Mirroring 802.1q trunk interfaces while preserving the tags

Earlier today I was needing to verify two pieces of configured equipment were using the correct 802.q trunks by using a packet capture. Continue reading “Mirroring 802.1q trunk interfaces while preserving the tags”

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Using an ASR9000 with Calix E7 gear

I worked recently to add a Calix E7 to a network to do GPON Fiber for Ethernet customers. The customers would need to get a dhcp address for a dhcp server, and I needed to add DHCP Option 82 logging for record keeping purposes. Continue reading “Using an ASR9000 with Calix E7 gear”

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Allowing UNI or protected ports on Cisco switch to reach each other using IP

When deploying Metro Ethernet service and Colocated services, best practice it to put the ports in protected mode or uni. This is to prevent customers from causing interference to each other with layer2 protocols. It also allows the user of service provider traffic filtering. The downside is without additional configuration, customer traffic to another customer is blackholed when they exist in the same subnet. Continue reading “Allowing UNI or protected ports on Cisco switch to reach each other using IP”

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Setting up 802.q and switch ports in an ASR9000

IOS-XR has a structure that is very different than standard IOS. I would recomend checking the different documentation at Cisco.com┬áthis post is not going to explain things like having to commit a config before it is applied… etc, but rather I am going to assume you have read the getting started guide.

The project that lead to me being exposed to an ASR9000 is a network migration that is replacing a pair of 7200 routers and a 3750 switch (which is only being used for layer2 features) with a single ASR9000 with Redundant RSPs. The ASR has a 40 port gig module and a 4 port 10 gig module. To replace the switch I need to add ports to a “vlan” and trunk those vlans to downstream switches at other pops. Continue reading “Setting up 802.q and switch ports in an ASR9000”

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