{"id":5141,"date":"2015-02-27T15:12:40","date_gmt":"2015-02-27T15:12:40","guid":{"rendered":"http:\/\/32478000127144839.blog.com.gr\/?page_id=5141"},"modified":"2025-10-09T09:42:19","modified_gmt":"2025-10-09T09:42:19","slug":"technical-specifications","status":"publish","type":"page","link":"https:\/\/www.gr-ix.gr\/el\/technical-specifications\/","title":{"rendered":"Technical Specifications"},"content":{"rendered":"
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Physical Interface Specifications<\/h2>\n

The following types\/speeds of Ethernet interfaces are available:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
If\/ce<\/th>\n\n

Cable\/Fibre Type<\/p>\n<\/th>\n

WaveLength<\/th>\nDistance<\/th>\nInput
\n(dbm)<\/th>\n		Output
\n(dbm)<\/th>\n<\/tr>\n<\/thead>\n
1 Gbps<\/strong><\/span><\/td>\n<\/tr>\n
TX<\/strong><\/td>\nUTP cat5e<\/td>\nN\/A<\/td>\n100m<\/td>\nN\/A<\/td>\nN\/A<\/td>\n<\/tr>\n
SX*<\/strong><\/td>\nMultiMode fibre 62.5\/125\u03bcm OM1<\/td>\n850 nm<\/td>\n275m<\/td>\n0 \u2026 -21<\/td>\n~-3<\/td>\n<\/tr>\n
LX<\/strong><\/td>\nSingleMode fibre<\/td>\n1310 nm<\/td>\n10km<\/td>\n-3 \u2026 -25<\/td>\n-3<\/td>\n<\/tr>\n
10 Gbps<\/strong><\/span><\/td>\n<\/tr>\n
SR*<\/strong><\/td>\nMultiMode fibre 62.5\/125\u03bcm OM1<\/td>\n850 nm<\/td>\n33m<\/td>\n-1 \u2026 -9.9<\/td>\n~ -1<\/td>\n<\/tr>\n
LR<\/strong><\/td>\nSingleMode fibre 9\/125<\/td>\n1310 nm<\/td>\n10km<\/td>\n0.5 \u2026 -18<\/td>\n~0.5<\/td>\n<\/tr>\n
ER<\/strong><\/td>\nSingleMode fibre<\/td>\n1550 nm<\/td>\n40km<\/td>\n-1 \u2026 -15.8<\/td>\n~4<\/td>\n<\/tr>\n
100 Gbps<\/strong><\/span><\/td>\n<\/tr>\n
LR4*<\/strong><\/td>\nSingleMode fibre 9\/125<\/td>\n1310 nm<\/td>\n10km<\/td>\n-10.6 \u2026 4.5 each lane<\/td>\n-4.3 \u2026 4.5 each lane<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

*only available in ATH01 POP.<\/p>\n

 <\/p>\n

Ethernet Specifications<\/h2>\n

Framing & Ethertypes<\/h3>\n

The GR-IX infrastructure offers ports that implement the Ethernet standard (IEEE 802.3-2012 \/ Ethernet II).<\/p>\n

The members\u2019 ports are, by default, in \u201caccess\u201d mode, which means that only untagged Ethernet Frames are allowed. 802.1q-tagged frames can be supported, if necessary (e.g., for private peerings).<\/p>\n

Allowed ethertypes are: IPv4 (0x0800), IPv6 (0x06dd), ARP (0x0806) and 802.3ad \u2013 LACP (0x8809)<\/strong><\/em>. Traffic with any other ethertype may be dropped without notice.<\/p>\n

Maximum Transmission Unit (MTU)<\/h3>\n

The allowed L2 payload (L3 MTU) for GR-IX is 9000 bytes. Frames exceeding this payload may be dropped without further notice.<\/p>\n

Link Aggregation (a.k.a link-bundling, ether-channel, port-channel)<\/h3>\n

Links of the same speed, on the same device, can be bundled into a single logical interface. Bundling can be configured statically or dynamically through LACP (802.3ad).<\/p>\n

In both cases,\u00a0per-flow<\/strong> load-balancing is implemented\u00a0 (source\/destination IP addresses & ports).<\/p>\n

Port Speed\/Duplex<\/h3>\n

For copper ports<\/span>, GR-IX explicitly configures speed and full-duplex on its side; and auto-negotiation is enabled (so that these settings are advertised to the members). Members can explicitly configure speed\/full-duplex, or rely on a<\/span>uto-negotiation, or do both (explicitly configure speed\/full-duplex and keep auto-negotiation active) — the latter is the safest option, thus suggested.
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Public Peering LAN Specifications<\/h2>\n

Addressing<\/h3>\n
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The public peering LAN address space is:<\/div>\n