About Andrew Xue Zheng Lay

Andrew Xue Zheng Lay · 12-05-2015

Hi, I need some help in understanding MPLS Traceroute. My P Routers are displayed as Asterisk (*), and I'm not sure why. And before someone comment about this... I do not have "no mpls ip propogation-ttl" SPOKE_B_USER#traceroute 172.16.1.11 probe 1T...

Andrew Xue Zheng Lay · 10-12-2015

DHCP Server R1(config)#ipv6 dhcp pool [DHCP]2001:1::/64 R1(config-dhcpv6)#address prefix 2001:1::/64 R1(config-dhcpv6)#dns-server 2001:1::1 R1(config-dhcpv6)#domain-name cisco.com R1(config)#int fa0/0 R1(config-if)#ipv6 address 2001:1::1/64 R1(confi...

Andrew Xue Zheng Lay · 09-07-2015

R1(config-if)#rate-limit input 50000000 1562500 1562500 conform-action ? continue scan other rate limits drop drop packet set-dscp-continue set dscp, scan other rate limits ...

Andrew Xue Zheng Lay · 07-25-2015

Hi, According to Cisco QOS Exam Certification Guide 2nd Edition: WFQ calculates the SN before adding a packet to its associated queue. In fact, WFQ calculates the SN before making the drop decision, because the SN is part of the modified tail-drop...

Andrew Xue Zheng Lay · 07-23-2015

According to "Cisco QOS Exam Certification Guide 2nd Edition", it states that: Currently, CBWFQ can use either FIFO or WFQ inside the class-default queue. With Flow-Based WFQ in the class-default queue, when CBWFQ decides to take one or more packet...

Andrew Xue Zheng Lay · 12-05-2015

Nah... I think it's fine now. I have no problems sticking to the traditional NAT. I didn't have good experience with NVI since the past anyway. Did a LAN-Internet NVI with Static Mapping on a 2611XM a couple of years back, turns out that performance...

Andrew Xue Zheng Lay · 12-05-2015

Found the actual cause of the problem. CE-H is running NVI "ip nat enable". Swapped it with regular NAT "ip nat inside" and it resolves the issue. I'm not sure how or why it will affect the MPLS traceroute though.

Andrew Xue Zheng Lay · 12-05-2015

Hi Peter, I've found the cause of the issue actually. But... I do not understand why it is happening that way. This is supposed to be like a Hub and Spoke Topology by the way. Spoke to Spoke traffic must pass through Hub. On PE1, I've added PE1(con...

Andrew Xue Zheng Lay · 10-19-2015

Well... Prefix Delegation is actually talking about a different thing. The DHCPCLIENT is actually getting its s0/0 IPv6 EUI-64 Address using SLAAC.The DHCPSERVER do advertise the Prefix, but just the Prefix alone. DHCPCLIENT receives it on s0/0, and ...

Andrew Xue Zheng Lay · 10-17-2015

Anyone?

Member Since	‎11-30-2011 06:48 PM
Date Last Visited	‎10-13-2017 10:13 AM
Posts	51

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MPLS Traceroute - P Router Asterisk (*)

Stateful DHCPv6 - Why am I getting a /128 Subnet?

Legacy QoS - Rate-Limit - Continue

WFQ - Sequence Number Formula

CBWFQ - Are there multiple Queues per Class, or one Queue per Class?

Nah... I think it's fine now.

OMG... Piece of sh##!

topology.png

Well... Prefix Delegation is

Anyone?