user56700 106

0

votes

1

answer

37

views

What IP address can't be the destination address in a packet?

ip-address

modified Mar 25 at 10:33 JFL 12.4k

3

votes

1

answer

57

views

ISE - Command missing?

cisco-ise

modified Apr 5 at 6:13 Cown 6,991

0

votes

3

answers

53

views

How to explain the data flow of OSI model layers in a single picture [closed]

network network-core osi networking data

modified Mar 25 at 14:47 Zac67 33.2k

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