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1500 questions
9
votes
2 answers
Which QoS classification should be applied to NTP?
Cisco's Enterprise QoS Solution Reference Network Design suggests classifying NTP as network management traffic and marking it as CS2:
When addressing the QoS needs of Network Management traffic, Cisco recommends the following guidelines:
Network…
Stephen Craven
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- 15
9
votes
2 answers
BGP remote-triggered blackhole (RTBH) filter for Juniper
I'm trying to find the most elegant way to implement a RTBH filter for routes received from a customer.
The filter should:
Only accept the customers own prefixes from a prefix-list
Only accept /32 prefixes
Only prefixes with the blackhole…
Sebastian Wiesinger
- 8,107
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9
votes
1 answer
How sensitive is TDMoE to BER?
We are currently looking at connecting two Asterisk servers across a Metro Ethernet. This leads to a couple of questions I haven't been able to find answers to elsewhere.
The first involves bit error rates and cabling. I would expect that TDMoE,…
Chris Travers
- 1,848
- 17
- 16
9
votes
1 answer
Cisco Nexus 7000 Sup-2 and 2E, why no CMP?
I am looking at an upgrade from Nexus 7000 Supervisor 1's to Supervisor 2E's.
One of the differences that I am seeing is a lack of the CMP (Connectivity Managment Processor) and the CMP port. Even on the config guide for CMP, here, it says:
Note:…
Brett Lykins
- 8,288
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- 36
- 66
9
votes
2 answers
How to handle performance degradation deep in your provider's network?
What are some possible ways to detect packet loss deep in a provider's network that is several hops away? With multiple providers peered over BGP on our Internet edge routers, I need to be able to automatically detect packet loss (primarily) and…
generalnetworkerror
- 7,094
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- 32
- 65
9
votes
3 answers
Cisco 2901 - Determine if bundled T1s are up based on bandwidth?
I have a Cisco 2901 at a remote branch office connected via ge0/1 to an Adtran that is managed by TW Telecom with 8 T1s bundled together for an MPLS circuit.
I don't have access to the Adtran gear, it belongs and is serviced by TW.
At times we've…
TheCleaner
- 265
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- 7
9
votes
3 answers
VM on a client connected to a Cisco 1262 unable to DHCP (but IPv6 works fine)
I recently replaced wireless at a site from the internal AP on an 877-WM with a (standalone) 1262 running 15.2(2)JB. I've configured the AP pretty much the same as I always do for Cisco AP's for single SSID operation (single bridge domain, BVI1 also…
LapTop006
- 1,743
- 11
- 24
9
votes
2 answers
pfSense multi-wan Bridge, NAT, Load balancing and CARP
Context
I currently have :
1 pfSense 2.0.2 router (on a Firebox X-Peak X5000)
2 WAN
1 LAN
3 Servers
My interfaces
WAN1 68.XX.XXX.98 to 69.XX.XXX.102
WAN2 65.XXX.XXX.58 to 66.XXX.XXX.62
LAN 192.168.1.XXX
DMZ
My router is configured like this…
Alexandre Lavoie
- 337
- 3
- 12
9
votes
4 answers
How does one specify certain IPs or MAC addresses for NBAR policy enforcement?
In an office environment, if I wanted to block youtube using a Cisco ISR router, I would set up the following with NBAR:
class-map match-all YOUTUBE
match protocol http host "*youtube.com*"
!
policy-map DROP_YOUTUBE
class YOUTUBE
…
lamp_scaler
- 655
- 2
- 7
- 15
9
votes
2 answers
Configure External Interface for DHCPv6 client on Cisco IOS
What are the necessary steps to configure IOS 12.4(25f) to support IPv6? Comcast is the ISP, and I'll be using a Server 2012 box for internal DHCPv6.
I'll need to grab a DHCPv6 address from Comcast for the external interface.
So far, on my external…
user1569
9
votes
1 answer
Blocking IPv6 RA advertisements on Juniper EX series switch
How do I go about blocking IPv6 RA advertisements on access ports on a Juniper EX series switch? I know that Cisco offers ra-guard as an option much like bpdu-guard on spanning tree, I am just not sure how to accomplish the same thing in Junos.
YerPhate
- 111
- 4
9
votes
3 answers
Assign an IP address based on switch port
Short:
I want DHCP server to assign a preconfigured IP address based on a port (on a switch, ideally) a device is connected to.
Long:
My situation:
I am building an automated indoor farm (for growing tomatoes). The farm is composed of many (12 for…
THX-1138
- 193
- 1
- 1
- 4
9
votes
3 answers
AAA/TACACS+ password on Cisco switch always fails at second password prompt
Whenever logging into a network device using AAA/TACACS+, if I fat-finger the password prompt after the username prompt, the second password prompt always fails even when the password is correct. I have to wait for the username prompt again, and…
generalnetworkerror
- 7,094
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- 32
- 65
9
votes
3 answers
What type of fiber do I need for a WS-G5484
I have bought two WS-2948G switches from cisco for a lab. I now need to buy two additional modules for them WS-G5484. I've never worked with fiber so I was wondering if there are differences in fiber cables and what type of fiber cable I should use…
Lucas Kauffman
- 4,151
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- 51
9
votes
2 answers
CDP not available to be enabled on ME3400 port
We have a ME3400 that we want to enable CDP on but there is no cdp option. Why is it not available?
switch(config)#int gi0/1
switch(config-if)#cdp ?
% Unrecognized command
CDP is enabled globally.
switch#show cdp
Global CDP information:
…
Adam Loveless
- 3,129
- 7
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- 51